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pilisp_test.dart
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pilisp_test.dart
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import 'package:fast_immutable_collections/fast_immutable_collections.dart';
import 'package:pilisp/pilisp.dart';
import 'package:pilisp/src/pilisp_core.dart';
import 'package:pilisp/src/pilisp_expr.dart';
import 'package:test/test.dart';
final symbolQuote = PLSymbol('quote');
void main() {
tearDownAll(() async {
await piLispEnv.shutDown();
});
group('Language', () {
group('/ Reading', () {
test('/ Unreadable', () {
expect(() => PiLisp.readString('#<Some Object>'),
throwsA(isA<UnreadableFormException>()));
});
test('/ Multiple forms returns first', () {
expect(PiLisp.readString('1 2 3'), 1);
});
test('/ quote', () {
expect(
PiLisp.readString("'foo"), PLList([symbolQuote, PLSymbol('foo')]));
expect(PiLisp.readString("'()"), PLList([symbolQuote, PLList([])]));
});
test('/ nil', () {
expect(PiLisp.readString('nil'), PLNil());
});
test('/ Booleans', () {
expect(PiLisp.readString('true'), true);
expect(PiLisp.readString('false'), false);
});
group('/ Numbers', () {
test('/ int', () {
expect(PiLisp.readString('42'), 42);
expect(PiLisp.readString('+42'), 42);
expect(PiLisp.readString('0'), 0);
expect(PiLisp.readString('-42'), -42);
expect(PiLisp.readString('0x20'), 0x20);
expect(PiLisp.readString('0x42e'), 0x42e);
expect(PiLisp.readString('+0x42e'), 0x42e);
expect(PiLisp.readString('-0x42e'), -0x42e);
expect(PiLisp.readString('042'), 42);
expect(PiLisp.readString('+042'), 42);
expect(PiLisp.readString('-042'), -42);
});
test('/ double', () {
expect(PiLisp.readString('42.2'), 42.2);
expect(PiLisp.readString('+42.2'), 42.2);
expect(PiLisp.readString('-42.2'), -42.2);
expect(PiLisp.readString('42.2e0'), 42.2);
expect(PiLisp.readString('422e-1'), 42.2);
expect(PiLisp.readString('422e1'), 4220);
expect(PiLisp.readString('422e+1'), 4220);
});
});
group('/ Symbols', () {
test('/ regular', () {
expect(PiLisp.readString('ls'), PLSymbol('ls'));
expect(PiLisp.readString('ls!'), PLSymbol('ls!'));
expect(PiLisp.readString('ls1234567890!#&*'),
PLSymbol('ls1234567890!#&*'));
expect(PiLisp.readString('ls1234567890!@#&*'),
PLSymbol('ls1234567890!'));
expect(() => PiLisp.readString('1abc'),
throwsA(isA<UnreadableFormException>()));
});
test('/ term (dot)', () {
expect(PiLisp.readString('.id'), PLTerm('id'));
expect(PiLisp.readString('.id!'), PLTerm('id!'));
expect(PiLisp.readString('.id1234567890!#&*'),
PLTerm('id1234567890!#&*'));
expect(
PiLisp.readString('.id1234567890!@#&*'), PLTerm('id1234567890!'));
});
test('/ term (colon)', () {
expect(PiLisp.readString(':id'), PLTerm('id'));
expect(PiLisp.readString(':id!'), PLTerm('id!'));
expect(PiLisp.readString(':id1234567890!#&*'),
PLTerm('id1234567890!#&*'));
expect(
PiLisp.readString(':id1234567890!@#&*'), PLTerm('id1234567890!'));
});
test('/ with punctuation chars', () {
expect(PiLisp.readString('Date#now'), PLSymbol('Date#now'));
});
});
group('/ Vectors', () {
test('/ unclosed', () {
expect(() => PiLisp.readString('['),
throwsA(isA<UnexpectedEndOfInput>()));
});
test('/ improperly closed', () {
expect(() => PiLisp.readString('[1 2 3 4}'),
throwsA(isA<MismatchedDelimiter>()));
});
test('/ empty', () {
expect(PiLisp.readString('[]'), PLVector([]));
});
test('/ flat', () {
expect(PiLisp.readString('[1 2 3]'), PLVector([1, 2, 3]));
expect(
PiLisp.readString('[a b c]'),
PLVector([
PLSymbol('a'),
PLSymbol('b'),
PLSymbol('c'),
]));
});
test('/ nested', () {
expect(
PiLisp.readString('[1 [2 3] 4]'),
PLVector([
1,
PLVector([2, 3]),
4,
]));
expect(
PiLisp.readString('[ 1 [ 2 [3 4] ] 5 ]'),
PLVector([
1,
PLVector([
2,
PLVector([3, 4])
]),
5,
]));
expect(
PiLisp.readString('[1 [2 {3 4} ] 5 ]'),
PLVector([
1,
PLVector([
2,
IMap<int, int>({3: 4})
]),
5,
]));
});
});
group('/ Maps', () {
test('/ unclosed', () {
expect(() => PiLisp.readString('{'),
throwsA(isA<UnexpectedEndOfInput>()));
});
test('/ empty', () {
expect(PiLisp.readString('{}'), IMap<Object?, Object?>({}));
});
test('/ flat', () {
expect(PiLisp.readString('{1 2 3 4}'), IMap<int, int>({1: 2, 3: 4}));
expect(PiLisp.readString('{1 2, 3 4}'), IMap<int, int>({1: 2, 3: 4}));
});
group('/ nested', () {
test('/ shallow', () {
expect(
PiLisp.readString('{ a { 2 3 }}'),
IMap<PLSymbol, IMap<int, int>>({
PLSymbol('a'): IMap<int, int>({2: 3}),
}));
});
test('/ deep', () {
expect(
PiLisp.readString('{ 1 { 2 {3 4}}}'),
IMap<int, Object?>({
1: IMap<int, IMap<int, int>>({
2: IMap<int, int>({3: 4})
})
}));
expect(
PiLisp.readString('{ 1 { 2 {3 4} } 5 {6 7}}'),
IMap<int, Object?>({
1: IMap<int, IMap<int, int>>({
2: IMap<int, int>({3: 4})
}),
5: IMap<int, int>({6: 7}),
}));
expect(
PiLisp.readString('{ 1 { 2 {3 {4 z}}}}'),
IMap<int, Object?>({
1: IMap<int, Object?>({
2: IMap<int, IMap<int, PLSymbol>>({
3: IMap<int, PLSymbol>({4: PLSymbol('z')})
})
})
}));
expect(
PiLisp.readString('{ 1 { 2 [{3 {4 5}} 6]}}'),
IMap<int, Object?>({
1: IMap<int, Object?>({
2: PLVector([
IMap<int, IMap<int, int>>({
3: IMap<int, int>({4: 5})
}),
6,
])
})
}));
});
});
});
group('/ Sets', () {
test('/ unclosed', () {
expect(() => PiLisp.readString('#{'),
throwsA(isA<UnexpectedEndOfInput>()));
});
test('/ empty', () {
expect(PiLisp.readString('#{}'), ISet<Object?>({}));
});
test('/ flat', () {
expect(PiLisp.readString('#{1 2 3}'), ISet<int>({1, 2, 3}));
expect(PiLisp.readString('#{1 2 3 1}'), ISet<int>({1, 2, 3}));
expect(PiLisp.readString('#{a b c}'),
ISet<PLSymbol>({PLSymbol('a'), PLSymbol('b'), PLSymbol('c')}));
});
group('/ nested', () {
test('/ shallow', () {
expect(
PiLisp.readString('#{[1] [2] [3] [1]}'),
ISet<Object?>({
PLVector([1]),
PLVector([2]),
PLVector([3]),
}));
});
});
});
group('/ Strings', () {
group('/ simple', () {
test('/ empty', () {
expect(PiLisp.readString('""'), '');
});
test('/ alphanumeric content', () {
expect(PiLisp.readString('"abc123"'), 'abc123');
});
});
group('/ escapes', () {
test('/ single character', () {
expect(PiLisp.readString(r'"x\\y"'), r'x\y');
expect(() => PiLisp.readString(r'"x\y"'),
throwsA(isA<UnsupportedEscapeCharacter>()));
expect(PiLisp.readString(r'"He said, \"What are you doing?\""'),
'He said, "What are you doing?"');
// expect(
// PiLisp.readString(r'"No man is an island,\nEntire of itself;"'),
// 'No man is an island,\nEntire of itself;');
// expect(PiLisp.readString(r'"Wow\fsuch\thidden\rescapes\nin\bhere"'),
// 'Wow\fsuch\thidden\rescapes\nin\bhere');
});
test('/ hexadecimal char codes', () {
expect(PiLisp.readString(r'"Hmm\x2c I see"'), 'Hmm, I see');
expect(PiLisp.readString(r'"Hmm, I see"'), 'Hmm\x2c I see');
expect(PiLisp.readString(r'"Hi \u2605"'), 'Hi ★');
expect(PiLisp.readString(r'"Hi ★"'), 'Hi \u2605');
expect(PiLisp.readString(r'"Music \u{1D11E}"'), 'Music 𝄞');
expect(PiLisp.readString(r'"Music 𝄞"'), 'Music \u{1D11E}');
expect(() => PiLisp.readString(r'"Hi \u260"'),
throwsA(isA<UnsupportedEscapeCharacter>()));
expect(() => PiLisp.readString(r'"Hi \uzzzz"'),
throwsA(isA<UnsupportedEscapeCharacter>()));
});
});
});
group('/ Regular expressions', () {
test('/ no escapes', () {
expect(PiLisp.readString(r'#"[0-9]{3}-[0-9]{3}-[0-9]{4}"'),
RegExp(r'[0-9]{3}-[0-9]{3}-[0-9]{4}'));
});
test('/ with escapes', () {
expect(PiLisp.readString(r'#"[\r\n]+"'), RegExp(r'[\r\n]+'));
});
});
group('/ Comments', () {
test('/ single line, no newline', () {
expect(PiLisp.readString('; Wow'), PLNil());
});
test('/ multiple lines', () {
expect(PiLisp.readString('; Alpha\n; Beta'), PLNil());
});
test('/ preceded by values', () {
expect(PiLisp.readString('42 ; Alpha\n; Beta\n42'), 42);
});
test('/ followed by values', () {
expect(PiLisp.readString('; Alpha\n; Beta\n42'), 42);
});
});
group('/ Shebang', () {
test('/ like comment', () {
expect(PiLisp.readString('#!/usr/bin/env pilisp'), PLNil());
expect(PiLisp.readString('#!/usr/bin/env pilisp\n\n42'), 42);
});
});
group('/ Ignored expression', () {
test('/ atomic', () {
expect(PiLisp.readString('#_1 2'), 2);
expect(PiLisp.readString('#_a b'), PLSymbol('b'));
});
test('/ collection', () {
expect(PiLisp.readString('#_[1 2 3] 4'), 4);
expect(PiLisp.readString('#_#{1 2 3} 4'), 4);
expect(PiLisp.readString('#_{1 2 3 4} 5'), 5);
expect(PiLisp.readString('#_[1 2 3 4] 5'), 5);
expect(PiLisp.readString('#_[1 2] [3 4]'), PLVector([3, 4]));
});
});
group('/ Invocation', () {
test('/ Empty', () {
expect(PiLisp.readString('()'), PLList([]));
});
group('/ Special forms', () {
group('/ fn*', () {
test('/ minimal', () {
expect(PiLisp.readString('(fn* [])'),
PLList([PLSymbol('fn*'), PLVector([])]));
});
});
group('/ anonymous fn #()', () {
test('/ improper anonymous arg', () {
expect(() => evalProgram('#(%bad)'),
throwsA(isA<MalformedAnonymousArgument>()));
expect(evalProgram('#(%1-a-thing)'), isA<PLFunction>());
});
test('/ minimal anonymous fn', () {
expect(evalProgram('(#((fn* foozle [x] x) %) 1)'), 1);
});
test('/ multiple args', () {
expect(evalProgram('(#((fn* fizzle [x y] [x y]) %1 %2) 1 2)'),
PLVector([1, 2]));
});
test('/ named args', () {
expect(
evalProgram(
'(#((fn* fizzle [x y] [x y]) %1-my-x %2-my-y) "alpha" "beta")'),
PLVector(['alpha', 'beta']));
});
test('/ skipped args', () {
expect(
evalProgram(
'(#((fn* fizzle [x z] [x z]) %1-my-x %3-my-z) "alpha" "beta" "gamma")'),
PLVector(['alpha', 'gamma']));
});
test('/ variable arity', () {
expect(
evalProgram(
'(#((fn* fizzle [coll] coll) %&) "alpha" "beta" "gamma")'),
PLVector(['alpha', 'beta', 'gamma']));
});
});
});
});
});
group('/ Equality', () {
group('/ Collections', () {
group('/ Vectors', () {
test('/ vectors equal vectors', () {
expect(PLVector([1]), PLVector([1]));
});
// test('/ vectors equal lists', () {
// expect(PLVector<int>([1]) == PLList([1]), true);
// expect(PLList([1]), PLVector<int>([1]));
// });
});
group('/ Sets', () {
group('/ membership', () {
test('/ vector members', () {
expect(
ISet<Object?>({
PLVector([1])
}),
contains(PLVector([1])));
});
});
});
});
});
group('/ Macro expansion', () {
test('/ macroexpand-1', () {
expect(evalProgram('''(macroexpand-1 (quote 'foo))'''),
PLList([symbolQuote, PLSymbol('foo')]));
});
// test('/ macroexpand', () {
// expect(
// evalProgram('''(macroexpand '(def pipe? (partial = '|)))'''),
// PLList([
// symbolDef,
// PLSymbol('pipe?'),
// PLList([
// PLSymbol('partial'),
// PLSymbol('='),
// PLList([symbolQuote, PLSymbol('|')])
// ])
// ]));
// });
test('/ macroexpand before eval', () {
evalProgram('''(def pipe? (fn* pipe?* [x] (= x '|)))''');
expect(
evalProgram('''(macroexpand '(pipe? '|))'''),
PLList([
PLSymbol('pipe?'),
PLList([symbolQuote, PLSymbol('|')])
]));
// EVIDENCE of double eval
expect(evalProgram('''(pipe? '|)'''), true);
});
});
group('/ Macro usage', () {
test('/ invoke a macro', () {
expect(evalProgram('''(or false nil 2)'''), 2);
});
});
group('/ Evaluation', () {
test('/ quote', () {
expect(evalProgram("'a"), PLSymbol('a'));
expect(evalProgram("'()"), PLList([]));
expect(evalProgram("'(a b)"), PLList([PLSymbol('a'), PLSymbol('b')]));
});
test('/ nil', () {
expect(evalProgram('nil'), null);
});
test('/ Booleans', () {
expect(evalProgram('true'), true);
expect(evalProgram('false'), false);
});
group('/ Numbers', () {
group('/ Dart host', () {
test('/ int', () {
expect(evalProgram('42'), 42);
expect(evalProgram('+42'), 42);
expect(evalProgram('0'), 0);
expect(evalProgram('-42'), -42);
expect(evalProgram('0x20'), 0x20);
expect(evalProgram('0x42e'), 0x42e);
expect(evalProgram('+0x42e'), 0x42e);
expect(evalProgram('-0x42e'), -0x42e);
expect(evalProgram('042'), 042);
expect(evalProgram('+042'), 042);
expect(evalProgram('-042'), -042);
});
test('/ double', () {
expect(evalProgram('42.2'), 42.2);
expect(evalProgram('+42.2'), 42.2);
expect(evalProgram('-42.2'), -42.2);
expect(evalProgram('42.2e0'), 42.2);
expect(evalProgram('422e-1'), 42.2);
expect(evalProgram('422e1'), allOf(equals(4220), isA<double>()));
expect(evalProgram('422e+1'), allOf(equals(4220), isA<double>()));
});
});
});
group('/ Terms', () {
test('/ term identity', () {
expect(evalProgram(':foo'), PLTerm('foo'));
});
test('/ term invocation', () {
expect(evalProgram('(:foo {:foo 42})'), 42);
evalProgram('(def a-map {:wow "yep"})');
expect(evalProgram('(:wow a-map)'), 'yep',
reason:
'Arguments to terms should be evaluated before the term is invoked.');
});
});
group('/ Lists', () {
test('/ empty', () {
expect(evalProgram('[]'), PLVector([]));
});
test('/ flat', () {
expect(evalProgram('[1 2 3]'), PLVector([1, 2, 3]));
});
test('/ nested', () {
expect(
evalProgram('[1 [2 3] 4]'),
PLVector([
1,
PLVector([2, 3]),
4,
]));
expect(
evalProgram('[1 [2 [3 4]] 5]'),
PLVector([
1,
PLVector([
2,
PLVector([3, 4])
]),
5,
]));
expect(
evalProgram('[1 [2 {3 4}] 5]'),
PLVector([
1,
PLVector([
2,
IMap<int, int>({3: 4})
]),
5,
]));
});
});
group('/ Maps', () {
test('/ empty', () {
expect(evalProgram('{}'), IMap<Object?, Object?>({}));
});
test('/ flat', () {
expect(evalProgram('{1 2 3 4}'), IMap<int, int>({1: 2, 3: 4}));
});
group('/ nested', () {
test('/ shallow', () {
expect(
evalProgram('{1 { 2 3 }}'),
IMap<int, IMap<int, int>>({
1: IMap<int, int>({2: 3}),
}));
});
test('/ deep', () {
expect(
evalProgram('{1 {2 {3 4}}}'),
IMap<int, Object?>({
1: IMap<int, IMap<int, int>>({
2: IMap<int, int>({3: 4})
})
}));
expect(
evalProgram('{1 {2 {3 4}} 5 {6 7}}'),
IMap<int, Object?>({
1: IMap<int, IMap<int, int>>({
2: IMap<int, int>({3: 4})
}),
5: IMap<int, int>({6: 7}),
}));
expect(
evalProgram('{1 {2 {3 {4 5}}}}'),
IMap<int, Object?>({
1: IMap<int, Object?>({
2: IMap<int, IMap<int, int>>({
3: IMap<int, int>({4: 5})
})
})
}));
expect(
evalProgram('{1 {2 [{3 {4 5}} 6]}}'),
IMap<int, Object?>({
1: IMap<int, Object?>({
2: PLVector([
IMap<int, IMap<int, int>>({
3: IMap<int, int>({4: 5})
}),
6,
])
})
}));
});
});
});
group('/ Sets', () {
test('/ empty', () {
expect(evalProgram('#{}'), ISet<Object?>({}));
});
test('/ flat', () {
expect(evalProgram('#{1 2 3}'), ISet<int>({1, 2, 3}));
expect(evalProgram('#{1 2 3 1}'), ISet<int>({1, 2, 3}));
expect(evalProgram('#{"a" "b" "c"}'), ISet<String>({'a', 'b', 'c'}));
});
group('/ nested', () {
test('/ shallow', () {
expect(
evalProgram('#{[1] [2] [3] [1]}'),
ISet<Object?>({
PLVector([1]),
PLVector([2]),
PLVector([3]),
}));
});
});
});
group('/ Strings', () {
group('/ simple', () {
test('/ empty', () {
expect(evalProgram('""'), '');
});
test('/ alphanumeric content', () {
expect(evalProgram('"abc123"'), 'abc123');
});
});
group('/ Escapes', () {
test('/ single character', () {
expect(evalProgram(r'"x\\y"'), 'x\\y');
expect(() => evalProgram(r'"x\y"'),
throwsA(isA<UnsupportedEscapeCharacter>()));
expect(evalProgram(r'"He said, \"What are you doing?\""'),
'He said, "What are you doing?"');
expect(evalProgram(r'"No man is an island,\nEntire of itself;"'),
'No man is an island,\nEntire of itself;');
expect(evalProgram(r'"Wow\fsuch\thidden\rescapes\nin\bhere"'),
'Wow\fsuch\thidden\rescapes\nin\bhere');
});
test('/ hexadecimal char codes', () {
expect(evalProgram(r'"Hmm\x2c I see"'), 'Hmm, I see');
expect(evalProgram(r'"Hmm, I see"'), 'Hmm\x2c I see');
expect(evalProgram(r'"Hi \u2605"'), 'Hi ★');
expect(evalProgram(r'"Hi ★"'), 'Hi \u2605');
expect(evalProgram(r'"Music \u{1D11E}"'), 'Music 𝄞');
expect(evalProgram(r'"Music 𝄞"'), 'Music \u{1D11E}');
expect(() => evalProgram(r'"Hi \u260"'),
throwsA(isA<UnsupportedEscapeCharacter>()));
expect(() => evalProgram(r'"Hi \uzzzz"'),
throwsA(isA<UnsupportedEscapeCharacter>()));
});
});
});
group('/ Regular expressions', () {
test('/ no escapes', () {
expect(evalProgram(r'#"[0-9]{3}-[0-9]{3}-[0-9]{4}"'),
RegExp(r'[0-9]{3}-[0-9]{3}-[0-9]{4}'));
});
test('/ with escapes', () {
expect(evalProgram(r'#"[\r\n]+"'), RegExp(r'[\r\n]+'));
});
});
group('/ Special forms', () {
group('/ def', () {
test('/ malformed', () {
expect(() => evalProgram('(def)'), throwsA(isA<FormatException>()));
expect(() => evalProgram('(def alpha)'),
throwsA(isA<FormatException>()));
expect(() => evalProgram('(def alpha 1 2)'),
throwsA(isA<FormatException>()));
});
test('/ minimal', () {
expect(evalProgram('(def alpha "abc")'), 'abc');
});
test('/ returns value set', () {
expect(
evalProgram(
'(let* [a (def beta "abc") b (def gamma "xyz")] [a b])'),
evalProgram('["abc" "xyz"]'));
});
test('/ sets value in global scope', () {
expect(
evalProgram(
'(let* [a (def delta "abc") b (def epsilon "xyz")] [a b delta epsilon])'),
evalProgram('["abc" "xyz" "abc" "xyz"]'));
expect(evalProgram('epsilon'), 'xyz');
expect(evalProgram('(def zeta "abc")'), 'abc');
expect(evalProgram('zeta'), 'abc');
expect(evalProgram('(do (def eta "xyz"))'), 'xyz');
expect(evalProgram('eta'), 'xyz');
expect(
() => evalProgram('theta'),
throwsA(isA<UndefinedSymbol>().having(
(exception) => exception.symbol,
'Symbol should not be defined',
PLSymbol('theta'))));
});
test('/ of functions', () {
expect(evalProgram('((def omega {.doc "wow"} (fn* [a] a)) 2)'), 2);
});
group('/ with metadata', () {
group('/ literals', () {
test('/ string as doc string', () {
expect(evalProgram('(def theta "Doc string" 42)'), 42);
expect(
piLispEnv.scopes.first[PLSymbol('theta')]?.meta
.get(PLTerm('doc')),
'Doc string');
});
test('/ map', () {
expect(
evalProgram(
'(def iota {.doc "My doc" .added "1.0-dev"} 24)'),
24);
expect(piLispEnv.scopes.first[PLSymbol('iota')]?.meta,
evalProgram('{.doc "My doc" .added "1.0-dev"}'));
});
});
group('/ expressions', () {
test('/ evals to string', () {
expect(
evalProgram(
'(def kappa ((fn* [] "My calculated docstring")) 42)'),
42);
expect(
piLispEnv.scopes.first[PLSymbol('kappa')]?.meta
.get(PLTerm('doc')),
'My calculated docstring');
});
test('/ evals to map', () {
expect(
evalProgram(
'(def mu ((fn* [] {.doc "My map" .macro false})) 42)'),
42);
expect(piLispEnv.scopes.first[PLSymbol('mu')]?.meta,
evalProgram('{.doc "My map", .macro false}'));
});
});
});
});
group('/ fn*', () {
group('/ malformed', () {
test('/ no params', () {
expect(
() => evalProgram('(fn*)'), throwsA(isA<FormatException>()));
expect(() => evalProgram('(fn* foo)'),
throwsA(isA<FormatException>()));
});
test('/ duplicate params', () {
expect(() => evalProgram('(fn* [a a])'),
throwsA(isA<FormatException>()));
});
test('/ unbound symbols', () {
expect(() => evalProgram('(fn* [a] b)'),
throwsA(isA<UndefinedSymbol>()));
expect(() => evalProgram('(fn* [a] (fn [b] #(+ c %)))'),
throwsA(isA<UndefinedSymbol>()));
expect(
() =>
evalProgram('(fn* [a] (let [x (fn [b] #(+ c %))] :ok))'),
throwsA(isA<UndefinedSymbol>()));
});
});
test('/ empty ', () {
expect(evalProgram('(fn* [])'), isA<PLFunction>());
});
test('/ with name', () {
expect(evalProgram('(fn* a-fn [])'), isA<PLFunction>());
});
test('/ invoke returning literal value', () {
expect(evalProgram('((fn* []))'), null);
expect(evalProgram('((fn* [] nil))'), null);
expect(evalProgram('((fn* [] 42))'), 42);
expect(evalProgram('((fn* [] 42.3))'), 42.3);
expect(evalProgram('((fn* [] .id))'), PLTerm('id'));
expect(evalProgram('((fn* [] "wow"))'), 'wow');
expect(evalProgram('((fn* [] []))'), PLVector([]));
expect(
evalProgram('((fn* [] ["1" "2" 3]))'), PLVector(['1', '2', 3]));
expect(evalProgram('((fn* [] {1 2 3 4}))'), IMap({1: 2, 3: 4}));
expect(evalProgram('((fn* [] #{1 2 2 3}))'), ISet([1, 2, 3]));
});
test('/ nested fns', () {
expect(evalProgram('((fn* [a] ((fn* [b] a) 3)) 2)'), 2);
expect(evalProgram('((fn* [a] ((fn* [b] b) 3)) 2)'), 3);
});
group('/ variable arity', () {
test('/ no required args', () {
expect(evalProgram('((fn* [& args] args))'), PLVector([]));
expect(evalProgram('((fn* [& args] args) 1 2 3)'),
PLVector([1, 2, 3]));
});
test('/ with required args', () {
expect(() => evalProgram('((fn* [a & args] a))'),
throwsA(isA<FormatException>()));
expect(evalProgram('((fn* [a & args] a) 1)'), 1);
expect(evalProgram('((fn* [a & args] args) 1)'), PLVector([]));
expect(evalProgram('((fn* [a & args] args) 1 2 3)'),
PLVector([2, 3]));
expect(evalProgram('((fn* [a b & args] b) 1 2 3)'), 2);
expect(evalProgram('((fn* [a b & args] args) 1 2 3)'),
PLVector([3]));
});
});
group('/ multiple arity', () {
group('/ all required args', () {
test('/ for defaults', () {
evalProgram(r'''
(def maf (fn* maf
([a] (maf a 1))
([a b] [a b])))
''');
expect(evalProgram('(maf 1)'), PLVector([1, 1]));
expect(evalProgram('(maf 2)'), PLVector([2, 1]));
expect(evalProgram('(maf 2 3)'), PLVector([2, 3]));
});
});
group('/ with variable arity', () {
test('/ too many variable arity signatures', () {
expect(() => evalProgram('(fn* ([a & bs]) ([a b & cs]))'),
throwsA(isA<FormatException>()));
});
test('/ ambiguous required vs variable arities', () {
expect(() => evalProgram('(fn* ([a & bs]) ([a b]))'),
throwsA(isA<FormatException>()));
expect(() => evalProgram('(fn* ([a & bs]) ([a b c]))'),
throwsA(isA<FormatException>()));
});
test('/ just variable arity', () {
evalProgram(r'''
(def jva (fn* [& args] {.args args}))
''');
expect(evalProgram('(jva ["a" "b"])'),
evalProgram('{.args [["a" "b"]]}'));
});
test('/ required and variable arguments', () {
evalProgram(r'''
(def rva
(fn* rva
([a] (rva a 1 2 3))
([a & xs]
[a xs])))
''');
expect(evalProgram('(rva {.a "beta"})'),
evalProgram('[{.a "beta"} [1 2 3]]'));
});
});
});
group('/ lexical closure', () {
test('/ simple lexical closure', () {
// expect(
// evalProgram('((let [a 42] (fn [b] (+ a b))) 3)'), 45);
expect(evalProgram(r'''
(let [counter-state (state 0)]
(defn inc-counter {:doc "Stateful counter"} []
(write-state state (fn incrementer [num] (+ num 1)))))'''),
isA<PLFunction>());
});
});
});
group('/ do', () {
test('/ empty', () {
expect(evalProgram('(do)'), null);
});
test('/ single expression', () {
expect(evalProgram('(do 1)'), 1);
expect(evalProgram('(do ["a" "b"])'), PLVector(['a', 'b']));
});
test('/ multiple expressions', () {
expect(evalProgram('(do 1 2 3)'), 3);
});
});
group('/ quote', () {
test('/ malformed', () {
expect(
() => evalProgram('(quote)'), throwsA(isA<FormatException>()));
expect(() => evalProgram('(quote a b)'),
throwsA(isA<FormatException>()));
});
test('/ minimal', () {
expect(evalProgram('(quote foo)'), PLSymbol('foo'));
expect(evalProgram("'foo"), PLSymbol('foo'));
expect(evalProgram('(quote (+ 1 2 3))'),
PLVector([PLSymbol('+'), 1, 2, 3]).toPLList());
});
test('/ nested', () {
expect(evalProgram("[1 'a 2]"), PLVector([1, PLSymbol('a'), 2]));
expect(
evalProgram("'(a (b c (d e)))"),
PLList([
PLSymbol('a'),
PLList([
PLSymbol('b'),
PLSymbol('c'),
PLList([PLSymbol('d'), PLSymbol('e')])
])
]));
});
});
group('/ let*', () {
group('/ empty bindings', () {
test('/ empty body', () {
expect(evalProgram('(let* [])'), null);
});
test('/ has body', () {
expect(evalProgram('(let* [] 42)'), 42);
});
});
group('/ has bindings', () {
test('/ empty body', () {
expect(evalProgram('(let* [a 1])'), null);
});
test('/ has body', () {
expect(evalProgram('(let* [a 1] a)'), 1);
});
group('/ has multiple bindings', () {
test('/ no dependency', () {
expect(evalProgram('(let* [a 1 b 2] a)'), 1);
expect(evalProgram('(let* [a 1 b 2] b)'), 2);
expect(evalProgram('(let* [a 1 b 2] [a b])'), PLVector([1, 2]));
});
test('/ dependency', () {
expect(
evalProgram('(let* [a (fn* [x] [x x]) b (a [3 3])] b)'),
PLVector([
PLVector([3, 3]),
PLVector([3, 3])
]));
expect(evalProgram('(let* [a 1 b 2] b)'), 2);
});
});
});
});
group('/ if', () {
test('/ malformed', () {
expect(() => evalProgram('(if)'), throwsA(isA<FormatException>()));
expect(() => evalProgram('(if true)'),
throwsA(isA<FormatException>()));
expect(() => evalProgram('(if true "true")'),
throwsA(isA<FormatException>()));
expect(() => evalProgram('(if true "true" "false" "oops")'),
throwsA(isA<FormatException>()));
});
test('/ literal condition', () {
expect(evalProgram('(if true 1 2)'), 1);
expect(evalProgram('(if "true" 1 2)'), 1);
expect(evalProgram('(if false 1 2)'), 2);
expect(evalProgram('(if nil 1 2)'), 2);
});
test('/ evaled condition', () {
expect(evalProgram('(if ((fn* [] true)) 1 2)'), 1);
expect(evalProgram('(if ((fn* [] "true")) 1 2)'), 1);
expect(evalProgram('(if ((fn* [] false)) 1 2)'), 2);
expect(evalProgram('(if ((fn* [])) 1 2)'), 2);
});
});
group('/ try/catch/finally', () {
test('/ try standalone', () {
expect(() => evalProgram('(try (throw (ex-info "wow" {})))'),
throwsA(isA<Exception>()));
});
test('/ try + finally', () {
evalProgram('(def finally-called? (state false))');
expect(evalProgram('(deref finally-called?)'), false);
try {
evalProgram(
'(try (throw (ex-info "finally!" {})) (finally (write-state finally-called? true)))');
expect(true, false,
reason:
'The previous expression should throw an exception, but obviously did not if you\'re reading this'); // Unreachable
} catch (e) {
expect(evalProgram('(deref finally-called?)'), true);
}
});
test('/ try + catch', () {
evalProgram('(def finally-called? (state false))');
expect(evalProgram('(deref finally-called?)'), false);
evalProgram(
'(try (throw (ex-info "finally!" {})) (catch _ e (write-state finally-called? true)))');
expect(evalProgram('(deref finally-called?)'), true);
});
test('/ try + catch + finally', () {
evalProgram('(def what-called? (state #{}))');
expect(evalProgram('(deref what-called?)'), ISet([]));
evalProgram(
'(try (throw (ex-info "finally!" {})) (catch _ e (write-state what-called? conj :catch)) (finally (write-state what-called? conj :finally)))');
expect(evalProgram('(deref what-called?)'),
evalProgram('#{:catch :finally}'));
});
test('/ try with throwing fn', () {
evalProgram('(def calls (state []))');
expect(evalProgram('(deref calls)'), PLVector([]));
evalProgram('(defn throw-axe [] (throw (ex-info "Axe!" {})))');
evalProgram(r'''
(try
(throw-axe)
(catch _ e (write-state calls conj :catch))
(finally (write-state calls conj :finally)))''');
expect(
evalProgram('(deref calls)'), evalProgram('[:catch :finally]'));
});
test('/ try with throwing fn that catches', () {
evalProgram('(def calls (state []))');
expect(evalProgram('(deref calls)'), PLVector([]));
evalProgram('''
(defn throw-axe []
(try
(throw (ex-info "Axe!" {}))
(catch _ e
(write-state calls conj :catch-fn))))''');
evalProgram(r'''
(try
(throw-axe)
(catch _ e (write-state calls conj :catch))
(finally (write-state calls conj :finally)))''');
expect(evalProgram('(deref calls)'),
evalProgram('[:catch-fn :finally]'));
});
test('/ try with throwing fn that catches and rethrows', () {
evalProgram('(def calls (state []))');
expect(evalProgram('(deref calls)'), PLVector([]));
evalProgram(
'(defn throw-axe [] (try (throw (ex-info "Axe!" {})) (catch _ e (write-state calls conj :catch-fn) (throw e))))');
evalProgram(r'''
(try
(throw-axe)
(catch _ e (write-state calls conj :catch))
(finally (write-state calls conj :finally)))''');
expect(evalProgram('(deref calls)'),
evalProgram('[:catch-fn :catch :finally]'));
});
test('/ try nested with rethrow', () {
evalProgram('(def calls (state []))');
expect(evalProgram('(deref calls)'), PLVector([]));
evalProgram(r'''
(try
(try
(throw (ex-info "finally!" {}))