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PermutationParserTests.cs
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PermutationParserTests.cs
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using Pidgin.Permutation;
using Xunit;
using static Pidgin.Parser;
namespace Pidgin.Tests;
public class PermutationParserTests : ParserTestBase
{
[Theory]
[InlineData("abc")]
[InlineData("bac")]
[InlineData("bca")]
[InlineData("cba")]
[InlineData("cab")]
public void TestSimplePermutation(string value)
{
var parser = PermutationParser
.Create<char>()
.Add(Char('a'))
.Add(Char('b'))
.Add(Char('c'))
.Build()
.Select(
tup =>
{
var (((_, a), b), c) = tup;
return string.Concat(a, b, c);
}
);
AssertFullParse(parser, value, "abc");
}
[Theory]
[InlineData("abc", "abc")]
[InlineData("bac", "abc")]
[InlineData("bca", "abc")]
[InlineData("cba", "abc")]
[InlineData("cab", "abc")]
[InlineData("ac", "a_c")]
[InlineData("ca", "a_c")]
public void TestOptionalPermutation(string input, string expected)
{
var parser = PermutationParser
.Create<char>()
.Add(Char('a'))
.AddOptional(Char('b'), '_')
.Add(Char('c'))
.Build()
.Select(
tup =>
{
var (((_, a), b), c) = tup;
return string.Concat(a, b, c);
}
);
AssertFullParse(parser, input, expected);
}
}