Mocking a class for Testing

[hotinlavacoolinjava]

If I have a class called Library with a method as shown below

public String searchForBook(){
String bookNumberToBeSearched = new InputAndOutputHandling().obtainStringFromKeyboard( "Book Number");
.........
.........
}

where


class InputAndOutputHandling {

public String obtainStringFromKeyboard(String anotherString) {
.................
.................
}
}

If i am writing a test for Library class and the method shown above, how will i mock the IO handling class so that i can mock the keyboard entry.

I tried doing this with mockito

InputAndOutputHandling ioHandling = mock(InputAndOutputHandling.class);
when(ioHandling.obtainStringFromKeyboard("Book Number")).thenReturn("1");


But it isnt working.

Can anyone help?

[r035198x]

What do you mean by "It isn't" working? What testing/mocking libraries are you using?

[hotinlavacoolinjava]

im using mockito..

by isnt working i mean, i dont think i am able to mock using the about piece of code.. when i am testing, its asking for the keyboard input.

[r035198x]

Then you need to read the manuals that came with your mocking libraries. I, for one, don't use that one but if I wanted to know how it works I would check the manuals for it.

[hotinlavacoolinjava]

I did find the solution. The mocked class has to be passed into the class which you are testing. I had not done that.... Its fine now.......