public void ToStringShouldReturnConcatenationOfChildNodesToStringSeperatedByPipes()
{
// Arrange
var childNodes = new List <RegexNode> {
new CharacterNode('a'), new CharacterNode('b'), new CharacterNode('c')
};
var target = new AlternationNode(childNodes);
// Act
var result = target.ToString();
// Assert
result.ShouldBe("a|b|c");
}
public void SpanLengthShouldBeEqualToToStringLength()
{
// Arrange
var childNodes = new List <RegexNode> {
new CharacterNode('a'), new CharacterNode('b'), new CharacterNode('c')
};
var target = new AlternationNode(childNodes);
// Act
var(_, Length) = target.GetSpan();
// Assert
Length.ShouldBe(5);
}
public void AlternatesShouldReturnOriginalAlternates()
{
// Arrange
var thenBranch = new CharacterNode('t');
var elseBranch = new CharacterNode('e');
var alternates = new AlternationNode(new List <RegexNode> {
thenBranch, elseBranch
});
var condition = new CaptureGroupNode(new CharacterNode('c'));
var target = new ConditionalGroupNode(condition, alternates);
// Act
var result = target.Alternates;
// Assert
result.ShouldBe(alternates);
}
public void AlternatesGetSpanShouldReturnTupleWithStartEqualToConditionLengthPlus2()
{
// Arrange
var thenBranch = new CharacterNode('t');
var elseBranch = new CharacterNode('e');
var alternates = new AlternationNode(new List <RegexNode> {
thenBranch, elseBranch
});
var condition = new CaptureGroupNode(new CharacterNode('c'));
var target = new ConditionalGroupNode(condition, alternates);
// Act
var(Start, _) = target.Alternates.GetSpan();
// Assert
Start.ShouldBe(condition.ToString().Length + 2);
}
public void ToStringShouldReturnConditionalGroupWithConditionAndThenAndElseAlternates()
{
// Arrange
var thenBranch = new CharacterNode('t');
var elseBranch = new CharacterNode('e');
var alternates = new AlternationNode(new List <RegexNode> {
thenBranch, elseBranch
});
var condition = new CaptureGroupNode(new CharacterNode('c'));
var target = new ConditionalGroupNode(condition, alternates);
// Act
var result = target.ToString();
// Assert
result.ShouldBe("(?(c)t|e)", result);
}
public void FirstAlternateSpanShouldStartBe0()
{
// Arrange
var firstChild = new CharacterNode('a');
var secondChild = new CharacterNode('b');
var thirdChild = new CharacterNode('c');
var childNodes = new List <RegexNode> {
firstChild, secondChild, thirdChild
};
_ = new AlternationNode(childNodes);
// Act
var(Start, Length) = firstChild.GetSpan();
// Assert
Start.ShouldBe(0);
Length.ShouldBe(1);
}
public void ChildNodesGetSpanShouldReturnTupleWithStartEqualToPreviousChildsStartPlusLengthStartingAt2()
{
// Arrange
var thenBranch = new CharacterNode('t');
var elseBranch = new CharacterNode('e');
var alternates = new AlternationNode(new List <RegexNode> {
thenBranch, elseBranch
});
var condition = new CaptureGroupNode(new CharacterNode('c'));
var target = new ConditionalGroupNode(condition, alternates);
// Act
var(Start, Length) = target.ChildNodes.First().GetSpan();
var(Start2, _) = target.ChildNodes.ElementAt(1).GetSpan();
// Assert
Start.ShouldBe(2);
Start2.ShouldBe(Start + Length);
}
public void ToStringOnConditionalGroupNodeWithprefixShouldReturnPrefixBeforeConditionalGroupNode()
{
// Arrange
var comment = new CommentGroupNode("This is a comment.");
var thenBranch = new CharacterNode('t');
var elseBranch = new CharacterNode('e');
var alternates = new AlternationNode(new List <RegexNode> {
thenBranch, elseBranch
});
var condition = new CaptureGroupNode(new CharacterNode('c'));
var target = new ConditionalGroupNode(condition, alternates)
{
Prefix = comment
};
// Act
var result = target.ToString();
// Assert
result.ShouldBe("(?#This is a comment.)(?(c)t|e)");
}
public void NonFirstAlternateSpanShouldStartAfterPreviousAlternateAndPipe()
{
// Arrange
var firstChild = new CharacterNode('a');
var secondChild = new CharacterNode('b');
var thirdChild = new CharacterNode('c');
var childNodes = new List <RegexNode> {
firstChild, secondChild, thirdChild
};
_ = new AlternationNode(childNodes);
// Act
var(secondChildStart, secondChildLength) = secondChild.GetSpan();
var(thirdChildStart, thirdChildLength) = thirdChild.GetSpan();
// Assert
secondChildStart.ShouldBe(2);
secondChildLength.ShouldBe(1);
thirdChildStart.ShouldBe(4);
thirdChildLength.ShouldBe(1);
}