78 lines
2.6 KiB
C#
78 lines
2.6 KiB
C#
using CanonSharp.Common.LexicalAnalyzer;
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namespace CanonSharp.Tests.LexicalAnalyzerTests;
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public class RegularExpressionTests
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{
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[Fact]
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public void KleeneTest()
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{
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RegularExpression expression = RegularExpression.Concatenate(
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RegularExpression.Kleene(RegularExpression.Single('a')),
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RegularExpression.Single('b'));
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NondeterministicFiniteAutomation automation = expression.Convert2Nfa();
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automation.Start.Transactions.TryGetValue(EmptyChar.Empty, out HashSet<NondeterministicState>? next);
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Assert.NotNull(next);
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Assert.Contains(next, s => s.Transactions.ContainsKey(new EmptyChar('a')));
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Assert.Contains(next, s => s.Transactions.ContainsKey(new EmptyChar('b')));
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}
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[Fact]
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public void AlternateTest()
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{
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RegularExpression expression = RegularExpression.Alternate(
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RegularExpression.Kleene(RegularExpression.Single('a')),
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RegularExpression.Single('b'));
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NondeterministicFiniteAutomation automation = expression.Convert2Nfa();
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automation.Start.Transactions.TryGetValue(EmptyChar.Empty, out HashSet<NondeterministicState>? next);
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Assert.NotNull(next);
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Assert.Contains(next, s => s.Transactions.ContainsKey(new EmptyChar('b')));
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NondeterministicState? state = (from item in next
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where item.Transactions[EmptyChar.Empty].Count == 2
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select item).FirstOrDefault();
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Assert.NotNull(state);
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Assert.Contains(state.Transactions[EmptyChar.Empty],
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s => s.Transactions.ContainsKey(new EmptyChar('a')));
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}
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[Fact]
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public void ConvertTest()
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{
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RegularExpression expression = RegularExpression.Alternate(
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RegularExpression.Kleene(RegularExpression.Single('a')),
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RegularExpression.Single('b'));
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NondeterministicFiniteAutomation automation = expression.Convert2Nfa();
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DeterministicFiniteAutomation dfa = DeterministicFiniteAutomation.Create(automation);
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DeterministicState state2 = dfa.Start.Transaction['a'];
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Assert.Equal(state2, state2.Transaction['a']);
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DeterministicState state3 = dfa.Start.Transaction['b'];
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Assert.Empty(state3.Transaction);
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Assert.Equal(3, dfa.FinalStates.Count);
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}
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[Fact]
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public void NondeterministicStateSetTest()
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{
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Dictionary<NondeterministicStateSet, char> map = [];
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NondeterministicState key1 = new();
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NondeterministicState key2 = new();
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map.Add(new NondeterministicStateSet([key1, key2]), 'a');
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Assert.Equal('a', map[new NondeterministicStateSet([key2, key1])]);
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}
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}
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