public void Visit_applies_handlers_to_every_context_in_a_context_hierarchy()
{
// Arrange
var fixture = new Fixture();
new RenderingContextCustomisation().Customize(fixture);
var contexts = Enumerable.Range(0,7).Select(x => fixture.Create<RenderingContext>()).ToArray();
var topContext = contexts[0];
RenderingContext[]
secondContexts = contexts.Skip(1).Take(2).ToArray(),
thirdContexts = contexts.Skip(3).Take(2).ToArray(),
fourthContexts = contexts.Skip(5).Take(2).ToArray();
var handlers = Enumerable.Range(0, 2).Select(x => new Mock<IAttributeHandler>(MockBehavior.Strict)).ToArray();
handlers[0]
.Setup(x => x.Handle(topContext))
.Returns((RenderingContext ctx) => new AttributeHandlingResult(secondContexts, true));
handlers[1]
.Setup(x => x.Handle(secondContexts[0]))
.Returns((RenderingContext ctx) => new AttributeHandlingResult(thirdContexts, true));
handlers[1]
.Setup(x => x.Handle(secondContexts[1]))
.Returns((RenderingContext ctx) => new AttributeHandlingResult(fourthContexts, true));
var expectedContexts = thirdContexts.Union(fourthContexts);
var sut = new TalVisitor(handlers: handlers.Select(x => x.Object).ToArray(),
errorHandler: Mock.Of<IAttributeHandler>());
// Act
var result = sut.Visit(topContext);
// Assert
Assert.NotNull(result, "Result nullability");
try
{
CollectionAssert.AreEquivalent(expectedContexts, result, "All expected contexts returned");
}
catch(AssertionException)
{
_logger.ErrorFormat("{0} contexts returned", result.Count());
throw;
}
}
public void Visit_visits_newly_exposes_contexts()
{
// Arrange
var fixture = new Fixture();
new RenderingContextCustomisation().Customize(fixture);
var contexts = Enumerable.Range(0,3).Select(x => fixture.Create<RenderingContext>()).ToArray();
RenderingContext
topContext = contexts[0],
secondContext = contexts[1],
thirdContext = contexts[2];
var handler = new Mock<IAttributeHandler>(MockBehavior.Strict);
handler
.Setup(x => x.Handle(topContext))
.Returns(new AttributeHandlingResult(new RenderingContext[0], true, new [] { secondContext }));
handler
.Setup(x => x.Handle(secondContext))
.Returns(new AttributeHandlingResult(new [] { thirdContext }, true));
var expectedElements = new [] { thirdContext };
var sut = new TalVisitor(handlers: new [] { handler.Object },
errorHandler: Mock.Of<IAttributeHandler>());
// Act
var result = sut.Visit(topContext);
// Assert
Assert.NotNull(result, "Result nullability");
Assert.IsTrue(expectedElements.Intersect(result).Count() == expectedElements.Count(),
"All expected elements contained");
Assert.IsTrue(result.Intersect(expectedElements).Count() == result.Count(),
"No unwanted elements contained");
}