JMock Classes without a setter

[Tim Holmes]

Hey guys,

I am using JMock and my class under test calls certain other classes. The classes that are called are not injected into my class under test. I know how to inject mocked objects with a setter, but what do I do for classes under test that call other classes and my class doesn't have a setter to inject that mocked object?

public class ClassUnderTest {

	public void tryIt() throws Exception {
                //how do I test this class since I don't have a setter for it on my ClassUnderTest?
		DOMParser parser = new DOMParser();
		parser.parse("test");
	}
}

[Jeanne Boyarsky]

Refactor! Seriously, what are you trying to inject. The string "test" or something else?

[Tim Holmes]

Um I don't think you understood the question. I am not trying to inject anything. I am trying to mock DOMParser. This is just an example.

[Jeanne Boyarsky]

You can't mock the Dom parser. You can avoid the call in test mode. Or wrap it in a class/interface you can mock.

[Tim Holmes]

How do you avoid the call in "test mode"?

[Jeanne Boyarsky]

Tim Holmes wrote:How do you avoid the call in "test mode"?

It's hard to recommend without seeing the surrounding code. The most common ways are:

Put the code you don't want to call in a protected method. Create another class that subclasses the real class and overrides that method to do nothing. (or set values/simulate a call/etc)

Use a boolean flag to control whether a segment of code is run. This can be externalized to a property file or environment setting for a test mode.