private static void InitializeApplicationCommands()
{
commandContainer.AddCommand("--help", new HelpCommand());
commandContainer.AddCommand("--gen-keys", new GenKeysCommand());
commandContainer.AddCommand("--encrypt", new EncryptCommand());
commandContainer.AddCommand("--decrypt", new DecryptCommand());
}
public void TestCommandDispatch()
{
var inputReaderMock = new Mock <IInputReader>();
// Create a fake command. We want to test if it is executed.
//
var commandMock = new Mock <ICommand>();
// Let accept return false always.
//
commandMock.Setup(x => x.Accept(
It.IsAny <string>(),
It.IsAny <List <string> >()))
.Returns(false);
var commandContainer = new CommandContainer(inputReaderMock.Object);
commandContainer.AddCommand(commandMock.Object);
// Define our MOCK functionality of the StartInputLoop method. If this method is called
// our MOCK will act as a user providing a single input.
//
inputReaderMock
.Setup(x => x.StartInputLoop()).Raises((x) =>
// Notice this += is a trick the Mock library uses to fire events.
x.InputEntered += null, this, new InputReadEventArgs("unknown command"));
// Start the fake input loop, this will simulate a user input of "unknown command".
// We expect the commandMock to not accept the input. The MOCK library will remember what happened.
//
inputReaderMock.Object.StartInputLoop();
// We now check if our methods were called with the correct input. We tested what would happen if
// the user entered "unknown command".
// We expect that Accept() was called on the command mock once, and Execute() never.
//
// Set up the Execute() method of the mock, we expect it to be never called in this test.
//
commandMock.Verify(x =>
x.Execute(It.IsAny <List <string> >()), // The It class can be used to check the parameters supplied to the method.
Times.Never); // We expect the execute to not be called for the wrong command.
// Set up the mock for the Accept() method and add some constraints we expect on the parameter.
// This lets us test with what parameters and how often a method was called.
//
commandMock.Verify(x => x.Accept(
// Tests the first parameter was of value "unknown"
It.Is <string>((input) => input == "unknown"),
// Tests the input was correctly split and the argument is a list containing one
// entry with the value "command"
It.Is <List <string> >((input) => input.Count == 1 && input[0] == "command")),
Times.Once // We expect this method to be called exactly once.
);
}
[ExpectedException(typeof(ArgumentNullException))] // Tell the runtime to expect an exception to be thrown in this test
public void TestAdd()
{
// We can not use the ConsoleInputReader to do most of the testing of the CommandContainer.
// For one, it uses an infinite loop and also it expects user inputs. Tests should run
// automatically without user input. We therefore create a MOCK of the interface. In this case
// the MOCK does nothing.
//
var inputReaderMock = new Mock <IInputReader>();
var commandContainer = new CommandContainer(inputReaderMock.Object); // supply the mock object to the class
// The test expects this call to throw an ArgumentNullException. If this call does not throw
// this exact exception, the test will fail.
//
commandContainer.AddCommand(null);
}
