public void SettingANewSourceWithoutInvalidateCausesNoInvalidation()
{
var sut = new SourceSelectPipelineStage <string>("", "".AsPipelineConstant());
var test = sut.AttachTestStage();
Assert.IsTrue(sut.SetSourceWithoutInvalidating("Derpface".AsPipelineConstant()));
test.AssertInvalidations(0);
}
public void ValueIsTakenFromCurrentSource()
{
var sut = new SourceSelectPipelineStage <string>("", "Hello, World?".AsPipelineConstant());
PipelineAssert.Value(sut, "Hello, World?");
sut.SetSource("Whazzup?".AsPipelineConstant());
PipelineAssert.Value(sut, "Whazzup?");
sut.SetSourceWithoutInvalidating("Yo!".AsPipelineConstant());
PipelineAssert.Value(sut, "Yo!");
}
public void SettingANewSourceRemovesOldDependencyANdAddsNew()
{
var input = 1.AsPipelineConstant();
var sut = new SourceSelectPipelineStage <int>("", input);
PipelineAssert.DependentOn(sut, input);
var input2 = 2.AsPipelineConstant();
sut.SetSource(input2);
PipelineAssert.NotDependentOn(sut, input);
PipelineAssert.DependentOn(sut, input2);
var input3 = 3.AsPipelineConstant();
sut.SetSourceWithoutInvalidating(input3);
PipelineAssert.NotDependentOn(sut, input2);
PipelineAssert.DependentOn(sut, input3);
}
/// <summary>
/// Adds an update to an <see cref="SourceSelectPipelineStage{TValue}"/>.
/// </summary>
/// <typeparam name="TValue">The data type.</typeparam>
/// <param name="transaction">The transaction.</param>
/// <param name="stage">The stage to set value for.</param>
/// <param name="newSource">The new source.</param>
/// <returns>The same transaction object.</returns>
public static IPipelineTransaction Update <TValue>(this IPipelineTransaction transaction, SourceSelectPipelineStage <TValue> stage, IPipelineStage <TValue> newSource)
{
bool SourceSelectUpdate() => stage.SetSourceWithoutInvalidating(newSource);
return(transaction.Update(stage, SourceSelectUpdate));
}