public void Parse_WithPlus_ReturnsExpectedTree()
{
// Arrange
var pattern = "a+";
// Act
var regex = Regex.Parse(pattern);
// Assert
regex.Tree.AssertRequiredRepeating(
TreeAssert.Char('a'));
}
public void Parse_WithStar_ReturnsExpectedTree()
{
// Arrange
var pattern = "a*";
// Act
var regex = Regex.Parse(pattern);
// Assert
regex.Tree.AssertOptionalRepeating(
TreeAssert.Char('a'));
}
public void Parse_WithQuestion_ReturnsExpectedTree()
{
// Arrange
var pattern = "a?";
// Act
var regex = Regex.Parse(pattern);
// Assert
regex.Tree.AssertOptional(
TreeAssert.Char('a'));
}
public void Parse_WithAlternatives_ReturnsExpectedTree()
{
// Arrange
var pattern = "a|b";
// Act
var regex = Regex.Parse(pattern);
// Assert
regex.Tree.AssertAlternative(
TreeAssert.Char('a'),
TreeAssert.Char('b'));
}
public void Parse_WithPlusInConcatination_ReturnsExpectedTree()
{
// Arrange
var pattern = "ab+c";
// Act
var regex = Regex.Parse(pattern);
// Assert
regex.Tree.AssertConcatenation(
TreeAssert.Char('a'),
TreeAssert.Concat(
TreeAssert.Plus(
TreeAssert.Char('b')),
TreeAssert.Char('c')));
}
public void Parse_WithNestedAlternativeGroups_ReturnsExpectedTree()
{
// Arrange
var pattern = "(a|b)(c|d)";
// Act
var regex = Regex.Parse(pattern);
// Assert
regex.Tree.AssertConcatenation(
TreeAssert.Alt(
TreeAssert.Char('a'),
TreeAssert.Char('b')),
TreeAssert.Alt(
TreeAssert.Char('c'),
TreeAssert.Char('d')));
}
public void Parse_WithGroupedAlternativesInConcatination_ReturnsExpectedTree()
{
// Arrange
var pattern = "a(b|c)d";
// Act
var regex = Regex.Parse(pattern);
// Assert
regex.Tree.AssertConcatenation(
TreeAssert.Char('a'),
TreeAssert.Concat(
TreeAssert.Alt(
TreeAssert.Char('b'),
TreeAssert.Char('c')),
TreeAssert.Char('d')));
}
public void Parse_WithConcatinatedAlternatives_ReturnsExpectedTree()
{
// Arrange
var pattern = "ab|cd";
// Act
var regex = Regex.Parse(pattern);
// Assert
regex.Tree.AssertAlternative(
TreeAssert.Concat(
TreeAssert.Char('a'),
TreeAssert.Char('b')),
TreeAssert.Concat(
TreeAssert.Char('c'),
TreeAssert.Char('d')));
}
public void Parse_WithMultipleChars_ReturnsExpectedTree()
{
// Arrange
var pattern = "abcde";
// Act
var regex = Regex.Parse(pattern);
// Assert
regex.Tree.AssertConcatenation(
TreeAssert.Char('a'),
TreeAssert.Concat(
TreeAssert.Char('b'),
TreeAssert.Concat(
TreeAssert.Char('c'),
TreeAssert.Concat(
TreeAssert.Char('d'),
TreeAssert.Char('e')))));
}