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abcb53699a6eaeab41d974960ffd7e8648528f14
scryer-prolog/src/tests.rs
Mark Thom abcb53699a finalize support for partial strings
2018-09-02 23:32:51 -06:00

1905 lines
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use prolog::ast::*;
use prolog::heap_print::*;
use prolog::compile::*;
use prolog::machine::*;
use std::collections::HashSet;
use std::mem::swap;
pub struct TestOutputter {
results: Vec<HashSet<String>>,
contents: HashSet<String>,
focus: String
}
impl TestOutputter {
fn cache(&mut self) {
self.begin_new_var();
let mut contents = HashSet::new();
swap(&mut contents, &mut self.contents);
self.results.push(contents);
}
}
impl HCValueOutputter for TestOutputter {
type Output = Vec<HashSet<String>>;
fn new() -> Self {
TestOutputter { results: vec![],
contents: HashSet::new(),
focus: String::new() }
}
fn append(&mut self, focus: &str) {
self.focus += focus;
}
fn push_char(&mut self, c: char) {
self.focus.push(c);
}
fn begin_new_var(&mut self) {
if !self.focus.is_empty() {
let mut focus = String::new();
swap(&mut focus, &mut self.focus);
self.contents.insert(focus);
}
}
fn result(self) -> Self::Output {
self.results
}
fn ends_with(&self, s: &str) -> bool {
self.focus.ends_with(s)
}
fn len(&self) -> usize {
self.focus.len()
}
fn truncate(&mut self, len: usize) {
self.focus.truncate(len);
}
}
pub fn collect_test_output(wam: &mut Machine, alloc_locs: AllocVarDict, mut heap_locs: HeapVarDict)
-> Vec<HashSet<String>>
{
let mut output = TestOutputter::new();
output = wam.heap_view(&heap_locs, output);
output.cache();
while let EvalSession::SubsequentQuerySuccess = wam.continue_query(&alloc_locs, &mut heap_locs)
{
output = wam.heap_view(&heap_locs, output);
output.cache();
}
output.result()
}
pub fn collect_test_output_with_limit(wam: &mut Machine, alloc_locs: AllocVarDict,
mut heap_locs: HeapVarDict, limit: usize)
-> Vec<HashSet<String>>
{
let mut output = TestOutputter::new();
output = wam.heap_view(&heap_locs, output);
output.cache();
let mut count = 1;
if count == limit {
return output.result();
}
while let EvalSession::SubsequentQuerySuccess = wam.continue_query(&alloc_locs, &mut heap_locs)
{
output = wam.heap_view(&heap_locs, output);
output.cache();
count += 1;
if count == limit {
break;
}
}
output.result()
}
#[allow(dead_code)]
pub fn submit(wam: &mut Machine, buffer: &str) -> bool
{
wam.reset();
match parse_code(wam, buffer) {
Ok(tl) =>
match compile_packet(wam, tl) {
EvalSession::InitialQuerySuccess(_, _) |
EvalSession::EntrySuccess |
EvalSession::SubsequentQuerySuccess =>
true,
_ => false
},
Err(e) => panic!("parse error: {:?}", e)
}
}
#[allow(dead_code)]
pub fn submit_query(wam: &mut Machine, buffer: &str, result: Vec<HashSet<String>>) -> bool
{
wam.reset();
match parse_code(wam, buffer) {
Ok(tl) =>
match compile_packet(wam, tl) {
EvalSession::InitialQuerySuccess(alloc_locs, heap_locs) =>
result == collect_test_output(wam, alloc_locs, heap_locs),
EvalSession::EntrySuccess => true,
_ => false
},
Err(e) => panic!("parse error: {:?}", e)
}
}
#[allow(dead_code)]
pub fn submit_query_with_limit(wam: &mut Machine, buffer: &str,
result: Vec<HashSet<String>>, limit: usize)
-> bool
{
wam.reset();
match parse_code(wam, buffer) {
Ok(tl) =>
match compile_packet(wam, tl) {
EvalSession::InitialQuerySuccess(alloc_locs, heap_locs) =>
result == collect_test_output_with_limit(wam, alloc_locs,
heap_locs, limit),
EvalSession::EntrySuccess => true,
_ => false
},
Err(e) => panic!("parse error: {:?}", e)
}
}
#[allow(unused_macros)]
macro_rules! expand_strs {
($arr:expr) => (
$arr.into_iter().map(|s| String::from(*s)).collect()
)
}
#[allow(unused_macros)]
macro_rules! assert_prolog_success_with_limit {
($wam:expr, $buf:expr, [$($res:expr),*], $limit:expr) => (
assert!(submit_query_with_limit($wam, $buf, vec![$(expand_strs!($res)),*], $limit))
)
}
#[allow(unused_macros)]
macro_rules! assert_prolog_failure {
($wam: expr, $buf: expr) => (
assert_eq!(submit($wam, $buf), false)
)
}
#[allow(unused_macros)]
macro_rules! assert_prolog_success {
($wam:expr, $query:expr, [$($res:expr),*]) => (
assert!(submit_query($wam, $query, vec![$(expand_strs!($res)),*]))
);
($wam:expr, $buf:expr) => (
assert_eq!(submit($wam, $buf), true)
)
}
#[test]
fn test_queries_on_facts()
{
let mut wam = Machine::new();
submit(&mut wam, "p(Z, Z).");
submit(&mut wam, "clouds(are, nice).");
assert_prolog_success!(&mut wam, "?- p(Z, Z).", [["Z = _0"]]);
assert_prolog_success!(&mut wam, "?- p(Z, z).", [["Z = z"]]);
assert_prolog_success!(&mut wam, "?- p(Z, w).", [["Z = w"]]);
assert_prolog_failure!(&mut wam, "?- p(z, w).");
assert_prolog_success!(&mut wam, "?- p(w, w).");
assert_prolog_failure!(&mut wam, "?- clouds(Z, Z).");
assert_prolog_success!(&mut wam, "?- clouds(are, Z).", [["Z = nice"]]);
assert_prolog_success!(&mut wam, "?- clouds(Z, nice).", [["Z = are"]]);
submit(&mut wam, "p(Z, h(Z, W), f(W)).");
assert_prolog_failure!(&mut wam, "?- p(z, h(z, z), f(w)).");
assert_prolog_success!(&mut wam, "?- p(z, h(z, w), f(w)).");
assert_prolog_success!(&mut wam, "?- p(z, h(z, W), f(w)).", [["W = w"]]);
assert_prolog_success!(&mut wam, "?- p(Z, h(Z, w), f(Z)).", [["Z = w"]]);
assert_prolog_failure!(&mut wam, "?- p(z, h(Z, w), f(Z)).");
submit(&mut wam, "p(f(X), h(Y, f(a)), Y).");
assert_prolog_success!(&mut wam, "?- p(Z, h(Z, W), f(W)).", [["W = f(a)", "Z = f(f(a))"]]);
}
#[test]
fn test_queries_on_rules() {
let mut wam = Machine::new();
submit(&mut wam, "p(X, Y) :- q(X, Z), r(Z, Y).");
submit(&mut wam, "q(q, s).");
submit(&mut wam, "r(s, t).");
assert_prolog_success!(&mut wam, "?- p(X, Y).", [["Y = t", "X = q"]]);
assert_prolog_success!(&mut wam, "?- p(q, t).");
assert_prolog_failure!(&mut wam, "?- p(t, q).");
assert_prolog_success!(&mut wam, "?- p(q, T).", [["T = t"]]);
assert_prolog_failure!(&mut wam, "?- p(t, t).");
submit(&mut wam, "p(X, Y) :- q(f(f(X)), R), r(S, T).");
submit(&mut wam, "q(f(f(X)), r).");
assert_prolog_success!(&mut wam, "?- p(X, Y).", [["X = _0", "Y = _1"]]);
submit(&mut wam, "q(f(f(x)), r).");
assert_prolog_success!(&mut wam, "?- p(X, Y).", [["X = x", "Y = _1"]]);
submit(&mut wam, "p(X, Y) :- q(X, Y), r(X, Y).");
submit(&mut wam, "q(s, t).");
submit(&mut wam, "r(X, Y) :- r(a).");
submit(&mut wam, "r(a).");
assert_prolog_success!(&mut wam, "?- p(X, Y).", [["X = s", "Y = t"]]);
assert_prolog_failure!(&mut wam, "?- p(t, S).");
assert_prolog_success!(&mut wam, "?- p(s, T).", [["T = t"]]);
assert_prolog_success!(&mut wam, "?- p(S, t).", [["S = s"]]);
submit(&mut wam, "p(f(f(a), g(b), X), g(b), h) :- q(X, Y).");
submit(&mut wam, "q(X, Y).");
assert_prolog_success!(&mut wam, "?- p(f(X, Y, Z), g(b), h).",
[["Z = _3", "Y = g(b)", "X = f(a)"]]);
assert_prolog_failure!(&mut wam, "?- p(f(X, g(Y), Z), g(Z), X).");
assert_prolog_success!(&mut wam, "?- p(f(X, g(Y), Z), g(Z), h).",
[["Z = b", "Y = b", "X = f(a)"]]);
assert_prolog_success!(&mut wam, "?- p(Z, Y, X).",
[["X = h", "Y = g(b)", "Z = f(f(a), g(b), _7)"]]);
assert_prolog_success!(&mut wam, "?- p(f(X, Y, Z), Y, h).",
[["Y = g(b)", "Z = _3", "X = f(a)"]]);
submit(&mut wam, "p(_, f(_, Y, _)) :- h(Y).");
submit(&mut wam, "h(y).");
assert_prolog_success!(&mut wam, "?- p(_, f(_, Y, _)).", [["Y = y"]]);
assert_prolog_success!(&mut wam, "?- p(_, f(_, y, _)).");
assert_prolog_failure!(&mut wam, "?- p(_, f(_, z, _)).");
}
#[test]
fn test_queries_on_predicates() {
let mut wam = Machine::new();
submit(&mut wam, "p(X, a). p(b, X).");
assert_prolog_success!(&mut wam, "?- p(x, Y).", [["Y = a"]]);
assert_prolog_success!(&mut wam, "?- p(X, a).", [["X = _0"], // 1st case
["X = b"]]); // 2nd case.
assert_prolog_success!(&mut wam, "?- p(b, X).", [["X = a"], // 1st case
["X = _0"]]); // 2nd case.
assert_prolog_success!(&mut wam, "?- p(X, X).", [["X = a"],
["X = b"]]);
assert_prolog_success!(&mut wam, "?- p(b, a).");
assert_prolog_failure!(&mut wam, "?- p(a, b).");
submit(&mut wam, "p(X, Y, a). p(X, a, Y). p(X, Y, a).");
assert_prolog_success!(&mut wam, "?- p(c, d, X).", [["X = a"],
["X = a"]]);
assert_prolog_success!(&mut wam, "?- p(a, a, a).");
assert_prolog_failure!(&mut wam, "?- p(b, c, d).");
submit(&mut wam, "p(X, a). p(X, Y) :- q(Z), p(X, X).");
assert_prolog_success!(&mut wam, "?- p(X, Y).", [["X = _0", "Y = a"]]);
assert_prolog_success!(&mut wam, "?- p(x, a).");
assert_prolog_success!(&mut wam, "?- p(X, a).", [["X = _0"]]);
assert_prolog_failure!(&mut wam, "?- p(X, b).");
submit(&mut wam, "q(z).");
assert_prolog_success_with_limit!(&mut wam, "?- p(X, b).", [["X = a"],
["X = a"],
["X = a"]],
3);
assert_prolog_success!(&mut wam, "?- p(x, a).");
assert_prolog_success_with_limit!(&mut wam, "?- p(X, Y).", [["X = _0", "Y = a"],
["Y = _1", "X = a"],
["Y = _1", "X = a"]],
3);
submit(&mut wam, "p(X, a). p(X, Y) :- q(Y), p(X, X).");
assert_prolog_success_with_limit!(&mut wam, "?- p(X, Y).", [["X = _0", "Y = a"],
["Y = z", "X = a"]],
2);
assert_prolog_failure!(&mut wam, "?- p(X, b).");
submit(&mut wam, "p(a, z). p(X, Y) :- q(Y), p(X, Y).");
assert_prolog_success_with_limit!(&mut wam, "?- p(X, Y).", [["X = a", "Y = z"],
["X = a", "Y = z"]],
2);
assert_prolog_success_with_limit!(&mut wam, "?- p(X, z).", [["X = a"],
["X = a"]],
2);
assert_prolog_success!(&mut wam, "?- p(a, z).");
assert_prolog_success_with_limit!(&mut wam, "?- p(a, X).", [["X = z"],
["X = z"]],
2);
assert_prolog_failure!(&mut wam, "?- p(b, a).");
submit(&mut wam, "p(X, Y, Z) :- q(X), r(Y), s(Z).
p(a, b, Z) :- q(Z).");
submit(&mut wam, "q(x).");
submit(&mut wam, "r(y).");
submit(&mut wam, "s(z).");
assert_prolog_success!(&mut wam, "?- p(X, Y, Z).", [["Y = y", "X = x", "Z = z"],
["Y = b", "X = a", "Z = x"]]);
assert_prolog_failure!(&mut wam, "?- p(a, b, c).");
assert_prolog_success!(&mut wam, "?- p(a, b, C).", [["C = x"]]);
submit(&mut wam, "p(X) :- r(X).");
submit(&mut wam, "r(X) :- s(X, t). r(X) :- t(X, u).");
submit(&mut wam, "s(x, t).");
submit(&mut wam, "t(y, u).");
assert_prolog_success!(&mut wam, "?- p(X).", [["X = x"],
["X = y"]]);
assert_prolog_success!(&mut wam, "?- p(x).");
assert_prolog_success!(&mut wam, "?- p(y).");
assert_prolog_failure!(&mut wam, "?- p(z).");
submit(&mut wam, "p(f(f(X)), h(W), Y) :- g(W), h(W), f(X).
p(X, Y, Z) :- h(Y), g(W), z(Z).");
submit(&mut wam, "g(f(X)) :- z(X). g(X) :- h(X).");
submit(&mut wam, "h(w). h(x). h(z).");
submit(&mut wam, "f(s).");
submit(&mut wam, "z(Z).");
assert_prolog_success!(&mut wam, "?- p(X, Y, Z).", [["Y = h(w)", "X = f(f(s))", "Z = _2"],
["Y = h(x)", "X = f(f(s))", "Z = _2"],
["Y = h(z)", "X = f(f(s))", "Z = _2"],
["Y = w", "Z = _2", "X = _0"],
["Y = w", "Z = _2", "X = _0"],
["Y = w", "Z = _2", "X = _0"],
["Y = w", "Z = _2", "X = _0"],
["Y = x", "Z = _2", "X = _0"],
["Y = x", "Z = _2", "X = _0"],
["Y = x", "Z = _2", "X = _0"],
["Y = x", "Z = _2", "X = _0"],
["Y = z", "Z = _2", "X = _0"],
["Y = z", "Z = _2", "X = _0"],
["Y = z", "Z = _2", "X = _0"],
["Y = z", "Z = _2", "X = _0"]]);
assert_prolog_success!(&mut wam, "?- p(X, X, Z).", [["Z = _1", "X = w"],
["Z = _1", "X = w"],
["Z = _1", "X = w"],
["Z = _1", "X = w"],
["Z = _1", "X = x"],
["Z = _1", "X = x"],
["Z = _1", "X = x"],
["Z = _1", "X = x"],
["Z = _1", "X = z"],
["Z = _1", "X = z"],
["Z = _1", "X = z"],
["Z = _1", "X = z"]]);
assert_prolog_success!(&mut wam, "?- p(f(f(Z)), Y, Z).", [["Y = h(w)", "Z = s"],
["Y = h(x)", "Z = s"],
["Y = h(z)", "Z = s"],
["Y = w", "Z = _1"],
["Y = w", "Z = _1"],
["Y = w", "Z = _1"],
["Y = w", "Z = _1"],
["Y = x", "Z = _1"],
["Y = x", "Z = _1"],
["Y = x", "Z = _1"],
["Y = x", "Z = _1"],
["Y = z", "Z = _1"],
["Y = z", "Z = _1"],
["Y = z", "Z = _1"],
["Y = z", "Z = _1"]]);
assert_prolog_success!(&mut wam, "?- p(X, X, X).", [["X = w"],
["X = w"],
["X = w"],
["X = w"],
["X = x"],
["X = x"],
["X = x"],
["X = x"],
["X = z"],
["X = z"],
["X = z"],
["X = z"]]);
assert_prolog_success!(&mut wam, "?- p(X, Y, X).", [["Y = h(w)", "X = f(f(s))"],
["Y = h(x)", "X = f(f(s))"],
["Y = h(z)", "X = f(f(s))"],
["Y = w", "X = _0"],
["Y = w", "X = _0"],
["Y = w", "X = _0"],
["Y = w", "X = _0"],
["Y = x", "X = _0"],
["Y = x", "X = _0"],
["Y = x", "X = _0"],
["Y = x", "X = _0"],
["Y = z", "X = _0"],
["Y = z", "X = _0"],
["Y = z", "X = _0"],
["Y = z", "X = _0"]]);
assert_prolog_failure!(&mut wam, "?- p(f(f(X)), h(f(X)), Y).");
submit(&mut wam, "p(X) :- f(Y), g(Y), i(X, Y).");
submit(&mut wam, "g(f(a)). g(f(b)). g(f(c)).");
submit(&mut wam, "f(f(a)). f(f(b)). f(f(c)).");
submit(&mut wam, "i(X, X).");
assert_prolog_success!(&mut wam, "?- p(X).", [["X = f(a)"],
["X = f(b)"],
["X = f(c)"]]);
submit(&mut wam, "p(X) :- f(f(Y)), g(Y, f(Y)), i(X, f(Y)).");
submit(&mut wam, "g(Y, f(Y)) :- g(f(Y)).");
assert_prolog_success!(&mut wam, "?- p(X).", [["X = f(a)"],
["X = f(b)"],
["X = f(c)"]]);
}
#[test]
fn test_queries_on_cuts() {
let mut wam = Machine::new();
// test shallow cuts.
submit(&mut wam, "memberchk(X, [X|_]) :- !.
memberchk(X, [_|Xs]) :- memberchk(X, Xs).");
assert_prolog_success!(&mut wam, "?- memberchk(X, [a,b,c]).", [["X = a"]]);
assert_prolog_success!(&mut wam, "?- memberchk([X,X], [a,b,c,[d,e],[d,d]]).", [["X = d"]]);
assert_prolog_success!(&mut wam, "?- memberchk([X,X], [a,b,c,[D,d],[e,e]]).", [["X = d", "D = d"]]);
assert_prolog_failure!(&mut wam, "?- memberchk([X,X], [a,b,c,[e,d],[f,e]]).");
assert_prolog_failure!(&mut wam, "?- memberchk([X,X,Y], [a,b,c,[e,d],[f,e]]).");
assert_prolog_success!(&mut wam, "?- memberchk([X,X,Y], [a,b,c,[e,e,d],[f,e]]).", [["X = e", "Y = d"]]);
// test deep cuts.
submit(&mut wam, "commit :- a, !.");
assert_prolog_failure!(&mut wam, "?- commit.");
submit(&mut wam, "a.");
assert_prolog_success!(&mut wam, "?- commit.");
submit(&mut wam, "commit(X) :- a(X), !.");
assert_prolog_failure!(&mut wam, "?- commit(X).");
submit(&mut wam, "a(x).");
assert_prolog_success!(&mut wam, "?- commit(X).", [["X = x"]]);
submit(&mut wam, "a :- b, !, c. a :- d.");
assert_prolog_failure!(&mut wam, "?- a.");
submit(&mut wam, "b.");
assert_prolog_failure!(&mut wam, "?- a.");
submit(&mut wam, "d.");
// we've committed to the first clause since the query on b
// succeeds, so we expect failure here.
assert_prolog_failure!(&mut wam, "?- a.");
submit(&mut wam, "c.");
assert_prolog_success!(&mut wam, "?- a.");
submit(&mut wam, "a(X) :- b, !, c(X). a(X) :- d(X).");
assert_prolog_failure!(&mut wam, "?- a(X).");
submit(&mut wam, "c(c).");
submit(&mut wam, "d(d).");
assert_prolog_success!(&mut wam, "?- a(X).", [["X = c"]]);
submit(&mut wam, "b.");
assert_prolog_success!(&mut wam, "?- a(X).", [["X = c"]]);
}
#[test]
fn test_queries_on_lists()
{
let mut wam = Machine::new();
submit(&mut wam, "p([Z, W]).");
assert_prolog_success!(&mut wam, "?- p([Z, Z]).", [["Z = _0"]]);
assert_prolog_failure!(&mut wam, "?- p([Z, W, Y]).");
assert_prolog_success!(&mut wam, "?- p([Z | W]).", [["Z = _0", "W = [_3]"]]);
assert_prolog_success!(&mut wam, "?- p([Z | [Z]]).", [["Z = _0"]]);
assert_prolog_success!(&mut wam, "?- p([Z | [W]]).", [["Z = _2", "W = _0"]]);
assert_prolog_failure!(&mut wam, "?- p([Z | []]).");
submit(&mut wam, "p([Z, Z]).");
assert_prolog_success!(&mut wam, "?- p([Z, Z]).", [["Z = _0"]]);
assert_prolog_failure!(&mut wam, "?- p([Z, W, Y]).");
assert_prolog_success!(&mut wam, "?- p([Z | W]).", [["Z = _0", "W = [_0]"]]);
assert_prolog_success!(&mut wam, "?- p([Z | [Z]]).", [["Z = _0"]]);
assert_prolog_success!(&mut wam, "?- p([Z | [W]]).", [["Z = _0", "W = _0"]]);
assert_prolog_failure!(&mut wam, "?- p([Z | []]).");
submit(&mut wam, "p([Z]).");
assert_prolog_failure!(&mut wam, "?- p([Z, Z]).");
assert_prolog_failure!(&mut wam, "?- p([Z, W, Y]).");
assert_prolog_success!(&mut wam, "?- p([Z | W]).", [["W = []", "Z = _0"]]);
assert_prolog_failure!(&mut wam, "?- p([Z | [Z]]).");
assert_prolog_failure!(&mut wam, "?- p([Z | [W]]).");
assert_prolog_success!(&mut wam, "?- p([Z | []]).", [["Z = _0"]]);
submit(&mut wam, "member(X, [X|_]).
member(X, [_|Xs]) :- member(X, Xs).");
assert_prolog_failure!(&mut wam, "?- member(a, [c, [X, Y]]).");
assert_prolog_failure!(&mut wam, "?- member(c, [a, [X, Y]]).");
assert_prolog_success!(&mut wam, "?- member(a, [a, [X, Y]]).", [["X = _2", "Y = _0"]]);
assert_prolog_success!(&mut wam, "?- member(a, [X, Y, Z]).", [["Y = _2", "X = a", "Z = _0"],
["Y = a", "X = _4", "Z = _0"],
["Y = _2", "X = _4", "Z = a"]]);
assert_prolog_success!(&mut wam, "?- member([X, X], [a, [X, Y]]).", [["X = _0", "Y = _0"]]);
assert_prolog_success!(&mut wam, "?- member([X, X], [a, [b, c], [b, b], [Z, x], [d, f]]).",
[["Z = _14", "X = b"],
["Z = x", "X = x"]]);
assert_prolog_failure!(&mut wam, "?- member([X, X], [a, [b, c], [b, d], [foo, x], [d, f]]).");
assert_prolog_success!(&mut wam, "?- member([X, Y], [a, [b, c], [b, b], [Z, x], [d, f]]).",
[["X = b", "Y = c", "Z = _14"],
["X = b", "Y = b", "Z = _14"],
["X = _2", "Y = x", "Z = _2"],
["X = d", "Y = f", "Z = _14"]]);
assert_prolog_failure!(&mut wam, "?- member([X, Y, Y], [a, [b, c], [b, b], [Z, x], [d, f]]).");
assert_prolog_failure!(&mut wam, "?- member([X, Y, Z], [a, [b, c], [b, b], [Z, x], [d, f]]).");
}
#[test]
fn test_queries_on_conjuctive_queries() {
let mut wam = Machine::new();
submit(&mut wam, "p(a, b).");
submit(&mut wam, "q(b, c).");
assert_prolog_success!(&mut wam, "?- p(X, Y), q(Y, Z).", [["X = a", "Z = c", "Y = b"]]);
assert_prolog_failure!(&mut wam, "?- p(X, Y), q(Y, X).");
submit(&mut wam, "p(a, [f(g(X))]).");
submit(&mut wam, "q(Y, c).");
assert_prolog_success!(&mut wam, "?- p(X, Y), q(Y, Z).", [["Y = [f(g(_9))]", "X = a", "Z = c"]]);
assert_prolog_failure!(&mut wam, "?- p(X, Y), q(Y, X).");
submit(&mut wam, "member(X, [X|_]).
member(X, [_|Xs]) :- member(X, Xs).");
assert_prolog_success!(&mut wam, "?- member(X, [a,b,c]), member(X, [a,b,c]).",
[["X = a"],
["X = b"],
["X = c"]]);
assert_prolog_success!(&mut wam, "?- member(X, [a,b,c]), member(X, [b,c]).",
[["X = b"],
["X = c"]]);
assert_prolog_success!(&mut wam, "?- member(X, [a,c]), member(X, [b,c]).",
[["X = c"]]);
assert_prolog_success!(&mut wam, "?- member(X, [a,b,c,d]), !, member(X, [a,d]).",
[["X = a"]]);
assert_prolog_failure!(&mut wam, "?- member(X, [a,b,c,d]), !, member(X, [e]).");
assert_prolog_success!(&mut wam, "?- member([X,X],[a,b,c,[d,d],[e,d]]),
member(X, [a,b,c,d,e,f,g]),
member(Y, [X, a, b, c, d]).",
[["X = d", "Y = d"],
["X = d", "Y = a"],
["X = d", "Y = b"],
["X = d", "Y = c"],
["X = d", "Y = d"]]);
submit(&mut wam, "p(a, [f(g(X))]). p(X, c) :- c.");
submit(&mut wam, "c.");
submit(&mut wam, "q(Y, c).");
assert_prolog_success!(&mut wam, "?- p(X, Y), q(Y, Z).",
[["X = a", "Z = c", "Y = [f(g(_9))]"],
["X = _0", "Z = c", "Y = c"]]);
assert_prolog_success!(&mut wam, "?- p(X, Y), !, q(Y, Z).",
[["Z = c", "Y = [f(g(_9))]", "X = a"]]);
submit(&mut wam, "q([f(g(x))], Z). q([f(g(y))], Y). q([f(g(z))], a).");
assert_prolog_success!(&mut wam, "?- p(X, Y), q(Y, Z).",
[["Z = _11", "X = a", "Y = [f(g(x))]"],
["Z = _11", "X = a", "Y = [f(g(y))]"],
["Z = a", "X = a", "Y = [f(g(z))]"]]);
assert_prolog_success!(&mut wam, "?- p(X, Y), !, q(Y, Z).",
[["X = a", "Y = [f(g(x))]", "Z = _11"],
["X = a", "Y = [f(g(y))]", "Z = _11"],
["X = a", "Y = [f(g(z))]", "Z = a"]]);
assert_prolog_success!(&mut wam, "?- p(X, Y), !, q(Y, X).",
[["X = a", "Y = [f(g(x))]"],
["X = a", "Y = [f(g(y))]"],
["X = a", "Y = [f(g(z))]"]]);
submit(&mut wam, "p(X, [f(g(x))]). p(X, [f(g(y))]). p(X, [f(g(z))]).");
assert_prolog_failure!(&mut wam, "?- q(f(X), Y), p(X, Y).");
assert_prolog_success!(&mut wam, "?- q(X, Y), p(X, Y).",
[["Y = [f(g(x))]", "X = [f(g(x))]"],
["Y = [f(g(y))]", "X = [f(g(x))]"],
["Y = [f(g(z))]", "X = [f(g(x))]"],
["Y = [f(g(x))]", "X = [f(g(y))]"],
["Y = [f(g(y))]", "X = [f(g(y))]"],
["Y = [f(g(z))]", "X = [f(g(y))]"]]);
assert_prolog_success!(&mut wam, "?- p(X, Y), q(X, Y).",
[["Y = [f(g(x))]", "X = [f(g(x))]"],
["Y = [f(g(x))]", "X = [f(g(y))]"],
["Y = [f(g(y))]", "X = [f(g(x))]"],
["Y = [f(g(y))]", "X = [f(g(y))]"],
["Y = [f(g(z))]", "X = [f(g(x))]"],
["Y = [f(g(z))]", "X = [f(g(y))]"]]);
assert_prolog_success!(&mut wam, "?- p(X, Y), q(Y, X).",
[["Y = [f(g(x))]", "X = _10"],
["Y = [f(g(y))]", "X = _10"],
["Y = [f(g(z))]", "X = a"]]);
assert_prolog_success!(&mut wam, "?- q(X, Y), p(Y, X).",
[["Y = _9", "X = [f(g(x))]"],
["Y = _9", "X = [f(g(y))]"],
["Y = a" , "X = [f(g(z))]"]]);
}
#[test]
fn test_queries_on_call_n()
{
let mut wam = Machine::new();
submit(&mut wam, "maplist(_, []).
maplist(P, [X|Xs]) :- call(P, X), maplist(P, Xs).");
submit(&mut wam, "f(a). f(b). f(c).");
assert_prolog_success!(&mut wam, "?- maplist(f, [X,Y,Z]).",
[["X = a", "Y = a", "Z = a"],
["X = a", "Y = a", "Z = b"],
["X = a", "Y = a", "Z = c"],
["X = a", "Y = b", "Z = a"],
["X = a", "Y = b", "Z = b"],
["X = a", "Y = b", "Z = c"],
["X = a", "Y = c", "Z = a"],
["X = a", "Y = c", "Z = b"],
["X = a", "Y = c", "Z = c"],
["X = b", "Y = a", "Z = a"],
["X = b", "Y = a", "Z = b"],
["X = b", "Y = a", "Z = c"],
["X = b", "Y = b", "Z = a"],
["X = b", "Y = b", "Z = b"],
["X = b", "Y = b", "Z = c"],
["X = b", "Y = c", "Z = a"],
["X = b", "Y = c", "Z = b"],
["X = b", "Y = c", "Z = c"],
["X = c", "Y = a", "Z = a"],
["X = c", "Y = a", "Z = b"],
["X = c", "Y = a", "Z = c"],
["X = c", "Y = b", "Z = a"],
["X = c", "Y = b", "Z = b"],
["X = c", "Y = b", "Z = c"],
["X = c", "Y = c", "Z = a"],
["X = c", "Y = c", "Z = b"],
["X = c", "Y = c", "Z = c"]]);
assert_prolog_success!(&mut wam, "?- maplist(f, [a,Y,Z]).",
[["Y = a", "Z = a"],
["Y = a", "Z = b"],
["Y = a", "Z = c"],
["Y = b", "Z = a"],
["Y = b", "Z = b"],
["Y = b", "Z = c"],
["Y = c", "Z = a"],
["Y = c", "Z = b"],
["Y = c", "Z = c"]]);
assert_prolog_success!(&mut wam, "?- maplist(f, [X,a,b]).",
[["X = a"],
["X = b"],
["X = c"]]);
assert_prolog_success!(&mut wam, "?- maplist(f, [c,a,b]).");
assert_prolog_failure!(&mut wam, "?- maplist(f, [d,e,f]).");
assert_prolog_success!(&mut wam, "?- maplist(f, []).");
assert_prolog_failure!(&mut wam, "?- maplist(f(X), [a,b,c]).");
submit(&mut wam, "f(X) :- call(X), call(X).");
submit(&mut wam, "p(x). p(y).");
assert_prolog_failure!(&mut wam, "?- f(p).");
assert_prolog_success!(&mut wam, "?- f(p(X)).", [["X = x"],
["X = y"]]);
assert_prolog_success!(&mut wam, "?- f(p(x)).");
assert_prolog_failure!(&mut wam, "?- f(p(w)).");
assert_prolog_failure!(&mut wam, "?- f(p(X, Y)).");
submit(&mut wam, "f(P) :- call(P, X), call(P, Y).");
assert_prolog_success!(&mut wam, "?- f(p).");
assert_prolog_failure!(&mut wam, "?- f(non_existent).");
submit(&mut wam, "f(P, X, Y) :- call(P, X), call(P, Y).");
assert_prolog_success!(&mut wam, "?- f(p, X, Y).", [["Y = x", "X = x"],
["Y = y", "X = x"],
["Y = x", "X = y"],
["Y = y", "X = y"]]);
assert_prolog_success!(&mut wam, "?- f(p, x, Y).", [["Y = x"],
["Y = y"]]);
assert_prolog_success!(&mut wam, "?- f(p, X, y).", [["X = x"],
["X = y"]]);
assert_prolog_success!(&mut wam, "?- f(p, x, y).");
assert_prolog_failure!(&mut wam, "?- f(p, X, z).");
assert_prolog_failure!(&mut wam, "?- f(p, z, Y).");
assert_prolog_success!(&mut wam, "?- call(p, X).", [["X = x"],
["X = y"]]);
assert_prolog_success!(&mut wam, "?- call(p, x).");
assert_prolog_success!(&mut wam, "?- call(p, y).");
assert_prolog_failure!(&mut wam, "?- call(p, z).");
submit(&mut wam, "r(f(X)) :- p(X). r(g(Y)) :- p(Y).");
assert_prolog_success!(&mut wam, "?- f(r, X, Y).",
[["X = f(x)", "Y = f(x)"],
["X = f(x)", "Y = f(y)"],
["X = f(x)", "Y = g(x)"],
["X = f(x)", "Y = g(y)"],
["X = f(y)", "Y = f(x)"],
["X = f(y)", "Y = f(y)"],
["X = f(y)", "Y = g(x)"],
["X = f(y)", "Y = g(y)"],
["X = g(x)", "Y = f(x)"],
["X = g(x)", "Y = f(y)"],
["X = g(x)", "Y = g(x)"],
["X = g(x)", "Y = g(y)"],
["X = g(y)", "Y = f(x)"],
["X = g(y)", "Y = f(y)"],
["X = g(y)", "Y = g(x)"],
["X = g(y)", "Y = g(y)"]]);
assert_prolog_success!(&mut wam, "?- f(r, X, X).",
[["X = f(x)"],
["X = f(y)"],
["X = g(x)"],
["X = g(y)"]]);
assert_prolog_success!(&mut wam, "?- f(r, f(X), g(Y)).",
[["X = x", "Y = x"],
["X = x", "Y = y"],
["X = y", "Y = x"],
["X = y", "Y = y"]]);
assert_prolog_failure!(&mut wam, "?- f(r, j(X), h(Y)).");
submit(&mut wam, "p(one, one). p(one, two). p(two, two).");
assert_prolog_success!(&mut wam, "?- f(p(one), X, Y).",
[["X = one", "Y = one"],
["X = one", "Y = two"],
["X = two", "Y = one"],
["X = two", "Y = two"]]);
assert_prolog_success!(&mut wam, "?- f(p(one), X, X).",
[["X = one"],
["X = two"]]);
assert_prolog_success!(&mut wam, "?- f(p(one), one, Y).",
[["Y = one"],
["Y = two"]]);
assert_prolog_success!(&mut wam, "?- f(p(one), one, two).");
assert_prolog_failure!(&mut wam, "?- f(p(one), one, three).");
assert_prolog_failure!(&mut wam, "?- f(p(two), one, two).");
assert_prolog_failure!(&mut wam, "?- f(p(two), two, one).");
assert_prolog_success!(&mut wam, "?- f(p(two), two, two).");
assert_prolog_failure!(&mut wam, "?- f(p(two), two, three).");
assert_prolog_failure!(&mut wam, "?- f(p(three), X, Y).");
assert_prolog_failure!(&mut wam, "?- f(p(three), X, X).");
assert_prolog_failure!(&mut wam, "?- f(p(three), one, Y).");
assert_prolog_failure!(&mut wam, "?- f(p(three), one, two).");
assert_prolog_failure!(&mut wam, "?- f(p(three), one, three).");
submit(&mut wam, "f(P, X) :- call(P, X).");
assert_prolog_success!(&mut wam, "?- f(p(one), one).");
assert_prolog_success!(&mut wam, "?- f(p(two), two).");
assert_prolog_failure!(&mut wam, "?- f(p(two), one).");
assert_prolog_failure!(&mut wam, "?- f(p(three), one).");
assert_prolog_failure!(&mut wam, "?- f(p(one), three).");
assert_prolog_failure!(&mut wam, "?- f(p(two), three).");
submit(&mut wam, "p(f(g(X)), compound, [lists,are,good]).");
assert_prolog_success!(&mut wam, "?- call(p(f(g(X))), Y, Z).",
[["Y = compound", "Z = [lists, are, good]", "X = _3"]]);
submit(&mut wam, "david_lynch(coffee).
david_lynch(pie).
david_lynch(kyle(Film)) :- kyle(Film).");
submit(&mut wam, "kyle(dune).
kyle(blue_velvet).
kyle(showgirls).
kyle(flintstones).");
assert_prolog_success!(&mut wam, "?- call(david_lynch, X).",
[["X = coffee"],
["X = pie"],
["X = kyle(dune)"],
["X = kyle(blue_velvet)"],
["X = kyle(showgirls)"],
["X = kyle(flintstones)"]]);
assert_prolog_success!(&mut wam, "?- call(david_lynch, kyle(Film)).",
[["Film = dune"],
["Film = blue_velvet"],
["Film = showgirls"],
["Film = flintstones"]]);
assert_prolog_failure!(&mut wam, "?- call(david_lynch, kyle(Film), _).");
submit(&mut wam, "call_mult(P, X) :- call(call(P), X).");
assert_prolog_success!(&mut wam, "?- call_mult(p(X), Y).",
[["Y = one", "X = one"],
["Y = two", "X = one"],
["Y = two", "X = two"]]);
assert_prolog_success!(&mut wam, "?- call_mult(p(X), X).",
[["X = one"],
["X = two"]]);
assert_prolog_success!(&mut wam, "?- call_mult(p(one), X).",
[["X = one"],
["X = two"]]);
assert_prolog_success!(&mut wam, "?- call_mult(p(X), one).",
[["X = one"]]);
assert_prolog_failure!(&mut wam, "?- call_mult(p(two), one).");
assert_prolog_success!(&mut wam, "?- call_mult(p(two), two).");
assert_prolog_success!(&mut wam, "?- call(call(p(one)), X), call(call(p(two)), two).",
[["X = one"],
["X = two"]]);
assert_prolog_success!(&mut wam, "?- call(call(p(one, X))), call(call(p(two, two))).",
[["X = one"],
["X = two"]]);
assert_prolog_failure!(&mut wam, "?- call(call(p(one)), X), call(call(p(two)), one).");
assert_prolog_success!(&mut wam, "?- call(call(p(X)), X), call(call(p(Y)), Y).",
[["X = one", "Y = one"],
["X = one", "Y = two"],
["X = two", "Y = one"],
["X = two", "Y = two"]]);
assert_prolog_success!(&mut wam, "?- call(call(p(X)), Y), call(call(p(Y)), X).",
[["X = one", "Y = one"],
["X = two", "Y = two"]]);
assert_prolog_success!(&mut wam, "?- call(call(p), X, Y), call(call(call(p)), X, Y).",
[["X = one", "Y = one"],
["Y = two", "X = one"],
["Y = two", "X = two"]]);
assert_prolog_success!(&mut wam, "?- call(call(p), X, Y), call(call(call(p(X))), Y).",
[["X = one", "Y = one"],
["Y = two", "X = one"],
["Y = two", "X = two"]]);
assert_prolog_failure!(&mut wam, "?- call(call(p), X, Y), call(call(call(p(X))), X, Y).");
assert_prolog_success!(&mut wam, "?- call(call(p), X, Y), call(call(call(p(X))), X).",
[["X = one", "Y = one"],
["Y = two", "X = one"],
["Y = two", "X = two"]]);
submit(&mut wam, "f(call(f, undefined)). f(undefined).");
submit(&mut wam, "call_var(P) :- P.");
assert_prolog_success!(&mut wam, "?- f(X), call_var(X).",
[["X = call(f, undefined)"]]);
assert_prolog_success!(&mut wam, "?- f(call(f, Q)), call_var(call(f, Q)).",
[["Q = undefined"]]);
assert_prolog_failure!(&mut wam, "?- call_var(call(undefined, Q)).");
assert_prolog_failure!(&mut wam, "?- call(call).");
assert_prolog_failure!(&mut wam, "?- call(call(call)).");
assert_prolog_failure!(&mut wam, "?- call(call(call(call))).");
assert_prolog_failure!(&mut wam, "?- call(call(call(call(call)))).");
assert_prolog_failure!(&mut wam, "?- call(call(call(call(call(call))))).");
assert_prolog_success!(&mut wam, "?- call(call(call(call(call(call(p(X))))))).",
[["X = x"],
["X = y"]]);
}
#[test]
fn test_queries_on_arithmetic()
{
let mut wam = Machine::new();
assert_prolog_success!(&mut wam, "?- X is 1, X is X.", [["X = 1"]]);
assert_prolog_failure!(&mut wam, "?- X is 1, X is X + 1.");
assert_prolog_success!(&mut wam, "?- X is 1, X is X + 0.", [["X = 1"]]);
assert_prolog_success!(&mut wam, "?- X is 1, X is X * 1.", [["X = 1"]]);
assert_prolog_failure!(&mut wam, "?- X is 1, X is X * 2.");
// assert_prolog_failure!(&mut wam, "?- X is 1 + a.");
// assert_prolog_failure!(&mut wam, "?- X is 1 + Y.");
assert_prolog_success!(&mut wam, "?- Y is 2 + 2 - 2, X is 1 + Y, X = 3.",
[["X = 3", "Y = 2"]]);
assert_prolog_failure!(&mut wam, "?- Y is 2 + 2 - 2, X is 1 + Y, X = 2.");
assert_prolog_success!(&mut wam, "?- 6 is 6.");
assert_prolog_success!(&mut wam, "?- 6 is 3 + 3.");
assert_prolog_success!(&mut wam, "?- 6 is 3 * 2.");
assert_prolog_failure!(&mut wam, "?- 7 is 3 * 2.");
assert_prolog_failure!(&mut wam, "?- 7 is 3.5 * 2.");
assert_prolog_success!(&mut wam, "?- 7.0 is 3.5 * 2.");
assert_prolog_success!(&mut wam, "?- 7.0 is 14 / 2.");
assert_prolog_failure!(&mut wam, "?- 4.666 is 14.0 / 3.");
assert_prolog_success!(&mut wam, "?- 4.0 is 8.0 / 2.");
submit(&mut wam, "f(X) :- X is 5 // 0.");
assert_prolog_success!(&mut wam, "?- catch(f(X), error(evaluation_error(E), _), true), E = zero_divisor.",
[["E = zero_divisor", "X = _1"]]);
submit(&mut wam, "f(X) :- X is (5 rdiv 1) / 0.");
assert_prolog_success!(&mut wam, "?- catch(f(X), error(evaluation_error(E), _), true), E = zero_divisor.",
[["E = zero_divisor", "X = _1"]]);
submit(&mut wam, "f(X) :- X is 5.0 / 0.");
assert_prolog_success!(&mut wam, "?- catch(f(X), error(evaluation_error(E), _), true), E = zero_divisor.",
[["E = zero_divisor", "X = _1"]]);
assert_prolog_success!(&mut wam, "?- X is ((3 + 4) // 2) + 2 - 1 // 1, Y is 2+2, Z is X+Y.",
[["Y = 4", "X = 4", "Z = 8"]]);
assert_prolog_success!(&mut wam, "?- X is ((3 + 4) // 2) + 2 - 1 // 1, Y is 2+2, Z = 8, Y is 4.",
[["Y = 4", "X = 4", "Z = 8"]]);
assert_prolog_success!(&mut wam, "?- X is (3 rdiv 4) / 2, Y is 3 rdiv 8, X = Y.",
[["X = 3/8", "Y = 3/8"]]);
assert_prolog_success!(&mut wam, "?- X is 10 xor -4, X is -10.", [["X = -10"]]);
assert_prolog_success!(&mut wam, "?- X is 4 xor -7, X is -3.", [["X = -3"]]);
assert_prolog_success!(&mut wam, "?- X is 10 xor 5 + 55, X = 70.", [["X = 70"]]);
assert_prolog_success!(&mut wam, "?- X is 10 rem -3, X = 1.", [["X = 1"]]);
assert_prolog_success!(&mut wam, "?- X is 10 mod -3, X is -2.", [["X = -2"]]);
assert_prolog_success!(&mut wam, "?- call(is, X, 3 + 4).", [["X = 7"]]);
assert_prolog_success!(&mut wam, "?- Y is 3 + 3, call(is, X, Y + 4).", [["Y = 6", "X = 10"]]);
assert_prolog_success!(&mut wam, "?- call(is, X, 3 + 4.5).", [["X = 7.5"]]);
assert_prolog_success!(&mut wam, "?- X is 2 rdiv 3, call(is, Y, X*X).", [["X = 2/3", "Y = 4/9"]]);
assert_prolog_failure!(&mut wam, "?- call(>, 3, 3 + 3).");
assert_prolog_failure!(&mut wam, "?- X is 3 + 3, call(>, 3, X).");
assert_prolog_success!(&mut wam, "?- X is 3 + 3, call(<, 3, X).", [["X = 6"]]);
assert_prolog_success!(&mut wam, "?- X is 3 + 3, X =:= 3 + 3.", [["X = 6"]]);
assert_prolog_success!(&mut wam, "?- catch(call(is, X, 3 // 0), error(E, _), true).",
[["X = _5", "E = evaluation_error(zero_divisor)"]]);
assert_prolog_success!(&mut wam, "?- catch(call(is, X, 3 // 3), _, true).", [["X = 1"]]);
submit(&mut wam, "f(X, Sum) :- ( integer(X) -> Sum is X + X * X + 3 ;
var(X) -> Sum = 1, X = 1 ).");
assert_prolog_success!(&mut wam, "?- f(X, Sum).", [["X = 1", "Sum = 1"]]);
assert_prolog_success!(&mut wam, "?- f(5, Sum).", [["Sum = 33"]]);
assert_prolog_success!(&mut wam, "?- f(5, 33).");
assert_prolog_failure!(&mut wam, "?- f(5, 32).");
// exponentiation.
// the ~ operators tests whether |X - Y| <= 1/10000...
// or whatever degree of approximation used by Newton's method in rational_pow.
submit(&mut wam, ":- op(900, xfx, ~).");
submit(&mut wam, "X ~ Y :- abs(X - Y) =< 1 rdiv 10000.");
assert_prolog_success!(&mut wam, "?- X is 3 ^ 3.",
[["X = 27"]]);
assert_prolog_success!(&mut wam, "?- X is 3 ^ 0.",
[["X = 1"]]);
assert_prolog_success!(&mut wam, "?- X is 3 ^ -0.",
[["X = 1"]]);
assert_prolog_success!(&mut wam, "?- X is 3 ^ 1.",
[["X = 3"]]);
assert_prolog_success!(&mut wam, "?- X is 3 ^ -3.",
[["X = 1/27"]]);
assert_prolog_success!(&mut wam, "?- X is (-3) ^ 3.",
[["X = -27"]]);
assert_prolog_success!(&mut wam, "?- X is (-3) ^ 3.",
[["X = -27"]]);
assert_prolog_success!(&mut wam, "?- X is (-3) ^ 0.",
[["X = 1"]]);
assert_prolog_success!(&mut wam, "?- X is (-3) ^ -0.",
[["X = 1"]]);
assert_prolog_success!(&mut wam, "?- X is (-3) ^ 1.",
[["X = -3"]]);
assert_prolog_success!(&mut wam, "?- X is (-3) ^ -3.",
[["X = -1/27"]]);
assert_prolog_success!(&mut wam, "?- X is (1 rdiv 27) ^ -3, X ~ 19683.");
assert_prolog_success!(&mut wam, "?- X is (-1 rdiv 27) ^ -3, X ~ -19683.");
assert_prolog_success!(&mut wam, "?- X is 0.0 ^ 0.",
[["X = 1"]]);
assert_prolog_success!(&mut wam, "?- catch(_ is 0.0 ^ -2342, error(E, _), true).",
[["E = evaluation_error(no_roots)"]]);
assert_prolog_success!(&mut wam, "?- X is 0.0 ^ 2342.",
[["X = 0"]]);
assert_prolog_success!(&mut wam, "?- catch(_ is (-3) ^ (1 rdiv 2), error(E, _), true).",
[["E = evaluation_error(no_roots)"]]);
assert_prolog_success!(&mut wam, "?- catch(_ is (-3/2) ^ (1 rdiv 2), error(E, _), true).",
[["E = evaluation_error(no_roots)"]]);
assert_prolog_success!(&mut wam, "?- catch(_ is (-3 rdiv 2) ^ (1 rdiv 4), error(E, _), true).",
[["E = evaluation_error(no_roots)"]]);
assert_prolog_success!(&mut wam, "?- catch(_ is (-3 rdiv 2) ^ (-1 rdiv 4), error(E, _), true).",
[["E = evaluation_error(no_roots)"]]);
assert_prolog_success!(&mut wam, "?- catch(_ is 0 ^ (-5 rdiv 4), error(E, _), true).",
[["E = evaluation_error(no_roots)"]]);
assert_prolog_success!(&mut wam, "?- X is 3 ^ (1 rdiv 3), Y is X ^ 3, Y ~ 3.");
assert_prolog_success!(&mut wam, "?- X is (-3) ^ (1 rdiv 3), Y is X ^ 3, Y ~ -3.");
assert_prolog_failure!(&mut wam, "?- X is (-5) ^ (1 rdiv 3), Y is X ^ 3, Y ~ -3.");
assert_prolog_failure!(&mut wam, "?- X is 5 ^ (1 rdiv 3), Y is X ^ 3, Y ~ 3.");
assert_prolog_failure!(&mut wam, "?- X is (1 rdiv 3) ^ 0.5, Y is X ^ 2, X ~ Y.");
assert_prolog_success!(&mut wam, "?- X is (1 rdiv 3) ^ 0.5, Y is X ^ 2, 1 rdiv 3 ~ Y.");
assert_prolog_success!(&mut wam, "?- X is (-5) ^ (-1 rdiv 3), Y is X ^ 3, Y ~ -1 rdiv 5.");
assert_prolog_failure!(&mut wam, "?- X is (-5) ^ (-1 rdiv 3), Y is X ^ 3, Y ~ 1 rdiv 5.");
assert_prolog_success!(&mut wam, "?- X is (0 rdiv 5) ^ 5.",
[["X = 0"]]);
assert_prolog_success!(&mut wam, "?- X is (-0 rdiv 5) ^ 5.",
[["X = 0"]]);
assert_prolog_success!(&mut wam, "?- X is (0 rdiv 5) ^ 0.",
[["X = 1"]]);
assert_prolog_success!(&mut wam, "?- catch(_ is (0 rdiv 0) ^ 5, error(E, _), true).",
[["E = evaluation_error(zero_divisor)"]]);
}
#[test]
fn test_queries_on_exceptions()
{
let mut wam = Machine::new();
submit(&mut wam, "f(a). f(_) :- throw(stuff).");
submit(&mut wam, "handle(stuff).");
assert_prolog_success!(&mut wam, "?- catch(f(X), E, handle(E)).",
[["E = _2", "X = a"],
["E = stuff", "X = _1"]]);
submit(&mut wam, "f(a). f(X) :- g(X).");
submit(&mut wam, "g(x). g(y). g(z).");
submit(&mut wam, "handle(x). handle(y).");
assert_prolog_success!(&mut wam, "?- catch(f(X), X, handle(X)).",
[["X = a"],
["X = x"],
["X = y"],
["X = z"]]);
assert_prolog_success!(&mut wam, "?- catch(f(a), _, handle(X)).",
[["X = _4"]]);
assert_prolog_failure!(&mut wam, "?- catch(f(b), _, handle(X)).");
submit(&mut wam, "g(x). g(X) :- throw(x).");
assert_prolog_success!(&mut wam, "?- catch(f(X), x, handle(X)).",
[["X = a"],
["X = x"],
["X = x"],
["X = y"]]);
assert_prolog_success!(&mut wam, "?- catch(f(X), x, handle(z)).",
[["X = a"],
["X = x"]]);
assert_prolog_success!(&mut wam, "?- catch(f(z), x, handle(x)).");
assert_prolog_success!(&mut wam, "?- catch(f(z), x, handle(y)).");
assert_prolog_failure!(&mut wam, "?- catch(f(z), x, handle(z)).");
submit(&mut wam, "f(X) :- throw(stuff).");
submit(&mut wam, "handle(stuff). handle(other_stuff).");
// the first 3 cases should deterministically succeed.
assert_prolog_success!(&mut wam, "?- catch(f(X), E, handle(E)).",
[["X = _1", "E = stuff"]]);
assert_prolog_success!(&mut wam, "?- catch(f(X), E, handle(stuff)).",
[["X = _1", "E = stuff"]]);
assert_prolog_success!(&mut wam, "?- catch(f(X), E, handle(other_stuff)).",
[["X = _1", "E = stuff"]]);
assert_prolog_failure!(&mut wam, "?- catch(f(X), E, handle(not_stuff)).");
submit(&mut wam, "f(success). f(X) :- catch(g(X), E, handle(E)).");
submit(&mut wam, "g(g_success). g(g_success_2). g(X) :- throw(X).");
submit(&mut wam, "handle(x). handle(y). handle(z).");
assert_prolog_success!(&mut wam, "?- catch(f(X), E, E).",
[["X = success", "E = _2"],
["X = g_success", "E = _2"],
["X = g_success_2", "E = _2"],
["X = _1", "E = _2"],
["X = _1", "E = _2"],
["X = _1", "E = _2"]]);
assert_prolog_failure!(&mut wam, "?- catch(f(fail), _, _).");
assert_prolog_success!(&mut wam, "?- catch(f(x), _, _).");
assert_prolog_success!(&mut wam, "?- catch(f(y), _, _).");
assert_prolog_success!(&mut wam, "?- catch(f(z), _, _).");
submit(&mut wam, "f(success). f(E) :- catch(g(E), E, handle(E)).");
submit(&mut wam, "g(g_success). g(g_success_2). g(X) :- throw(X).");
submit(&mut wam, "handle(x). handle(y). handle(z). handle(v) :- throw(X).");
assert_prolog_success!(&mut wam, "?- catch(f(X), E, E).",
[["X = success", "E = _2"],
["X = g_success", "E = _2"],
["X = g_success_2", "E = _2"],
["X = x", "E = _2"],
["X = y", "E = _2"],
["X = z", "E = _2"]]);
submit(&mut wam, "handle(x). handle(y). handle(z). handle(v) :- throw(handle_top(X)).");
submit(&mut wam, "handle_top(an_error_1). handle_top(an_error_2).");
assert_prolog_success!(&mut wam, "?- catch(f(X), E, E).",
[["X = success", "E = _2"],
["X = g_success", "E = _2"],
["X = g_success_2", "E = _2"],
["X = x", "E = _2"],
["X = y", "E = _2"],
["X = z", "E = _2"],
["X = _1", "E = handle_top(an_error_1)"],
["X = _1", "E = handle_top(an_error_2)"]]);
submit(&mut wam, "handle(x). handle(y). handle(z). handle(v) :- throw(X).");
assert_prolog_success!(&mut wam, "?- catch(f(X), E, handle_top(E)).",
[["X = success", "E = _2"],
["X = g_success", "E = _2"],
["X = g_success_2", "E = _2"],
["X = x", "E = _2"],
["X = y", "E = _2"],
["X = z", "E = _2"],
["E = an_error_1", "X = _1"],
["E = an_error_2", "X = _1"]]);
}
#[test]
fn test_queries_on_skip_max_list() {
let mut wam = Machine::new();
// test on proper and empty lists.
assert_prolog_success!(&mut wam, "?- '$skip_max_list'(N, 5, [], Xs).",
[["Xs = []", "N = 0"]]);
assert_prolog_success!(&mut wam, "?- '$skip_max_list'(N, 5, [a,b,c], Xs).",
[["Xs = []", "N = 3"]]);
assert_prolog_success!(&mut wam, "?- '$skip_max_list'(N, 2, [a,b,c], Xs).",
[["Xs = [c]", "N = 2"]]);
assert_prolog_success!(&mut wam, "?- '$skip_max_list'(N, 3, [a,b,c], Xs).",
[["Xs = []", "N = 3"]]);
assert_prolog_success!(&mut wam, "?- '$skip_max_list'(N, 0, [], Xs).",
[["Xs = []", "N = 0"]]);
assert_prolog_success!(&mut wam, "?- '$skip_max_list'(N, 0, [a,b,c], Xs).",
[["Xs = [a, b, c]", "N = 0"]]);
assert_prolog_success!(&mut wam, "?- '$skip_max_list'(N, 0, [a,b,c], Xs).",
[["Xs = [a, b, c]", "N = 0"]]);
assert_prolog_success!(&mut wam, "?- '$skip_max_list'(N, 0, [a,b,c], Xs).",
[["Xs = [a, b, c]", "N = 0"]]);
assert_prolog_failure!(&mut wam, "?- '$skip_max_list'(4, 0, [], Xs).");
assert_prolog_failure!(&mut wam, "?- '$skip_max_list'(3, 0, [a,b,c], Xs).");
assert_prolog_failure!(&mut wam, "?- '$skip_max_list'(2, 0, [a,b,c], Xs).");
assert_prolog_failure!(&mut wam, "?- '$skip_max_list'(1, 0, [a,b,c], Xs).");
assert_prolog_success!(&mut wam, "?- '$skip_max_list'(0, 5, [], Xs).",
[["Xs = []"]]);
assert_prolog_success!(&mut wam, "?- '$skip_max_list'(3, 5, [a,b,c], Xs).",
[["Xs = []"]]);
assert_prolog_success!(&mut wam, "?- '$skip_max_list'(2, 2, [a,b,c], Xs).",
[["Xs = [c]"]]);
assert_prolog_success!(&mut wam, "?- '$skip_max_list'(3, 3, [a,b,c], Xs).",
[["Xs = []"]]);
// tests on proper and empty lists with no max.
// test on proper and empty lists.
assert_prolog_success!(&mut wam, "?- '$skip_max_list'(N, -1, [], Xs).",
[["Xs = []", "N = 0"]]);
assert_prolog_success!(&mut wam, "?- '$skip_max_list'(N, -1, [a,b,c], Xs).",
[["Xs = []", "N = 3"]]);
assert_prolog_success!(&mut wam, "?- '$skip_max_list'(N, -1, [], Xs).",
[["Xs = []", "N = 0"]]);
assert_prolog_failure!(&mut wam, "?- '$skip_max_list'(4, -1, [], Xs).");
assert_prolog_success!(&mut wam, "?- '$skip_max_list'(3, -1, [a,b,c], Xs).",
[["Xs = []"]]);
assert_prolog_success!(&mut wam, "?- '$skip_max_list'(0, -1, [], Xs).",
[["Xs = []"]]);
assert_prolog_success!(&mut wam, "?- '$skip_max_list'(3, -1, [a,b,c], Xs).",
[["Xs = []"]]);
// tests on partial lists.
assert_prolog_success!(&mut wam, "?- '$skip_max_list'(3, 4, [a,b,c|X], Xs0).",
[["X = _1", "Xs0 = _1"]]);
assert_prolog_success!(&mut wam, "?- '$skip_max_list'(3, 3, [a,b,c|X], Xs0).",
[["X = _1", "Xs0 = _1"]]);
assert_prolog_failure!(&mut wam, "?- '$skip_max_list'(3, 2, [a,b,c|X], Xs0).");
assert_prolog_failure!(&mut wam, "?- '$skip_max_list'(3, 1, [a,b,c|X], Xs0).");
assert_prolog_failure!(&mut wam, "?- '$skip_max_list'(3, 0, [a,b,c|X], Xs0).");
// tests on cyclic lists.
assert_prolog_failure!(&mut wam, "?- Xs = [a,b|Xs], '$skip_max_list'(3, 5, X, Xs0).");
assert_prolog_failure!(&mut wam, "?- X = [a,b|Y], Y = [c,d|X], '$skip_max_list'(4, 5, X, Xs0).");
assert_prolog_failure!(&mut wam, "?- X = [a,b|Y], Y = [c,d|X], '$skip_max_list'(4, 3, X, Xs0).");
// tests on non lists.
assert_prolog_success!(&mut wam, "?- '$skip_max_list'(N, 9, non_list, Xs).",
[["Xs = non_list", "N = 0"]]);
}
#[test]
fn test_queries_on_conditionals()
{
let mut wam = Machine::new();
submit(&mut wam, "test(A) :- ( A =:= 2 -> writeq(\"A is 2\")
; A =:= 3 -> writeq(\"A is 3\")
; A = \"not 2 or 3\"
).");
assert_prolog_success!(&mut wam, "?- catch(test(A), error(instantiation_error, _), true).");
assert_prolog_success!(&mut wam, "?- A = 2, test(A).", [["A = 2"]]);
assert_prolog_success!(&mut wam, "?- A = 3, test(A), B = 3, test(B).", [["A = 3", "B = 3"]]);
submit(&mut wam, "f(a). f(b).");
submit(&mut wam, "g(1). g(2). g(3).");
submit(&mut wam, "typed_dispatch(X) :- ( var(X) -> f(X)
; integer(X) -> g(X)
; atomic(X)).");
assert_prolog_success!(&mut wam, "?- typed_dispatch(X).", [["X = a"], ["X = b"]]);
assert_prolog_success!(&mut wam, "?- typed_dispatch(a).");
assert_prolog_success!(&mut wam, "?- typed_dispatch(b).");
assert_prolog_success!(&mut wam, "?- typed_dispatch(c).");
assert_prolog_success!(&mut wam, "?- typed_dispatch(1).");
assert_prolog_success!(&mut wam, "?- typed_dispatch(2).");
assert_prolog_success!(&mut wam, "?- typed_dispatch(3).");
assert_prolog_failure!(&mut wam, "?- typed_dispatch(4).");
assert_prolog_failure!(&mut wam, "?- typed_dispatch(5).");
assert_prolog_failure!(&mut wam, "?- typed_dispatch(compound(term)).");
submit(&mut wam, "f(a). f(b). f(compound(term)).");
submit(&mut wam, "g(X, Y) :- f(X), (atomic(X) -> X = a ; X = a ; X = compound(Y)).");
assert_prolog_success!(&mut wam, "?- g(X, Y).",
[["Y = _1", "X = a"],
["Y = term", "X = compound(term)"]]);
assert_prolog_success!(&mut wam, "?- g(X, X).", [["X = a"]]);
assert_prolog_success!(&mut wam, "?- g(compound(X), X).", [["X = term"]]);
assert_prolog_success!(&mut wam, "?- g(X, term).", [["X = a"], ["X = compound(term)"]]);
assert_prolog_success!(&mut wam, "?- g(a, _).");
assert_prolog_success!(&mut wam, "?- g(X, _), X = a.", [["X = a"]]);
submit(&mut wam, "g(X) :- var(X) -> (var(X) -> X is 3 + 3 ; X = not_6).");
assert_prolog_success!(&mut wam, "?- g(X).", [["X = 6"]]);
assert_prolog_failure!(&mut wam, "?- g(1).");
assert_prolog_failure!(&mut wam, "?- g(6).");
assert_prolog_failure!(&mut wam, "?- g(not_6).");
assert_prolog_success!(&mut wam, "?- f(X), (g(Y), !).", [["X = a", "Y = 6"]]);
submit(&mut wam, "test(X, [X]) :- (atomic(X) -> true ; throw(type_error(atomic_expected, X))).
test(_, _).");
assert_prolog_success!(&mut wam, "?- catch(test(a, [a]), type_error(E), true).",
[["E = _6"], ["E = _6"]]);
assert_prolog_success!(&mut wam, "?- f(X), call(->, atomic(X), true).",
[["X = a"], ["X = b"]]);
}
#[test]
fn test_queries_on_modules()
{
let mut wam = Machine::new();
wam.use_module_in_toplevel(clause_name!("lists"));
compile_user_module(&mut wam, "
:- module(my_lists, [local_member/2, reverse/2]).
:- use_module(library(lists), [member/2]).
local_member(X, Xs) :- member(X, Xs).
reverse(Xs, Ys) :- lists:reverse(Xs, Ys).
");
assert_prolog_success!(&mut wam, "?- my_lists:local_member(1, [1,2,3]).");
assert_prolog_success!(&mut wam, "?- my_lists:reverse([a,b,c], [c,b,a]).");
compile_user_module(&mut wam, "
:- use_module(library(my_lists), [local_member/2]).
:- module(my_lists_2, [local_member/2]).
");
assert_prolog_success!(&mut wam, "?- my_lists_2:local_member(1, [1,2,3]).");
assert_prolog_success!(&mut wam, "?- catch(local_member(X, Xs), error(E, _), true).",
[["X = _1", "E = existence_error(procedure, local_member/2)", "Xs = _2"]]);
}
#[test]
fn test_queries_on_builtins()
{
let mut wam = Machine::new();
wam.use_module_in_toplevel(clause_name!("lists"));
wam.use_module_in_toplevel(clause_name!("control"));
assert_prolog_failure!(&mut wam, "?- atom(X).");
assert_prolog_success!(&mut wam, "?- atom(a).");
assert_prolog_failure!(&mut wam, "?- atom(\"string\").");
assert_prolog_failure!(&mut wam, "?- atom([]).");
assert_prolog_failure!(&mut wam, "?- atom(1).");
assert_prolog_failure!(&mut wam, "?- atom(0).");
assert_prolog_failure!(&mut wam, "?- atom(0.0).");
assert_prolog_failure!(&mut wam, "?- atom([a,b,c]).");
assert_prolog_failure!(&mut wam, "?- atom(atop(the_trees)).");
assert_prolog_failure!(&mut wam, "?- atomic(X).");
assert_prolog_success!(&mut wam, "?- atomic(a).");
assert_prolog_success!(&mut wam, "?- atomic(\"string\").");
assert_prolog_success!(&mut wam, "?- atomic([]).");
assert_prolog_success!(&mut wam, "?- atomic(1).");
assert_prolog_success!(&mut wam, "?- atomic(0).");
assert_prolog_success!(&mut wam, "?- atomic(0.0).");
assert_prolog_failure!(&mut wam, "?- atomic([a,b,c]).");
assert_prolog_failure!(&mut wam, "?- atomic(atop(the_trees)).");
assert_prolog_success!(&mut wam, "?- var(X), X = 3, atomic(X).", [["X = 3"]]);
assert_prolog_failure!(&mut wam, "?- var(X), X = 3, var(X).");
assert_prolog_success!(&mut wam, "?- arg(1, f(a,b,c,d), Arg).", [["Arg = a"]]);
assert_prolog_success!(&mut wam, "?- arg(2, f(a,b,c,d), Arg).", [["Arg = b"]]);
assert_prolog_success!(&mut wam, "?- arg(3, f(a,b,c,d), Arg).", [["Arg = c"]]);
assert_prolog_success!(&mut wam, "?- arg(4, f(a,b,c,d), Arg).", [["Arg = d"]]);
assert_prolog_success!(&mut wam, "?- catch(arg(N, f, Arg), error(E, _), true).",
[["E = instantiation_error", "Arg = _3", "N = _1"]]);
assert_prolog_failure!(&mut wam, "?- arg(N, f(arg, arg, arg), not_arg).");
assert_prolog_failure!(&mut wam, "?- arg(1, f(arg, not_arg, not_arg), not_arg).");
assert_prolog_success!(&mut wam, "?- arg(2, f(arg, not_arg, not_arg), not_arg).");
assert_prolog_success!(&mut wam, "?- arg(3, f(arg, not_arg, not_arg), not_arg).");
assert_prolog_success!(&mut wam, "?- functor(f(a,b,c), F, Arity).",
[["F = f", "Arity = 3"]]);
assert_prolog_success!(&mut wam, "?- functor(f(a,b,c), F, N).",
[["F = f", "N = 3"]]);
assert_prolog_failure!(&mut wam, "?- functor(f(a,b,c), g, N).");
assert_prolog_success!(&mut wam, "?- functor(f(a,b,c), F, 3).", [["F = f"]]);
assert_prolog_failure!(&mut wam, "?- functor(f(a,b,c), F, 4).");
assert_prolog_failure!(&mut wam, "?- functor(f(a,b,c), g, 3).");
assert_prolog_success!(&mut wam, "?- functor(F, f, 0).", [["F = f"]]);
assert_prolog_success!(&mut wam, "?- functor(Func, f, 3).", [["Func = f(_2, _3, _4)"]]);
assert_prolog_success!(&mut wam, "?- functor(Func, f, 4).", [["Func = f(_2, _3, _4, _5)"]]);
assert_prolog_success!(&mut wam, "?- catch(functor(F, \"sdf\", 3), error(E, _), true).",
[["E = type_error(atom, [s, d, f])", "F = _1"]]);
assert_prolog_success!(&mut wam, "?- catch(functor(Func, F, 3), error(E, _), true).",
[["E = instantiation_error", "Func = _1", "F = _2"]]);
assert_prolog_success!(&mut wam, "?- catch(functor(Func, f, N), error(E, _), true).",
[["E = instantiation_error", "Func = _1", "N = _3"]]);
assert_prolog_failure!(&mut wam, "?- catch(functor(Func, f, N), error(E, _), false).");
assert_prolog_success!(&mut wam, "?- X is 3, call(integer, X).");
assert_prolog_failure!(&mut wam, "?- X is 3 + 3.5, call(integer, X).");
assert_prolog_success!(&mut wam, "?- X is 3 + 3.5, \\+ call(integer, X).");
assert_prolog_success!(&mut wam, "?- X is 3 + 3.5, \\+ integer(X).");
assert_prolog_success!(&mut wam, "?- Func =.. [atom].", [["Func = atom"]]);
assert_prolog_success!(&mut wam, "?- Func =.. [\"sdf\"].", [["Func = [s, d, f]"]]);
assert_prolog_success!(&mut wam, "?- Func =.. [1].", [["Func = 1"]]);
assert_prolog_success!(&mut wam, "?- catch(Func =.. [1,2], error(type_error(atom, 1), _), true).");
assert_prolog_success!(&mut wam, "?- f(1,2,3) =.. List.", [["List = [f, 1, 2, 3]"]]);
assert_prolog_success!(&mut wam, "?- f(1,2,3) =.. [f,1,2,3].");
assert_prolog_failure!(&mut wam, "?- f(1,2,3) =.. [f,1].");
assert_prolog_failure!(&mut wam, "?- f(1,2,3) =.. [g,1,2,3].");
assert_prolog_success!(&mut wam, "?- f(1,2,3) =.. [f,X,Y,Z].",
[["X = 1", "Y = 2", "Z = 3"]]);
assert_prolog_success!(&mut wam, "?- length([a,b,c], N).", [["N = 3"]]);
assert_prolog_success_with_limit!(&mut wam, "?- length(Xs, N).",
[["N = 0", "Xs = []"],
["N = 1", "Xs = [_4]"],
["N = 2", "Xs = [_4, _8]"],
["N = 3", "Xs = [_4, _8, _12]"],
["N = 4", "Xs = [_4, _8, _12, _16]"],
["N = 5", "Xs = [_4, _8, _12, _16, _20]"]],
6);
assert_prolog_success!(&mut wam, "?- length(Xs, 3).", [["Xs = [_4, _8, _12]"]]);
assert_prolog_success!(&mut wam, "?- length([], N).", [["N = 0"]]);
assert_prolog_success!(&mut wam, "?- length(Xs, 0).", [["Xs = []"]]);
assert_prolog_success!(&mut wam, "?- length([a,b,[a,b,c]], 3).");
assert_prolog_failure!(&mut wam, "?- length([a,b,[a,b,c]], 2).");
assert_prolog_success!(&mut wam, "?- catch(length(a, []), error(E, _), true).",
[["E = type_error(integer, [])"]]);
assert_prolog_success!(&mut wam, "?- duplicate_term([1,2,3], [X,Y,Z]).",
[["Z = 3", "Y = 2", "X = 1"]]);
assert_prolog_success!(&mut wam, "?- duplicate_term(f(X, [a], Z), f(X, Y, Z)).",
[["X = _3", "Y = [a]", "Z = _5"]]);
assert_prolog_failure!(&mut wam, "?- duplicate_term(g(X), f(X)).");
assert_prolog_success!(&mut wam, "?- duplicate_term(f(X), f(X)).",
[["X = _1"]]);
// test duplicate_term on cyclic terms.
assert_prolog_failure!(&mut wam, "?- X = g(X, Y), Y = f(X), duplicate_term(Y, g(Z)).");
assert_prolog_success!(&mut wam, "?- X = g(X, Y), Y = f(X), duplicate_term(Y, f(Z)).",
[["Y = f(g(X, Y))", "X = g(X, f(X))", "Z = g(Z, f(Z))"]]);
assert_prolog_success!(&mut wam, "?- X = g(X, Y), Y = f(X), duplicate_term(Y, V).",
[["Y = f(g(X, Y))", "X = g(X, f(X))", "V = f(g(_9, V))"]]);
assert_prolog_success!(&mut wam, "?- float(3.14159269).");
assert_prolog_failure!(&mut wam, "?- float(3).");
assert_prolog_failure!(&mut wam, "?- float(\"sdfsa\").");
assert_prolog_failure!(&mut wam, "?- float(atom).");
assert_prolog_failure!(&mut wam, "?- float(structure(functor)).");
assert_prolog_failure!(&mut wam, "?- float([1,2,3]).");
assert_prolog_failure!(&mut wam, "?- float([1,2,X]).");
assert_prolog_failure!(&mut wam, "?- X is 3 rdiv 4, float(X).");
assert_prolog_success!(&mut wam, "?- X is 3 rdiv 4, rational(X).");
assert_prolog_failure!(&mut wam, "?- rational(3).");
assert_prolog_failure!(&mut wam, "?- rational(f(X)).");
assert_prolog_failure!(&mut wam, "?- rational(\"sdfsa\").");
assert_prolog_failure!(&mut wam, "?- rational(atom).");
assert_prolog_failure!(&mut wam, "?- rational(structure(functor)).");
assert_prolog_failure!(&mut wam, "?- rational([1,2,3]).");
assert_prolog_failure!(&mut wam, "?- rational([1,2,X]).");
assert_prolog_success!(&mut wam, "?- compound(functor(compound)).");
assert_prolog_success!(&mut wam, "?- compound(f(X)).");
assert_prolog_success!(&mut wam, "?- compound([1,2,3]).");
assert_prolog_failure!(&mut wam, "?- compound([]).");
assert_prolog_failure!(&mut wam, "?- compound(3.14159269).");
assert_prolog_failure!(&mut wam, "?- compound(3).");
assert_prolog_failure!(&mut wam, "?- compound(\"sdfsa\").");
assert_prolog_failure!(&mut wam, "?- compound(atom).");
assert_prolog_failure!(&mut wam, "?- string(functor(string)).");
assert_prolog_failure!(&mut wam, "?- string(3.14159269).");
assert_prolog_failure!(&mut wam, "?- string(3).");
assert_prolog_failure!(&mut wam, "?- string(f(X)).");
assert_prolog_success!(&mut wam, "?- string(\"sdfsa\").");
assert_prolog_failure!(&mut wam, "?- string(atom).");
assert_prolog_failure!(&mut wam, "?- string([1,2,3]).");
assert_prolog_failure!(&mut wam, "?- string([1,2,X]).");
assert_prolog_success!(&mut wam, "?- X = nonvar, nonvar(X).");
assert_prolog_failure!(&mut wam, "?- nonvar(X).");
assert_prolog_success!(&mut wam, "?- nonvar(f(X)).");
assert_prolog_success!(&mut wam, "?- nonvar(functor(nonvar)).");
assert_prolog_success!(&mut wam, "?- nonvar(3.14159269).");
assert_prolog_success!(&mut wam, "?- nonvar(3).");
assert_prolog_success!(&mut wam, "?- nonvar(\"sdfsa\").");
assert_prolog_success!(&mut wam, "?- nonvar(atom).");
assert_prolog_success!(&mut wam, "?- nonvar([1,2,3]).");
assert_prolog_success!(&mut wam, "?- nonvar([1,2,X]).");
assert_prolog_success!(&mut wam, "?- A = f(A), ground(f(f(A))), ground(f(A)), ground(A).");
assert_prolog_failure!(&mut wam, "?- B = f(A), ground(B).");
assert_prolog_failure!(&mut wam, "?- B = f(A), ground(A).");
assert_prolog_success!(&mut wam, "?- ground(x), ground(f(x)), X = f(x), ground(g(f(X), [a,b])).");
assert_prolog_success!(&mut wam, "?- A = f(A), g(A, B) == g(f(A), B).");
assert_prolog_failure!(&mut wam, "?- A = f(A), g(A, B) == g(f(A), b).");
assert_prolog_failure!(&mut wam, "?- A == B.");
assert_prolog_failure!(&mut wam, "?- A == 12.1.");
assert_prolog_success!(&mut wam, "?- X = x, f(X, x) == f(x, X).");
assert_prolog_failure!(&mut wam, "?- A = f(A), g(A, B) \\== g(f(A), B).");
assert_prolog_success!(&mut wam, "?- A = f(A), g(A, B) \\== g(f(A), b).");
assert_prolog_success!(&mut wam, "?- A \\== B.");
assert_prolog_success!(&mut wam, "?- A \\== 12.1.");
assert_prolog_failure!(&mut wam, "?- X = x, f(X, x) \\== f(x, X).");
assert_prolog_success!(&mut wam, "?- X @=< Y.");
assert_prolog_failure!(&mut wam, "?- X @>= Y.");
assert_prolog_failure!(&mut wam, "?- X @> Y.");
assert_prolog_success!(&mut wam, "?- X @>= X.");
assert_prolog_failure!(&mut wam, "?- atom @=< \"string\".");
assert_prolog_success!(&mut wam, "?- atom @=< atom.");
assert_prolog_failure!(&mut wam, "?- atom @=< aaa.");
assert_prolog_success!(&mut wam, "?- atom @>= \"string\".");
assert_prolog_success!(&mut wam, "?- X is 3 + 3, X @>= Y.");
assert_prolog_success!(&mut wam, "?- f(X) @>= f(X).");
assert_prolog_success!(&mut wam, "?- f(X) @>= a.");
assert_prolog_failure!(&mut wam, "?- f(X) @=< a.");
assert_prolog_success!(&mut wam, "?- [1,2] @=< [1,2].");
assert_prolog_failure!(&mut wam, "?- [1,2,3] @=< [1,2].");
assert_prolog_success!(&mut wam, "?- [] @=< [1,2].");
assert_prolog_failure!(&mut wam, "?- [] @< 1.");
assert_prolog_failure!(&mut wam, "?- [] @< \"string\".");
assert_prolog_failure!(&mut wam, "?- [] @< atom.");
assert_prolog_success!(&mut wam, "?- atom @< [].");
assert_prolog_failure!(&mut wam, "?- 1.1 @< 1.");
assert_prolog_success!(&mut wam, "?- 1.0 @=< 1.");
assert_prolog_success!(&mut wam, "?- 1 @=< 1.0."); //TODO: currently this succeeds. make it fail.
assert_prolog_success!(&mut wam, "?- X =@= Y.");
assert_prolog_failure!(&mut wam, "?- f(X) =@= f(x).");
assert_prolog_failure!(&mut wam, "?- X \\=@= X.");
assert_prolog_success!(&mut wam, "?- f(x) =@= f(x).");
assert_prolog_failure!(&mut wam, "?- [X,Y,Z] =@= [V,W,V].");
assert_prolog_success!(&mut wam, "?- [X,Y,Z] =@= [V,W,Z].");
assert_prolog_success!(&mut wam, "?- [X,Y,X] =@= [V,W,V].");
assert_prolog_success!(&mut wam, "?- g(B) = B, g(A) = A, A =@= B.");
assert_prolog_success!(&mut wam, "?- keysort([1-1, 1-1], Sorted).",
[["Sorted = [1-1, 1-1]"]]);
assert_prolog_success!(&mut wam, "?- keysort([2-99, 1-a, 3-f(_), 1-z, 1-a, 2-44], Sorted).",
[["Sorted = [1-a, 1-z, 1-a, 2-99, 2-44, 3-f(_7)]"]]);
assert_prolog_success!(&mut wam, "?- keysort([X-1,1-1],[2-1,1-1]).",
[["X = 2"]]);
assert_prolog_failure!(&mut wam, "?- Pairs = [a-a|Pairs], keysort(Pairs, _).");
assert_prolog_success!(&mut wam, "?- Pairs = [a-a|Pairs], catch(keysort(Pairs, _), error(E, _), true).",
[["E = type_error(list, [a-a | _22])", "Pairs = [a-a | Pairs]"]]);
assert_prolog_success!(&mut wam, "?- keysort([], L).",
[["L = []"]]);
assert_prolog_success!(&mut wam, "?- catch(keysort([a|_], _), error(E, _), true).",
[["E = instantiation_error"]]);
assert_prolog_success!(&mut wam, "?- catch(keysort([],[a|a]),error(Pat, _),true).",
[["Pat = type_error(list, [a | a])"]]);
assert_prolog_success!(&mut wam, "?- catch(keysort(_, _), error(E, _), true).",
[["E = type_error(list, _13)"]]);
assert_prolog_success!(&mut wam, "?- catch(keysort([a-1], [_|b]), error(E, _), true).",
[["E = type_error(list, [_24 | b])"]]);
assert_prolog_success!(&mut wam, "?- catch(keysort([a-1], [a-b,c-d,a]), error(E, _), true).",
[["E = type_error(pair, a)"]]);
assert_prolog_success!(&mut wam, "?- catch(keysort([a], [a-b]), error(E, _), true).",
[["E = type_error(pair, a)"]]);
assert_prolog_success!(&mut wam, "?- catch(sort([a|_], _), error(E, _), true).",
[["E = instantiation_error"]]);
assert_prolog_success!(&mut wam, "?- catch(sort([],[a|a]),error(Pat, _),true).",
[["Pat = type_error(list, [a | a])"]]);
assert_prolog_success!(&mut wam, "?- sort([], L).",
[["L = []"]]);
assert_prolog_success!(&mut wam, "?- catch(sort(_, []), error(E, _), true).",
[["E = type_error(list, _13)"]]);
assert_prolog_success!(&mut wam, "?- catch(sort([a,b,c], not_a_list), error(E, _), true).",
[["E = type_error(list, not_a_list)"]]);
assert_prolog_success!(&mut wam, "?- call(((G = 2 ; fail), B=3, !)).",
[["G = 2", "B = 3"]]);
assert_prolog_success!(&mut wam, "?- call_with_inference_limit((setup_call_cleanup(S=1,(G=2;fail),writeq(S+G>B)), B=3, !), 100, R).",
[["G = 2", "B = 3", "R = !", "S = 1"]]);
assert_prolog_success!(&mut wam, "?- call_with_inference_limit((setup_call_cleanup(S=1,(G=2;fail),writeq(S+G>B)), B=3, !), 10, R).",
[["S = _1", "G = _4", "B = _14", "R = inference_limit_exceeded"]]);
}
#[test]
fn test_queries_on_setup_call_cleanup()
{
let mut wam = Machine::new();
// Test examples from the ISO Prolog page for setup_call_catch.
assert_prolog_failure!(&mut wam, "?- setup_call_cleanup(false, _, _).");
assert_prolog_success!(&mut wam, "?- catch(setup_call_cleanup(true, throw(unthrown), _), error(instantiation_error, _), true).");
assert_prolog_success!(&mut wam, "?- setup_call_cleanup(true, true, (true ; throw(x))).");
assert_prolog_success!(&mut wam, "?- setup_call_cleanup(true, X = 1, X = 2).",
[["X = 1"]]);
assert_prolog_success!(&mut wam, "?- setup_call_cleanup(true, true, X = 2).",
[["X = 2"]]);
assert_prolog_success!(&mut wam, "?- catch(setup_call_cleanup(true, X=true, X), error(E, _), true).",
[["E = instantiation_error", "X = _1"]]);
assert_prolog_success!(&mut wam, "?- catch(setup_call_cleanup(X=throw(ex), true, X), E, true).",
[["E = ex", "X = _3"]]);
assert_prolog_success!(&mut wam, "?- setup_call_cleanup(true, true, false).");
assert_prolog_success!(&mut wam, "?- setup_call_cleanup(S = 1, G = 2, C = 3).",
[["S = 1", "G = 2", "C = 3"]]);
assert_prolog_success!(&mut wam, "?- setup_call_cleanup((S=1;S=2), G=3, C=4).",
[["S = 1", "G = 3", "C = 4"]]);
assert_prolog_success!(&mut wam, "?- setup_call_cleanup(S=1, G=2, writeq(S+G)).",
[["S = 1", "G = 2"]]);
assert_prolog_success!(&mut wam, "?- setup_call_cleanup(S=1, (G=2;G=3), writeq(S+G)).",
[["S = 1", "G = 2"],
["S = 1", "G = 3"]]);
assert_prolog_success!(&mut wam, "?- setup_call_cleanup(S=1, G=2, writeq(S+G>A+B)), A=3, B=4.",
[["S = 1", "G = 2", "A = 3", "B = 4"]]);
assert_prolog_success!(&mut wam,
"?- catch(setup_call_cleanup(S=1, (G=2;G=3,throw(x)), writeq(S+G)), E, true).",
[["S = 1", "G = 2", "E = _26"], ["G = _4", "E = x", "S = _1"]]);
assert_prolog_success!(&mut wam,
"?- setup_call_cleanup(S=1, (G=2;G=3),writeq(S+G>B)), B=4, !.",
[["S = 1", "B = 4", "G = 2"]]);
assert_prolog_success!(&mut wam,
"?- setup_call_cleanup(S=1,G=2,writeq(S+G>B)),B=3,!.",
[["S = 1", "G = 2", "B = 3"]]);
assert_prolog_success!(&mut wam,
"?- setup_call_cleanup(S=1,(G=2;false),writeq(S+G>B)),B=3,!.",
[["S = 1", "G = 2", "B = 3"]]);
assert_prolog_success!(&mut wam,
"?- setup_call_cleanup(S=1,(G=2;S=2),writeq(S+G>B)), B=3, !.",
[["S = 1", "B = 3", "G = 2"]]);
assert_prolog_failure!(&mut wam,
"?- setup_call_cleanup(S=1,(G=2;G=3), writeq(S+G>B)), B=4, !, throw(x).");
assert_prolog_success!(&mut wam,
"?- catch(setup_call_cleanup(true,throw(goal),throw(cl)), Pat, true).",
[["Pat = goal"]]);
assert_prolog_success!(&mut wam,
"?- catch(( setup_call_cleanup(true,(G=1;G=2),throw(cl)), throw(cont)), Pat, true).",
[["Pat = cont", "G = _1"]]);
// fails here.
assert_prolog_success!(&mut wam,
"?- setup_call_cleanup(true, (X=1;X=2), writeq(a)), setup_call_cleanup(true,(Y=1;Y=2),writeq(b)), !.",
[["Y = 1", "X = 1"]]);
}
#[test]
fn test_queries_on_call_with_inference_limit()
{
let mut wam = Machine::new();
assert_prolog_success!(&mut wam, "?- call_with_inference_limit(throw(error), 0, R).",
[["R = inference_limit_exceeded"]]);
assert_prolog_success!(&mut wam, "?- catch(call_with_inference_limit(throw(error), 1, R), error, true).");
assert_prolog_failure!(&mut wam, "?- call_with_inference_limit(g(X), 5, R).");
submit(&mut wam, "g(1). g(2). g(3). g(4). g(5).");
assert_prolog_success!(&mut wam, "?- call_with_inference_limit(g(X), 5, R).",
[["R = true", "X = 1"],
["R = true", "X = 2"],
["R = true", "X = 3"],
["R = true", "X = 4"],
["R = !", "X = 5"]]);
assert_prolog_success!(&mut wam, "?- call_with_inference_limit(g(X), 5, R), call(true).",
[["R = true", "X = 1"],
["R = true", "X = 2"],
["R = true", "X = 3"],
["R = true", "X = 4"],
["R = !", "X = 5"]]);
assert_prolog_success!(&mut wam, "?- call_with_inference_limit(g(X), 2, R).",
[["R = true", "X = 1"],
["R = true", "X = 2"],
["R = inference_limit_exceeded", "X = _1"]]);
assert_prolog_success!(&mut wam, "?- call_with_inference_limit(g(X), 3, R1),
call_with_inference_limit(g(X), 5, R2).",
[["X = 1", "R1 = true", "R2 = !"],
["X = 2", "R1 = true", "R2 = !"],
["X = 3", "R1 = true", "R2 = !"],
["X = 4", "R1 = true", "R2 = !"],
["X = 5", "R1 = !", "R2 = !"]]);
submit(&mut wam, "f(X) :- call_with_inference_limit(g(X), 5, _).");
assert_prolog_success!(&mut wam, "?- call_with_inference_limit(f(X), 7, R).",
[["R = true", "X = 1"],
["R = true", "X = 2"],
["R = true", "X = 3"],
["R = true", "X = 4"],
["R = !", "X = 5"]]);
assert_prolog_success!(&mut wam, "?- call_with_inference_limit(f(X), 6, R).",
[["R = true", "X = 1"],
["R = true", "X = 2"],
["R = true", "X = 3"],
["R = true", "X = 4"],
["R = inference_limit_exceeded", "X = _1"]]);
assert_prolog_success!(&mut wam, "?- call_with_inference_limit(f(X), 4, R).",
[["R = true", "X = 1"],
["R = true", "X = 2"],
["R = inference_limit_exceeded", "X = _1"]]);
assert_prolog_success!(&mut wam, "?- call_with_inference_limit(f(X), 3, R).",
[["R = true", "X = 1"],
["R = inference_limit_exceeded", "X = _1"]]);
assert_prolog_success!(&mut wam, "?- call_with_inference_limit(f(X), 2, R).",
[["R = inference_limit_exceeded", "X = _1"]]);
submit(&mut wam, "e(X) :- call_with_inference_limit(f(X), 10, _).");
assert_prolog_success!(&mut wam, "?- call_with_inference_limit(e(X), 10, R).",
[["R = true", "X = 1"],
["R = true", "X = 2"],
["R = true", "X = 3"],
["R = true", "X = 4"],
["R = !", "X = 5"]]);
assert_prolog_success!(&mut wam, "?- call_with_inference_limit(e(X), 8, R).",
[["R = true", "X = 1"],
["R = true", "X = 2"],
["R = true", "X = 3"],
["R = true", "X = 4"],
["R = inference_limit_exceeded", "X = _1"]]);
assert_prolog_success!(&mut wam, "?- call_with_inference_limit(e(X), 6, R).",
[["R = true", "X = 1"],
["R = true", "X = 2"],
["R = inference_limit_exceeded", "X = _1"]]);
assert_prolog_success!(&mut wam, "?- call_with_inference_limit(e(X), 5, R).",
[["R = true", "X = 1"],
["R = inference_limit_exceeded", "X = _1"]]);
assert_prolog_success!(&mut wam, "?- call_with_inference_limit(e(X), 4, R).",
[["R = inference_limit_exceeded", "X = _1"]]);
submit(&mut wam, "f(X, R) :- call_with_inference_limit(g(X), 5, R).");
assert_prolog_success!(&mut wam, "?- call_with_inference_limit(f(X, R), 4, S).",
[["S = true", "X = 1", "R = true"],
["S = true", "X = 2", "R = true"],
["S = inference_limit_exceeded", "X = _1", "R = _2"]]);
assert_prolog_success!(&mut wam, "?- call_with_inference_limit(f(X, R), 8, R).",
[["R = true", "X = 1"],
["R = true", "X = 2"],
["R = true", "X = 3"],
["R = true", "X = 4"],
["R = !", "X = 5"]]);
submit(&mut wam, "g(1). g(2). g(3). g(4). g(5). g(6).");
assert_prolog_success!(&mut wam, "?- call_with_inference_limit(f(X, R), 8, S).",
[["R = true", "X = 1", "S = true"],
["R = true", "X = 2", "S = true"],
["R = true", "X = 3", "S = true"],
["R = true", "X = 4", "S = true"],
["R = true", "X = 5", "S = true"],
["R = inference_limit_exceeded", "S = !", "X = _1"]]);
assert_prolog_success!(&mut wam, "?- call_with_inference_limit(g(X), 2, R), call_with_inference_limit(g(X), 1, S).",
[["R = true", "X = 1", "S = !"],
["R = true", "X = 2", "S = !"],
["R = true", "X = 3", "S = !"],
["R = true", "X = 4", "S = !"],
["R = true", "X = 5", "S = !"],
["R = !", "X = 6", "S = !"]]);
assert_prolog_success!(&mut wam, "?- call_with_inference_limit(g(X), 2, R), call_with_inference_limit(g(X), 1, R).",
[["R = !", "X = 6"]]);
assert_prolog_success!(&mut wam, "?- call_with_inference_limit(g(X), 1, R), call_with_inference_limit(g(X), 1, R).",
[["R = inference_limit_exceeded", "X = _1"]]);
}
#[test]
fn test_queries_on_string_lists()
{
let mut wam = Machine::new();
// double_quotes is chars by default.
assert_prolog_success!(&mut wam, "?- \"\" == [].");
assert_prolog_failure!(&mut wam, "?- \"abc\" == [].");
assert_prolog_success!(&mut wam, "?- \"abc\" == ['a', 'b', 'c'].");
assert_prolog_success!(&mut wam, "?- \"abc\" == ['a', 'b', c].");
assert_prolog_success!(&mut wam, "?- \"abc\" == ['a', b, 'c'].");
assert_prolog_success!(&mut wam, "?- \"abc\" == [a, 'b', 'c'].");
assert_prolog_success!(&mut wam, "?- \"abc\" == [a, 'b', c].");
assert_prolog_success!(&mut wam, "?- \"koen\" == [k, o, e, n].");
assert_prolog_success!(&mut wam, "?- \"koen\" = [k, o, e, n].");
assert_prolog_success!(&mut wam, "?- \"koen\" =@= [k, o, e, n].");
assert_prolog_success!(&mut wam, "?- \"koen\" =@= \"koen\".");
assert_prolog_success!(&mut wam, "?- \"koen\" = [k, o | X].",
[["X = [e, n]"]]);
assert_prolog_success!(&mut wam, "?- \"koen\" = [k, o | X], X = \"en\".",
[["X = [e, n]"]]);
assert_prolog_success!(&mut wam, "?- \"koen\" = [k, o | X], X == \"en\".",
[["X = [e, n]"]]);
assert_prolog_success!(&mut wam, "?- \"koen\" = [k, o | X], X =@= \"en\".",
[["X = [e, n]"]]);
submit(&mut wam, "matcher([a,b,c|X], ['d','e','f'|X]).");
assert_prolog_success!(&mut wam, "?- matcher(\"abcdef\", \"defdef\").");
assert_prolog_failure!(&mut wam, "?- matcher(\"abcdef\", \"defdff\").");
assert_prolog_success!(&mut wam, "?- matcher([X, Y, Z | W], [A, B, C | W]).",
[["A = d", "B = e", "C = f", "W = _1", "X = a", "Y = b", "Z = c"]]);
assert_prolog_failure!(&mut wam, "?- matcher([X, Y, Z | W], [X, B, C | W]).");
submit(&mut wam, "matcher([a,b,c|X], X).");
assert_prolog_success!(&mut wam, "?- matcher(\"abcdef\", X), X = [d,e,f|Y], Y == [], X = \"def\".",
[["X = [d, e, f]", "Y = []"]]);
assert_prolog_success!(&mut wam, "?- matcher(\"abcdef\", X), X = [d,e,f|Y], Y == [], X == \"def\".",
[["X = [d, e, f]", "Y = []"]]);
assert_prolog_success!(&mut wam, "?- X = ['a', 'b', 'c' | \"def\"].",
[["X = [a, b, c, d, e, f]"]]);
assert_prolog_success!(&mut wam, "?- X = [a,b,c|\"abc\"].",
[["X = [a, b, c, a, b, c]"]]);
submit(&mut wam, "?- set_prolog_flag(double_quotes, atom).");
assert_prolog_success!(&mut wam, "?- matcher(X, Y).",
[["X = [a, b, c | _1]", "Y = _1"]]);
assert_prolog_failure!(&mut wam, "?- matcher(\"abcdef\", Y).");
submit(&mut wam, "?- set_prolog_flag(double_quotes, chars).");
assert_prolog_success!(&mut wam, "?- X = \"abc\", X = ['a' | Y], set_prolog_flag(double_quotes, atom).",
[["X = \"abc\"", "Y = \"bc\""]]);
// partial strings.
submit(&mut wam, "?- set_prolog_flag(double_quotes, chars).");
assert_prolog_failure!(&mut wam, "?- Y = 5, partial_string(\"abc\", Y).");
assert_prolog_success!(&mut wam, "?- partial_string(\"abc\", X).",
[["X = [a, b, c | _]"]]);
submit(&mut wam, "matcher([a, b, c | X], X).");
assert_prolog_success!(&mut wam, "?- partial_string(\"abc\", X), matcher(X, Y).",
[["X = [a, b, c | _]", "Y = _"]]);
assert_prolog_success!(&mut wam, "?- partial_string(\"abc\", X), matcher(X, Y), Y = \"def\".",
[["X = [a, b, c, d, e, f]", "Y = [d, e, f]"]]);
assert_prolog_success!(&mut wam, "?- partial_string(\"abc\", X), matcher(X, Y), \"def\" = Y.",
[["X = [a, b, c, d, e, f]", "Y = [d, e, f]"]]);
assert_prolog_success!(&mut wam, "?- partial_string(\"abc\", X), matcher(X, Y), partial_string(\"def\", Y),
Y = \"defghijkl\".",
[["X = [a, b, c, d, e, f, g, h, i, j, k, l]",
"Y = [d, e, f, g, h, i, j, k, l]"]]);
assert_prolog_success!(&mut wam, "?- partial_string(\"abc\", X), matcher(X, Y), partial_string(\"def\", Y),
\"defghijkl\" = Y.",
[["X = [a, b, c, d, e, f, g, h, i, j, k, l]",
"Y = [d, e, f, g, h, i, j, k, l]"]]);
assert_prolog_success!(&mut wam, "?- partial_string(\"abc\", X), matcher(X, Y), Y = [d, e, f | G].",
[["X = [a, b, c, d, e, f | _]", "Y = [d, e, f | _]", "G = _"]]);
assert_prolog_success!(&mut wam, "?- partial_string(\"abc\", X), matcher(X, Y), [d, e, f | G] = Y.",
[["X = [a, b, c, d, e, f | _]", "Y = [d, e, f | _]", "G = _"]]);
assert_prolog_success!(&mut wam, "?- partial_string(\"abc\", X), matcher(X, Y), Y = [d, e, f | G],
G = \"ghi\".",
[["X = [a, b, c, d, e, f, g, h, i]", "Y = [d, e, f, g, h, i]", "G = [g, h, i]"]]);
assert_prolog_success!(&mut wam, "?- partial_string(\"abc\", X), matcher(X, Y), Y = [d, e, f | G],
is_partial_string(Y), G = \"ghi\".",
[["X = [a, b, c, d, e, f, g, h, i]", "Y = [d, e, f, g, h, i]", "G = [g, h, i]"]]);
assert_prolog_success!(&mut wam, "?- partial_string(\"abc\", X), matcher(X, Y), Y = [d, e, f | G],
is_partial_string(Y), is_partial_string(G), G = \"ghi\".",
[["X = [a, b, c, d, e, f, g, h, i]", "Y = [d, e, f, g, h, i]", "G = [g, h, i]"]]);
}
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