public void Handle_InvokesDecoratedHandle_WhenValidationPasses()
{
var command = new FakeCommandWithValidator();
var decorated = new Mock <IHandleCommand <FakeCommandWithValidator> >(MockBehavior.Strict);
var validator = new Mock <IValidator <FakeCommandWithValidator> >(MockBehavior.Strict);
Expression <Func <FakeCommandWithValidator, bool> > expectedCommand = x => ReferenceEquals(x, command);
var expectedResult = new ValidationResult();
validator.Setup(x => x.Validate(It.Is(expectedCommand))).Returns(expectedResult);
decorated.Setup(x => x.Handle(It.Is(expectedCommand))).Returns(Task.FromResult(0));
var decorator = new ValidateCommandDecorator <FakeCommandWithValidator>(decorated.Object, validator.Object);
decorator.Handle(command).Wait();
validator.Verify(x => x.Validate(It.Is(expectedCommand)), Times.Once);
decorated.Verify(x => x.Handle(It.Is(expectedCommand)), Times.Once);
}
public void Handle_ThrowsValidationException_AndDoesNotInvokeDecoratedHandle_WhenValidationFails()
{
var command = new FakeCommandWithValidator();
var decorated = new Mock <IHandleCommand <FakeCommandWithValidator> >(MockBehavior.Strict);
var validator = new Mock <IValidator <FakeCommandWithValidator> >(MockBehavior.Strict);
Expression <Func <FakeCommandWithValidator, bool> > expectedCommand = x => ReferenceEquals(x, command);
var expectedResult = new ValidationResult(new[] { new ValidationFailure("Name", "Invalid.", command.ReturnValue), });
validator.Setup(x => x.Validate(It.Is(expectedCommand))).Returns(expectedResult);
var decorator = new ValidateCommandDecorator <FakeCommandWithValidator>(decorated.Object, validator.Object);
var exception = Assert.Throws <ValidationException>(() => decorator.Handle(command));
exception.ShouldNotBeNull();
validator.Verify(x => x.Validate(It.Is(expectedCommand)), Times.Once);
decorated.Verify(x => x.Handle(It.IsAny <FakeCommandWithValidator>()), Times.Never);
}