public void Dispatch_BuildGenericCommandHandlerAndGetFromContainer_ShouldHandleCommand(
[Frozen] Mock<IContainer> container,
[Frozen] Mock<ICommandHandler<FakeCommand>> commandHandler,
FakeCommand command,
CommandDispatcher dispatcher)
{
// Arrange
var genericTypeName = typeof (ICommandHandler<FakeCommand>).FullName;
container.Setup(c => c.GetInstance(It.Is<Type>(t => t.FullName == genericTypeName)))
.Returns(commandHandler.Object);
// Act
dispatcher.Dispatch(command);
// Assert
commandHandler.Verify(t => t.Handle(command), Times.Once);
}
public void Dispatch_CommandThrowsCommandException_ShouldHandleExceptionAndRethrow(
[Frozen] Mock<IContainer> container,
[Frozen] Mock<ICommandHandler<ICommand>> commandHandler,
FakeCommand command,
CommandDispatcher dispatcher)
{
// Arrange
var commandException = new CommandException("Exception");
commandHandler.Setup(h => h.Handle(It.IsAny<FakeCommand>())).Throws(commandException);
var genericTypeName = typeof(ICommandHandler<FakeCommand>).FullName;
container.Setup(c => c.GetInstance(It.Is<Type>(t => t.FullName == genericTypeName)))
.Returns(commandHandler.Object);
var commandExceptionGenericTypeName = typeof(ICommandHandler<CommandException>).FullName;
container.Setup(c => c.GetInstance(It.Is<Type>(t => t.FullName == commandExceptionGenericTypeName)))
.Returns(commandHandler.Object);
// Act
Assert.Throws<CommandException>(() => dispatcher.Dispatch(command));
// Assert
commandHandler.Verify(t => t.Handle(command), Times.Once);
commandHandler.Verify(h => h.Handle(commandException), Times.Once);
}
public void Dispatch_NullCommand_ThrowsArgumentNullException(CommandDispatcher dispatcher)
{
Assert.Throws<ArgumentNullException>(() => dispatcher.Dispatch(null));
}
public void Dispatch_CommandThrowsActivationException_ShouldThrowCommandHandlerNotFoundException(
[Frozen] Mock<IContainer> container,
[Frozen] Mock<ICommandHandler<ICommand>> commandHandler,
FakeCommand command,
CommandDispatcher dispatcher)
{
// Arrange
commandHandler.Setup(h => h.Handle(It.IsAny<FakeCommand>())).Throws<Exception>();
container.Setup(c => c.GetInstance(It.IsAny<Type>())).Throws<Exception>();
container.Setup(c => c.IsActivationException(It.IsAny<Exception>())).Returns(true);
// Act and assert
Assert.Throws<CommandHandlerNotFoundException>(() => dispatcher.Dispatch(command));
}