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parser_predicate_test.dart
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import 'dart:typed_data';
import 'package:petitparser/petitparser.dart';
import 'package:petitparser/src/parser/character/predicate/char.dart';
import 'package:petitparser/src/parser/character/predicate/constant.dart';
import 'package:petitparser/src/parser/character/predicate/lookup.dart';
import 'package:petitparser/src/parser/character/predicate/range.dart';
import 'package:test/test.dart' hide anyOf;
import 'utils/assertions.dart';
import 'utils/matchers.dart';
void main() {
group('character', () {
const predicate = ConstantCharPredicate.any;
test('single character', () {
final parser =
SingleCharacterParser.internal(predicate, 'single character');
for (var code = 0; code < 0xffff; code++) {
final char = String.fromCharCode(code);
expect(parser, isParseSuccess(char, result: char));
}
});
test('any single character', () {
final parser =
AnySingleCharacterParser.internal(predicate, 'any single character');
for (var code = 0; code < 0xffff; code++) {
final char = String.fromCharCode(code);
expect(parser, isParseSuccess(char, result: char));
}
});
test('unicode character', () {
final parser =
UnicodeCharacterParser.internal(predicate, 'unicode character');
for (var code = 0; code < 0x10ffff; code++) {
final char = String.fromCharCode(code);
expect(parser, isParseSuccess(char, result: char));
}
});
test('any unicode character', () {
final parser = AnyUnicodeCharacterParser.internal(
predicate, 'any unicode character');
for (var code = 0; code < 0x10ffff; code++) {
final char = String.fromCharCode(code);
expect(parser, isParseSuccess(char, result: char));
}
});
});
group('pattern', () {
expectParserInvariants(PatternParser('42', 'number expected'));
test('string', () {
final parser = PatternParser('42', 'number expected');
expect(parser,
isParseSuccess('42', result: isPatternMatch('42', start: 0, end: 2)));
expect(parser, isParseFailure('4', message: 'number expected'));
expect(parser, isParseFailure('43', message: 'number expected'));
});
test('regexp', () {
final parser = PatternParser(RegExp(r'\d+'), 'digits expected');
expect(
parser,
isParseSuccess('1', result: isPatternMatch('1', start: 0, end: 1)),
);
expect(
parser,
isParseSuccess('12', result: isPatternMatch('12', start: 0, end: 2)),
);
expect(
parser,
isParseSuccess('123', result: isPatternMatch('123', start: 0, end: 3)),
);
expect(
parser,
isParseSuccess('1a',
result: isPatternMatch('1', start: 0, end: 1), position: 1),
);
expect(parser, isParseFailure(''));
expect(parser, isParseFailure('a'));
expect(parser, isParseFailure('a1'));
});
test('regexp groups', () {
final parser =
PatternParser(RegExp(r'(\d+)\s*,\s*(\d+)'), 'pair expected');
expect(
parser,
isParseSuccess('1,2',
result: isPatternMatch('1,2', groups: ['1', '2'])),
);
expect(
parser,
isParseSuccess('1, 2',
result: isPatternMatch('1, 2', groups: ['1', '2'])),
);
expect(
parser,
isParseSuccess('1 ,2',
result: isPatternMatch('1 ,2', groups: ['1', '2'])),
);
expect(
parser,
isParseSuccess('1 , 2',
result: isPatternMatch('1 , 2', groups: ['1', '2'])),
);
expect(
parser,
isParseSuccess('12,3',
result: isPatternMatch('12,3', groups: ['12', '3'])),
);
expect(
parser,
isParseSuccess('12, 3',
result: isPatternMatch('12, 3', groups: ['12', '3'])),
);
expect(
parser,
isParseSuccess('12 ,3',
result: isPatternMatch('12 ,3', groups: ['12', '3'])),
);
});
});
group('string', () {
expectParserInvariants(string('foo'));
test('default', () {
final parser = string('foo');
expect(parser, isParseSuccess('foo', result: 'foo'));
expect(parser, isParseFailure('', message: '"foo" expected'));
expect(parser, isParseFailure('f', message: '"foo" expected'));
expect(parser, isParseFailure('fo', message: '"foo" expected'));
expect(parser, isParseFailure('Foo', message: '"foo" expected'));
});
test('message', () {
final parser = string('foo', message: 'special expected');
expect(parser, isParseSuccess('foo', result: 'foo'));
expect(parser, isParseFailure('', message: 'special expected'));
expect(parser, isParseFailure('f', message: 'special expected'));
expect(parser, isParseFailure('fo', message: 'special expected'));
expect(parser, isParseFailure('Foo', message: 'special expected'));
});
test('ignore-case', () {
final parser = string('foo', ignoreCase: true);
expect(parser, isParseSuccess('foo', result: 'foo'));
expect(parser, isParseSuccess('FOO', result: 'FOO'));
expect(parser, isParseSuccess('fOo', result: 'fOo'));
expect(parser,
isParseFailure('', message: '"foo" (case-insensitive) expected'));
expect(parser,
isParseFailure('f', message: '"foo" (case-insensitive) expected'));
expect(parser,
isParseFailure('Fo', message: '"foo" (case-insensitive) expected'));
});
});
group('convert', () {
test('empty', () {
final parser = ''.toParser();
expect(parser, isA<EpsilonParser<String>>());
expect(parser, isParseSuccess('', result: ''));
});
test('single char', () {
final parser = 'a'.toParser();
expect(
parser,
isCharacterParser<SingleCharacterParser>(
predicate: const SingleCharPredicate(97)));
expect(parser, isParseSuccess('a', result: 'a'));
expect(parser, isParseFailure('A', message: '"a" expected'));
});
test('single char (message)', () {
final parser = 'a'.toParser(message: 'first letter');
expect(
parser,
isCharacterParser<SingleCharacterParser>(
predicate: const SingleCharPredicate(97)));
expect(parser, isParseSuccess('a', result: 'a'));
expect(parser, isParseFailure('A', message: 'first letter'));
});
test('single char (case-insensitive)', () {
final parser = 'a'.toParser(ignoreCase: true);
expect(
parser,
isCharacterParser<SingleCharacterParser>(
predicate:
LookupCharPredicate(65, 97, Uint32List.fromList([1, 1]))));
expect(parser, isParseSuccess('a', result: 'a'));
expect(parser, isParseSuccess('A', result: 'A'));
expect(parser,
isParseFailure('b', message: '"a" (case-insensitive) expected'));
});
test('single char (unicode)', () {
final parser = '🂓'.toParser(unicode: true);
expect(
parser,
isCharacterParser<UnicodeCharacterParser>(
predicate: const SingleCharPredicate(127123)));
expect(parser, isParseSuccess('🂓', result: '🂓'));
expect(parser, isParseFailure('b', message: '"🂓" expected'));
});
test('pattern', () {
final parser = 'a-z'.toParser(isPattern: true);
expect(
parser,
isCharacterParser<SingleCharacterParser>(
predicate: const RangeCharPredicate(97, 122)));
expect(parser, isParseSuccess('x', result: 'x'));
expect(parser, isParseFailure('X', message: '[a-z] expected'));
});
test('pattern (message)', () {
final parser =
'a-z'.toParser(isPattern: true, message: 'letter expected');
expect(
parser,
isCharacterParser<SingleCharacterParser>(
predicate: const RangeCharPredicate(97, 122)));
expect(parser, isParseSuccess('x', result: 'x'));
expect(parser, isParseFailure('1', message: 'letter expected'));
});
test('pattern (case-insensitive)', () {
final parser = 'a-z'.toParser(isPattern: true, ignoreCase: true);
expect(
parser,
isCharacterParser<SingleCharacterParser>(
predicate: LookupCharPredicate(
65, 122, Uint32List.fromList([67108863, 67108863]))));
expect(parser, isParseSuccess('x', result: 'x'));
expect(parser, isParseSuccess('X', result: 'X'));
expect(parser,
isParseFailure('1', message: '[a-z] (case-insensitive) expected'));
});
test('pattern (unicode)', () {
final parser = '🂡-🂪'.toParser(isPattern: true, unicode: true);
expect(
parser,
isCharacterParser<UnicodeCharacterParser>(
predicate: const RangeCharPredicate(127137, 127146)));
expect(parser, isParseSuccess('🂡', result: '🂡'));
expect(parser, isParseSuccess('🂧', result: '🂧'));
expect(parser, isParseFailure('🂓', message: '[🂡-🂪] expected'));
});
test('string', () {
final parser = 'foo'.toParser();
expect(parser, isA<PredicateParser>());
expect(parser, isParseSuccess('foo', result: 'foo'));
expect(parser, isParseFailure('Foo', message: '"foo" expected'));
});
test('string (message)', () {
final parser = 'foo'.toParser(message: 'special expected');
expect(parser, isA<PredicateParser>());
expect(parser, isParseSuccess('foo', result: 'foo'));
expect(parser, isParseFailure('bar', message: 'special expected'));
});
test('string (case-insensitive)', () {
final parser = 'foo'.toParser(ignoreCase: true);
expect(parser, isA<PredicateParser>());
expect(parser, isParseSuccess('foo', result: 'foo'));
expect(parser, isParseSuccess('Foo', result: 'Foo'));
expect(parser,
isParseFailure('bar', message: '"foo" (case-insensitive) expected'));
});
});
}