public void ExtractorIsUsedToCalculateNewDelta(int old, int @new, int expected)
{
var input = PipelineTestHelper.Assignable(old);
var sut = new LazyDeltaPipelineStage <int, int>("", Extractor, input);
var test = sut.AttachTestStage();
input.SetValue(@new);
test.AssertInvalidations(1);
PipelineAssert.Value(sut, expected);
}
public void InvalidationIsPropagatedWithoutAnyGetValueBeingCalled()
{
var assignable = PipelineTestHelper.Assignable(0);
var test = assignable.AttachTestStage();
var sut = new LazyDeltaPipelineStage <int, int>("", Extractor, test);
var sutTest = sut.AttachTestStage();
test.AssertInvalidationsAndRetrievals(0, 1);
assignable.Invalidate();
test.AssertInvalidationsAndRetrievals(1, 1);
sutTest.AssertInvalidationsAndRetrievals(1, 0);
}