public void ToSingleStringBuilder_ReturnedStringBuilderGeneratesEmptyString_WhenNoConcatExpressionsIsNull()
{
var expression = new IntersectionExpressionTest(null, _randomGenerator);
var result = expression.ToSingleStringBuilder().GenerateString();
Assert.IsNotNull(result);
Assert.AreEqual(string.Empty, result);
}
public void ToSingleStringBuilder_ReturnedStringBuilderReturnsF_WhenSingleCharacterClassWithFContainedInIntersectionExpression()
{
var expression = new IntersectionExpressionTest(new List <IExpression> {
ToCharacterClass("F")
}, _randomGenerator);
var result = expression.ToSingleStringBuilder().GenerateString();
Assert.IsNotNull(result);
Assert.AreEqual("F", result);
}
public void ToSingleStringBuilder_ReturnedStringBuilderReturnsIntersection_WhenTwoCharacterClassesContainedInIntersectionExpression()
{
var firstCharClass = ToCharacterClass("F", "f");
var secondCharClass = ToCharacterClass("f");
var expression = new IntersectionExpressionTest(new List <IExpression> {
firstCharClass, secondCharClass
}, _randomGenerator);
var result = expression.ToSingleStringBuilder().GenerateString();
Assert.IsNotNull(result);
Assert.AreEqual("f", result);
}
public void GetInverse_ReturnsStringBuilderReturningComplementOfSingleCharacterClass_WhenIntersectionExpressionContainsSingleElementWithCharactersRA()
{
var concat1 = new ConcatenationExpression(_randomGenerator);
concat1.Append(ToCharacterClass("r", "a"));
var expression = new IntersectionExpressionTest(new List <IExpression> {
concat1
}, _randomGenerator);
var result = expression.GetInverse().ToStringBuilder().GenerateString();
Assert.IsNotNull(result);
Assert.AreEqual("F", result);
}
public void ToSingleStringBuilder_ReturnedStringBuilderReturnsIntersection_WhenTwoConcatExpressionsContainedInIntersectionExpression()
{
var concat1 = new ConcatenationExpression(_randomGenerator);
concat1.Append(ToCharacterClass("F", "f")).Append(ToCharacterClass("R", "r"));
var concat2 = new ConcatenationExpression(_randomGenerator);
concat2.Append(ToCharacterClass("F")).Append(ToCharacterClass("r"));
var expression = new IntersectionExpressionTest(new List <IExpression> {
concat1, concat2
}, _randomGenerator);
var result = expression.ToSingleStringBuilder().GenerateString();
Assert.IsNotNull(result);
Assert.AreEqual("Fr", result);
}
