public void ToSingleRegexString_ReturnsEmptyString_WhenUnionIsEmpty()
{
var union = new UnionExpressionTest(new List<IExpression>(), _randomGenerator);
var result = union.ToSingleStringBuilder().GenerateString();
Assert.AreEqual(string.Empty, result);
}
public void GetInverse_ReturnValueHasTypeUnionExpression()
{
var union = new UnionExpressionTest(new List<IExpression>(), _randomGenerator);
var result = union.GetInverse();
Assert.IsInstanceOf<IntersectionExpression>(result);
}
public void ToSingleRegexString_ReturnsStringValueOfFirstUnionElement_WhenUnionContainsOneElement()
{
var union = new UnionExpressionTest(new List<IExpression> {_expression}, _randomGenerator);
var result = union.ToSingleStringBuilder().GenerateString();
Assert.AreEqual("Claudia", result);
_expression.Received(1).ToStringBuilder();
}
public void GetInverse_ReturnValueHasSameRepeatIntegerIntervalAsOriginal()
{
var repeatRange = new IntegerInterval();
repeatRange.TrySetValue(1, 2);
var union = new UnionExpressionTest(new List<IExpression>(), _randomGenerator) {RepeatRange = repeatRange};
var result = union.GetInverse().RepeatRange;
Assert.AreEqual(repeatRange, result);
}
public void GetInverse_CallsGetComplementOnEachUnionElement()
{
var expression1 = Substitute.For<IExpression>();
var expression2 = Substitute.For<IExpression>();
var unionExpressions = new List<IExpression> {expression1, expression2};
var union = new UnionExpressionTest(unionExpressions, _randomGenerator);
union.GetInverse();
expression1.Received(1).GetInverse();
expression2.Received(1).GetInverse();
}
public void ToSingleRegexString_ReturnsRandomUnionElement_WhenUnionContainsAtLeastTwoElements()
{
_randomGenerator.GetNextInteger(Arg.Any<int>(), Arg.Any<int>()).Returns(2);
var unionExpressions = new List<IExpression>
{
Substitute.For<IExpression>(),
Substitute.For<IExpression>(),
_expression,
Substitute.For<IExpression>()
};
var union = new UnionExpressionTest(unionExpressions, _randomGenerator);
var result = union.ToSingleStringBuilder().GenerateString();
Assert.AreEqual("Claudia", result);
_expression.Received(1).ToStringBuilder();
_randomGenerator.Received(1).GetNextInteger(Arg.Any<int>(), Arg.Any<int>());
}