public void Text()
{
// Given
var expression = new SubExpression("x", new TextExpression("x"));
// When
var result = expression.Transform("");
// Then
Assert.Equal("", result);
}
public void TextMismatch()
{
// Given
var expression = new SubExpression("x", new TextExpression("y"));
// When
var result = expression.Transform("");
// Then
Assert.Null(result);
}
public void BackreferenceUndefined()
{
// Given
var expression = new SubExpression(new BackreferenceExpression("foo"), new TextExpression("x"));
// When
var result = expression.Transform("");
// Then
Assert.Null(result);
}