Mockito in Java Concepts

What is Mockito?

• Mockito is a testing framework for Python.

• Mockito is a mocking framework for Java.

• Mockito is a front-end development tool.

• Mockito is used for database management.

Explain the difference between mock and spy in Mockito.

• A mock executes real code, while a spy simulates a real object

• A mock is a real object that allows real method calls, while a spy simulates a real object

• A mock is used for integration testing, while a spy is used for unit testing

• A mock simulates a real object without executing code, while a spy is a real object that allows real method calls.

How do you mock a method in Mockito?

• Use the when-thenReturn syntax in Mockito

• Use the when-then syntax in Mockito

• Use the given-when syntax in Mockito

• Use the given-then syntax in Mockito

What is the purpose of @Mock annotation in Mockito?

• To create real objects for testing purposes.

• To generate random data for testing purposes.

• To automatically run test cases in Mockito.

• To create mock objects for testing purposes.

What is the significance of @InjectMocks annotation in Mockito?

• It generates random data for testing purposes.

• It injects mocks/spies into the class under test.

• It creates new mocks for the class under test.

• It validates the test cases in Mockito.

How do you verify a method is called with specific arguments in Mockito?

• Mockito.verify(mockObject).methodName(argumentMatcher)

• Mockito.verify(mockObject).methodName(wrongArgumentMatcher)

• Mockito.verify(mockObject).wrongMethodName(argumentMatcher)

• Mockito.verify(wrongMockObject).methodName(argumentMatcher)

What is the difference between doReturn() and when() in Mockito?

• doReturn() is for stubbing, when() is for defining behavior

• doReturn() is for mocking, when() is for verifying

• doReturn() is for stubbing, when() is for verifying

• doReturn() is for verifying, when() is for mocking

Explain the concept of stubbing in Mockito.

• Stubbing in Mockito is the process of removing unwanted behavior from mock objects

• Stubbing in Mockito involves using the given-thenReturn or given-thenThrow methods

• Stubbing in Mockito is only applicable to real objects, not mocks

• Stubbing in Mockito involves using the when-thenReturn or when-thenThrow methods to specify the return values or exceptions for method calls on mock objects.

What is the use of @Captor annotation in Mockito?

• To skip verification of Mockito mocks

• To mock static methods in Mockito

• To capture arguments for verification in Mockito

• To define custom behavior for Mockito mocks

How do you mock void methods in Mockito?

• doReturn(null).when(someClassInstance).methodName();

• doNothing().when(someClassInstance).methodName();

• doCallRealMethod().when(someClassInstance).methodName();

• doThrow(new RuntimeException()).when(someClassInstance).methodName();