52 lines
1.6 KiB
C#
52 lines
1.6 KiB
C#
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using CanonSharp.Combinator;
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using CanonSharp.Combinator.Abstractions;
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using CanonSharp.Combinator.Extensions;
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using CanonSharp.Tests.Utils;
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using static CanonSharp.Combinator.ParserBuilder;
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using static CanonSharp.Combinator.Text.TextParserBuilder;
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namespace CanonSharp.Tests.CombinatorsTests;
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public class ModifierParserTests : ParserTestsBase
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{
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[Fact]
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public void DoTest()
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{
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Parser<char, char> parser = Token('a').Do(x => Assert.Equal('a', x)).Do(x => Assert.Equal('a', x),
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failedResult => Assert.ThrowsAny<ParseException>(() => failedResult.Value));
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ValidateSuccessfulResult(parser, 'a', "abc");
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ValidateFailedResult(parser, "bcd");
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}
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[Fact]
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public void LookAheadTest()
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{
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Parser<char, char> parser = Token('a').LookAhead().Next(_ => Token('a'), _ => Token('b'));
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ValidateSuccessfulResult(parser, 'a', "abc");
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ValidateSuccessfulResult(parser, 'b', "bcd");
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}
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[Fact]
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public void NotTest()
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{
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Parser<char, char> parser = Token('a').Not('b');
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ValidateSuccessfulResult(parser, 'b', "bcd");
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parser = Token('a').Not().Bind(_ => Token('b'));
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ValidateSuccessfulResult(parser, 'b', "bcd");
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}
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[Fact]
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public void TryTest()
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{
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Parser<char, string> parser = String("abc").Try("cde");
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ValidateSuccessfulResult(parser, "abc", "abc");
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ValidateSuccessfulResult(parser, "cde", "cde");
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parser = String("abc").Try(_ => "cde");
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ValidateSuccessfulResult(parser, "abc", "abc");
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ValidateSuccessfulResult(parser, "cde", "cde");
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}
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}
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