Question

How would you assert code like this? What would be the best approach to do so?

public void doSomething(int myProperty){
    if (myProperty == 0) return;
    // If myProperty is not zero, do something in the method
}

Answer 1

You could assert that whatever happens after the return doesn’t happen when myProperty is zero.

For example, if the method is (pseudo code!)

if myProperty == 0 return

myOtherProperty = 2

then your unit test could

• Arrange that myProperty is set to zero, myOtherProperty is set to something other than 2
• Act by calling the method under test
• Assert that myOtherProperty is still set to what it was set to before.