How to use answer_returns_null_for_generic_parameter method of org.mockito.internal.stubbing.answers.DoesNothingTest class

Best Mockito code snippet using org.mockito.internal.stubbing.answers.DoesNothingTest.answer_returns_null_for_generic_parameter

Source:DoesNothingTest.java

...46    public void validateFor_voidObjectReturnType() throws Throwable {47        doesNothing().validateFor(invocation_Void);48    }49    @Test50    public void answer_returns_null_for_generic_parameter() {51        SubclassWithGenericParameter mock = mock(SubclassWithGenericParameter.class);52        doNothing().when(mock).methodReturningT();53    }54    static class SuperClassWithGenericParameter<T> {55        T methodReturningT() {56            return null;57        }58    }59    static class SubclassWithGenericParameter extends SuperClassWithGenericParameter<Void> {}60}...

answer_returns_null_for_generic_parameter

Using AI Code Generation

1public class DoesNothingTest {2    public void answer_returns_null_for_generic_parameter() {3        DoesNothing doesNothing = new DoesNothing();4        assertNull(doesNothing.answer(new InvocationOnMock() {5            public Object getMock() {6                return null;7            }8            public Method getMethod() {9                try {10                    return String.class.getMethod("length");11                } catch (Exception e) {12                    throw new RuntimeException(e);13                }14            }15            public Object[] getArguments() {16                return new Object[0];17            }18            public Object callRealMethod() {19                return null;20            }21            public Type[] getGenericParameterTypes() {22                return new Type[] { String.class };23            }24            public Type getGenericReturnType() {25                return String.class;26            }27        }));28    }29}30public class DoesNothing implements Answer<Object> {31    public Object answer(InvocationOnMock invocation) {32        return null;33    }34}35public class ReturnsArgumentAt implements Answer<Object> {36    private final int index;37    public ReturnsArgumentAt(int index) {38        this.index = index;39    }40    public Object answer(InvocationOnMock invocation) throws Throwable {41        Object[] args = invocation.getArguments();42        if (index >= args.length) {43            throw new RuntimeException("Argument index out of bounds: " + index);44        }45        return args[index];46    }47}48public class ReturnsArgumentsAt implements Answer<Object> {49    private final int[] indices;50    public ReturnsArgumentsAt(int[] indices) {51        this.indices = indices;52    }53    public Object answer(InvocationOnMock invocation) throws Throwable {54        Object[] args = invocation.getArguments();55        Object[] result = new Object[indices.length];56        for (int i = 0; i < indices.length; i++) {57            result[i] = args[indices[i]];58        }59        return result;60    }61}

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