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POMocking Reflection based calls
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  1. POMocking Reflection based calls
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    copied!<p>I am trying to mock some reflection based methods. Below you can see the details,</p> <p>Class Under Test</p> <pre><code>public class TracerLog { @AroundInvoke public Object logCall(InvocationContext context) throws Exception { Logger logger = new Logger(); String message = "INFO: Invoking method - " + context.getMethod().getName() + "() of Class - " + context.getMethod().getDeclaringClass(); logger.write(message); return context.proceed(); } } </code></pre> <p>Test</p> <pre><code>public class TracerLogTest { @Mock InvocationContext mockContext; @Mock Logger mockLogger; @InjectMocks private TracerLog cut = new TracerLog(); @BeforeMethod public void setup() { MockitoAnnotations.initMocks(this); } @Test public void logCallTest() throws Exception { when(mockContext.proceed()).thenReturn(true); when(mockContext.getMethod().getDeclaringClass().getName()).thenReturn("someClass"); cut.logCall(mockContext); verify(mockContext).proceed(); } </code></pre> <p>}</p> <p>or</p> <pre><code>@Test public void logCallTest() throws Exception { when(mockContext.proceed()).thenReturn(true); when(mockContext.getMethod().getName()).thenReturn("someMethod"); when(mockContext.getMethod().getDeclaringClass().getName()).thenReturn("someClass"); cut.logCall(mockContext); verify(mockLogger).write(anyString()); verify(mockContext).proceed(); } </code></pre> <p>But, the tests fail with a NullPointerException. I understand that I am doing something wrong against mocking concepts, but I do not understand what it is. Could you please throw some light on it and also suggest me how this method can be tested?</p> <p>Thanks.</p>
 

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