How to mock InitialContext constructor in unit testing

Question

when I try to mock following method(Method is using remote EJB call for business logic) for the Junit test, it gives javax.naming.NoInitialContextException

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Answer 1

As of now (PowerMock 1.7.4)

Create a mock using PowerMockito.mock(InitialContext.class) rather than PowerMockito.createMock(InitialContext.class)

@Test
public void connectTest() {
    String jndi = "jndi";
    InitialContext initialContextMock = PowerMockito.mock(InitialContext.class);
    ConnectionFactory connectionFactoryMock = PowerMockito.mock(ConnectionFactory.class);

    PowerMockito.whenNew(InitialContext.class).withNoArguments().thenReturn(initialContextMock);
    when(initialContextMock.lookup(jndi)).thenReturn(connectionFactoryMock);  

    ...

    // Your asserts go here ...
}

Do not create the InitialContext manually but let PowerMock do it for you. Also do not create a spy in which PowerMock expects an object. This means that you need to create the InitialContext instance.