public void GetInverse_ReturnsIntersectExpressionWithTwoSubexpressionsOfLength3_WhenOriginalExpressionContains3SubExpressionsWithMiddleExpressionOfRepeatIntervalFrom1To2()
{
var repeatInterval = new IntegerInterval();
repeatInterval.TrySetValue(1, 2);
var inverseSubExpression = Substitute.For <IExpression>();
inverseSubExpression.GetInverse().Returns(Substitute.For <IExpression>());
var subExpression = Substitute.For <IExpression>();
subExpression.GetInverse().Returns(inverseSubExpression);
subExpression.RepeatRange.Returns(repeatInterval);
subExpression.ExpansionLength.Returns(2);
var concatExpression = new ConcatenationExpression(_randomGenerator);
concatExpression.Append(inverseSubExpression).Append(subExpression).Append(inverseSubExpression);
var result = concatExpression.GetInverse();
Assert.IsInstanceOf <IntersectionExpression>(result);
var resultAsList = ((IntersectionExpression)result).ToConcatExpressionList();
Assert.AreEqual(2, resultAsList.Count);
Assert.AreEqual(3, ((UnionExpression)resultAsList[0]).ToIntersectionExpressionList().Count);
Assert.AreEqual(4, ((UnionExpression)resultAsList[1]).ToIntersectionExpressionList().Count);
}
public void GetInverse_ReturnsIntersectExpressionWithTwoSubexpressionsEachHavingRepeatIntervalNull_WhenOriginalExpressionContainsSingleSubExpressionWithRepeatIntervalFrom1To2()
{
var repeatInterval = new IntegerInterval();
repeatInterval.TrySetValue(1, 2);
var inverseSubExpression = Substitute.For <IExpression>();
var subExpression = Substitute.For <IExpression>();
subExpression.GetInverse().Returns(inverseSubExpression);
subExpression.RepeatRange.Returns(repeatInterval);
subExpression.ExpansionLength.Returns(2);
var concatExpression = new ConcatenationExpression(_randomGenerator);
concatExpression.Append(subExpression);
var result = concatExpression.GetInverse();
Assert.IsInstanceOf <IntersectionExpression>(result);
var resultAsList = ((IntersectionExpression)result).ToConcatExpressionList();
Assert.AreEqual(2, resultAsList.Count);
Assert.IsNull(resultAsList[0].RepeatRange);
Assert.IsNull(resultAsList[1].RepeatRange);
}