Testing - Interview Questions and Answers for 'Mocking' | Search Interview Question

Testing - Interview Questions and Answers for 'Mocking' - 10 question(s) found - Order By Newest

Q1. Which of the following is not the advantage of Mocking frameworks ?

a. It helps testing the module independently
b. It helps in faster unit testing
c. It helps in testing code even when external dependencies like service calls are not working
d. It helps in doing end to end Integration Testing

Ans. It helps in doing end to end Integration Testing

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Q2. What are the steps to be performed while coding Junit with Mocking framework ?

JUnit

Ans. Initialize required objects for working with mocks and tested method
Set the mock behaviour on dependent objects
Execute the tested method
Perform assertions
Verify if a method is invoked or not

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Q3. Name few Java Mocking frameworks ?

Ans. Mockito, PowerMock, EasyMock, JMock, JMockit

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Q4. Can we mock static methods ?

Testing

Ans. Yes we can use PowerMock. With Mockito , we cannot mock static methods.

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Q5. How do you use Mock frmaework to test webservices in any of your previous project ?

Testing

Ans. We were having client methods to call web services and were mocking the client method call using Mockito.

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Q6. How can you verify if there were interactions with a static method using PowerMock ?

PowerMock

Ans. We can use PowerMockito.verifyStatic for this purpose

PowerMockito.verifyStatic(VerificationModeFactory.times(1));
<Class_Name>.<static_method_name>;

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Q7. What does the following code

MockitoAnnotations.initMocks(this);

Mockito

Ans. Initializes objects annotated with Mockito annotations

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Q8. What is doCallRealMethod() method used for ?

PowerMock

Ans. When we Mock an object and then make a reference to any method using mocked object reference , java never makes a call to that method and looks for mocked value to be returned or null if none specified. But If we want that to be overridden and want java to make actual method call upon using mocked object reference, this method can be used.

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Q9. Does it make sense to mock integration calls during stress / load test ?

Testing

Ans. No, its usually not done.

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Q10. Can we mock private methods ?

PowerMock

Ans. Yes, using Power Mock.

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