public void SliceDelete_FromEnumerableExtensions_ReturnsCorrectValues()
{
this.RunSliceTestCases((from, to, step, length) =>
{
var source = Enumerable.Range(0, length);
var sut = EnumerableExtensions.SliceDelete(source, from, to, step).ToArray();
var expected = SliceDeleteExpectedResultCalculator.Calculate(from, to, step, length);
LazyAssert.True(
expected.SequenceEqual(sut),
() => ErrorFormatter.Format(sliceDeleteResultErrorFormat, source, from, to, step, expected, sut));
});
}
public void SliceDelete_FromEnumerableExtensions_CallsDisposeOnce()
{
this.RunSliceTestCases((from, to, step, length) =>
{
var sut = new EnumerableMock <int>(Enumerable.Range(0, length));
EnumerableExtensions.SliceDelete(sut, from, to, step).Sum();
if (sut.Enumerators.Count > 0)
{
var disposeCallCount = sut.Enumerators.Single().DisposeCallCount;
LazyAssert.True(
disposeCallCount == 1,
() => ErrorFormatter.Format(sliceDeleteDisposeOnceErrorFormat, from, to, step, length, disposeCallCount));
}
});
}
public void SliceDelete_FromEnumerableExtensions_DoesNotCallReset()
{
this.RunSliceTestCases((from, to, step, length) =>
{
var sut = new EnumerableMock <int>(Enumerable.Range(0, length));
EnumerableExtensions.SliceDelete(sut, from, to, step).Sum();
if (sut.Enumerators.Count > 0)
{
var resetCallCount = sut.Enumerators.Single().ResetCallCount;
LazyAssert.True(
resetCallCount == 0,
() => ErrorFormatter.Format(sliceDeleteDoesntCallResetErrorFormat, from, to, step, length, resetCallCount));
}
});
}
public void SliceDelete_FromEnumerableExtensions_DoesntHandleExceptions()
{
this.RunSliceTestCases((from, to, step, length) =>
{
bool expected = false;
var collection = new EnumerableMock <int>(Enumerable.Range(0, length));
collection.EnumeratorCreated += e => { e.Current = () => { expected = true; throw new InvalidOperationException(); }; };
bool sut = false;
try
{
EnumerableExtensions.SliceDelete(collection, from, to, step).Sum();
}
catch (InvalidOperationException)
{
sut = true;
}
LazyAssert.True(sut == expected, () => ErrorFormatter.Format(sliceDeleteExceptionsAreNotHandledErrorFormat, from, to, step, length));
});
}
public void SliceDelete_FromEnumerableExtensions_CallsDisposeWhenExceptionWasThrownFromCurrent()
{
this.RunSliceTestCases((from, to, step, length) =>
{
var sut = new EnumerableMock <int>(Enumerable.Range(0, length));
sut.EnumeratorCreated += e => { e.Current = () => { throw new InvalidOperationException(); }; };
try
{
EnumerableExtensions.SliceDelete(sut, from, to, step).Sum();
}
catch (InvalidOperationException) { }
if (sut.Enumerators.Count > 0)
{
var disposeCallCount = sut.Enumerators.Single().DisposeCallCount;
LazyAssert.True(
disposeCallCount == 1,
() => ErrorFormatter.Format(sliceDeleteDisposeOnceErrorFormat, from, to, step, length, disposeCallCount));
}
});
}
