public void Grab_UnresolvedRuleRef_ThrowsException()
{
var ruleRef = new RuleRef <string>();
var index = new TokenStreamIndex(new TokenStream(StaticLexer.FromWords()), 0);
ruleRef.Invoking(r => index.OperationsMock().Evaluate(r)).Should().Throw <InvalidOperationException>();
}
private void AssertLookahead(IRule rule, TokenStreamIndex index, bool expectedSuccess)
{
var opsMock = index.OperationsMock().Evaluate(rule);
opsMock.Result.IsSuccess.Should().Be(expectedSuccess);
opsMock.Result.Index.Index.Should().Be(0);
if (expectedSuccess && rule is And)
{
opsMock.ConcatTokens().Should().Be("A");
}
}
public void RuleRef_GrabWithRule_GrabsTargetRule()
{
var mockRule = new MockRule(nameof(MockRule));
var ruleRef = new RuleRef <string>(mockRule);
var index = new TokenStreamIndex(new TokenStream(StaticLexer.FromWords()), 0);
index.OperationsMock().Evaluate(ruleRef);
mockRule.DidGrab.Should().BeTrue();
}
public void AbbaSequence_GivenParseTextAndStart_BehavesCorrectly(string text, int start, string expectedMatch)
{
var stream = new TokenStream(new CharacterLexer(text));
var index = new TokenStreamIndex(stream, start);
var rule = CreateAbbaRule();
var opsMock = index.OperationsMock().Evaluate(rule);
opsMock.Result.IsSuccess.Should().Be(expectedMatch.Length == 4);
opsMock.Result.Index.Index.Should().Be(opsMock.Result.IsSuccess ? start + expectedMatch.Length : start);
opsMock.ConcatTokens().Should().Be(expectedMatch);
}
public void ARepeated3to5_GivenParseTextAndStart_BehavesCorrectly(string text, bool expectedSuccess, string expectedMatch)
{
var stream = new TokenStream(new CharacterLexer(text));
var index = new TokenStreamIndex(stream, 0);
var rule = CreateARepeatedRule(3, 5);
var opsMock = index.OperationsMock().Evaluate(rule);
opsMock.Result.IsSuccess.Should().Be(expectedSuccess);
opsMock.Result.Index.Index.Should().Be(expectedSuccess ? expectedMatch.Length : 0);
opsMock.ConcatTokens().Should().Be(expectedMatch);
}
public void ARepeated_GivenArbitraryNumberOfAs_BehavesCorrectly(int count, string text)
{
var stream = new TokenStream(new CharacterLexer(text));
var index = new TokenStreamIndex(stream, 0);
var rule = CreateARepeatedRule();
var opsMock = index.OperationsMock().Evaluate(rule);
opsMock.Result.IsSuccess.Should().BeTrue();
opsMock.Result.Index.Index.Should().Be(count);
opsMock.Tokens.Count.Should().Be(count);
opsMock.Tokens.All(t => t.Value == "A").Should().BeTrue();
}
public void AnyTerminal_WithAnyCharacter_Succeeds(string text)
{
var stream = new TokenStream(new CharacterLexer(text));
var rule = new AnyTerminal("TEST");
TokenStreamIndex index;
RuleOperationsMock opsMock;
for (int i = 0; i < text.Length; i++)
{
index = new TokenStreamIndex(stream, i);
opsMock = index.OperationsMock().Evaluate(rule);
opsMock.Result.IsSuccess.Should().BeTrue();
opsMock.Result.Index.Index.Should().Be(i + 1);
opsMock.ConcatTokens().Should().Be(text.Substring(i, 1));
}
index = new TokenStreamIndex(stream, text.Length);
opsMock = index.OperationsMock().Evaluate(rule);
opsMock.Result.IsSuccess.Should().BeFalse();
opsMock.Result.Index.Index.Should().Be(index.Index);
opsMock.ConcatTokens().Should().Be(String.Empty);
}
