Testing - Interview Questions and Answers for 'Unit testing' | Search Interview Question

Testing - Interview Questions and Answers for 'Unit testing' - 7 question(s) found - Order By Rating

Q1. What is doCallRealMethod() method used for ?

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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Q2. Difference between Assert and Verify ?

Testing

Ans. Assert works only if assertions ( -ea ) are enabled which is not required for Verify.Assert throws an exception and hence doesn't continue with the test if assert evaluates to false whereas it's not so with Verify.

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Q3. How should we ignore or avoid executing set of tests ?

Ans. We can remove @Test from the respective test so as to avoid its execution. Alternatively we can put @Ignore annotation on the Junit file if we want to ignore all tests in a particular file.

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Q4. 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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Q5. How to perform a clean install without executing Tests ?

Maven

Ans. mvn clean install -Dmaven.test.skip=true

or

mvn install -DskipTests

or

org.apache.maven.plugins
maven-surefire-plugin

true

within parent POM file.

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Q6. Which of the following annotation is used to avoid executing Junits ?

a. @explicit
b. @ignore
c. @avoid
d. @NoTest

Ans. @ignore

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Q7. 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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