How to use shouldStubUsingMatchers method of org.mockitousage.matchers.CustomMatcherDoesYieldCCETest class

Best Mockito code snippet using org.mockitousage.matchers.CustomMatcherDoesYieldCCETest.shouldStubUsingMatchers

shouldStubUsingMatchers

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1 public void shouldStubUsingMatchers() {2 List mock = mock(List.class);3 when(mock.get(anyInt())).thenThrow(new RuntimeException());4 try {5 mock.get(0);6 fail();7 } catch (RuntimeException e) {8 }9 }10 at org.mockitousage.matchers.CustomMatcherDoesYieldCCETest.shouldStubUsingMatchers(CustomMatcherDoesYieldCCETest.java:22)11 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)12 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)13 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)14 at java.lang.reflect.Method.invoke(Method.java:498)15 at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)16 at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)17 at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)18 at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)19 at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)20 at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)21 at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)22 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)23 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)24 at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)25 at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)26 at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)27 at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)28 at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)29 at org.junit.runners.ParentRunner.run(ParentRunner.java:363)

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shouldStubUsingMatchers

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1JVM name : Java HotSpot(TM) 64-Bit Server VM2 at org.mockito.internal.creation.MockFactory.createMock(MockFactory.java:51)3 at org.mockito.internal.creation.MockFactory.createMock(MockFactory.java:32)4 at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:35)5 at org.mockito.internal.MockitoCore.mock(MockitoCore.java:59)6 at org.mockito.Mockito.mock(Mockito.java:1213)7 at org.mockito.Mockito.mock(Mockito.java:1207)8 at org.mockito.usage.matchers.CustomMatcherDoesYieldCCETest.shouldStubUsingMatchers(CustomMatcherDoesYieldCCETest.java:36)9 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)10 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)11 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)12 at java.lang.reflect.Method.invoke(Method.java:597)13 at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)14 at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)15 at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)16 at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)17 at org.junit.runners.ParentRunner.runLeaf(P

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What do you want it to do?

You can set it to RETURN_SMART_NULLS, which avoids the NPE and includes some useful info.

You could replace this with a custom implementation, for example, that throws an exception from its answer method:

@Test
public void test() {
    Object mock = Mockito.mock(Object.class, new NullPointerExceptionAnswer());
    String s = mock.toString(); // Breaks here, as intended.
    assertEquals("", s);
}

class NullPointerExceptionAnswer<T> implements Answer<T> {
    @Override
    public T answer(InvocationOnMock invocation) throws Throwable {
        throw new NullPointerException();
    }
}
https://stackoverflow.com/questions/8003278/is-it-possible-to-do-strict-mocks-with-mockito

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Most used method in CustomMatcherDoesYieldCCETest