Command an query handlers

gistfile1.txt

[TestMethod()]
public void Foo_should_start_mspaint()
{
	var cmdHandler = new Mock<ICommandHandler>();
	var qryHandler = new Mock<IQueryHandler>();

	var controller = new Controller(cmdHandler.Object, qryHandler.Object);

	controller.Foo("mspaint.exe");
	
	cmdHandler.Verify(h => h.Execute(It.Is<StartProcessCommand>(c => c.Filename == "mspaint.exe")));
}

[TestMethod()]
public void Foo_should_return_the_number_of_processes()
{
	var cmdHandler = new Mock<ICommandHandler>();
	var qryHandler = new Mock<IQueryHandler>();

	qryHandler
		.Setup(h => h.Execute<int>(It.IsAny<ProcessCountQuery>()))
		.Returns(4);
	
	var controller = new Controller(cmdHandler.Object, qryHandler.Object);

	Assert.AreEqual(4, controller.Foo("test.exe"));
}