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How to use StubbingWithDelegateTest class of org.mockitousage.stubbing package

Best Mockito code snippet using org.mockitousage.stubbing.StubbingWithDelegateTest

Source:StubbingWithDelegateTest.java

...14import org.mockito.exceptions.base.MockitoException;15import org.mockitousage.IMethods;16import org.mockitousage.MethodsImpl;17@SuppressWarnings("unchecked")18public class StubbingWithDelegateTest {19    public class FakeList<T> {20        private T value;21        public T get(int i) {22            return value;23        }24        public T set(int i, T value) {25            this.value = value;26            return value;27        }28        public int size() {29            return 10;30        }31        public ArrayList<T> subList(int fromIndex, int toIndex) {32            return new ArrayList<T>();33        }34    }35    public class FakeListWithWrongMethods<T> {36        public double size() {37            return 10;38        }39        public Collection<T> subList(int fromIndex, int toIndex) {40            return new ArrayList<T>();41        }42    }43    @Test44    public void when_not_stubbed_delegate_should_be_called() {45        List<String> delegatedList = new ArrayList<String>();46        delegatedList.add("un");47        List<String> mock = Mockito.mock(List.class, AdditionalAnswers.delegatesTo(delegatedList));48        mock.add("two");49        Assert.assertEquals(2, mock.size());50    }51    @Test52    public void when_stubbed_the_delegate_should_not_be_called() {53        List<String> delegatedList = new ArrayList<String>();54        delegatedList.add("un");55        List<String> mock = Mockito.mock(List.class, AdditionalAnswers.delegatesTo(delegatedList));56        Mockito.doReturn(10).when(mock).size();57        mock.add("two");58        Assert.assertEquals(10, mock.size());59        Assert.assertEquals(2, delegatedList.size());60    }61    @Test62    public void delegate_should_not_be_called_when_stubbed2() {63        List<String> delegatedList = new ArrayList<String>();64        delegatedList.add("un");65        List<String> mockedList = Mockito.mock(List.class, AdditionalAnswers.delegatesTo(delegatedList));66        Mockito.doReturn(false).when(mockedList).add(Mockito.anyString());67        mockedList.add("two");68        Assert.assertEquals(1, mockedList.size());69        Assert.assertEquals(1, delegatedList.size());70    }71    @Test72    public void null_wrapper_dont_throw_exception_from_org_mockito_package() throws Exception {73        IMethods methods = Mockito.mock(IMethods.class, AdditionalAnswers.delegatesTo(new MethodsImpl()));74        try {75            byte b = methods.byteObjectReturningMethod();// real method returns null76            Assert.fail();77        } catch (Exception e) {78            assertThat(e.toString()).doesNotContain("org.mockito");79        }80    }81    @Test82    public void instance_of_different_class_can_be_called() {83        List<String> mock = Mockito.mock(List.class, AdditionalAnswers.delegatesTo(new StubbingWithDelegateTest.FakeList<String>()));84        mock.set(1, "1");85        assertThat(mock.get(1).equals("1")).isTrue();86    }87    @Test88    public void method_with_subtype_return_can_be_called() {89        List<String> mock = Mockito.mock(List.class, AdditionalAnswers.delegatesTo(new StubbingWithDelegateTest.FakeList<String>()));90        List<String> subList = mock.subList(0, 0);91        assertThat(subList.isEmpty()).isTrue();92    }93    @Test94    public void calling_missing_method_should_throw_exception() {95        List<String> mock = Mockito.mock(List.class, AdditionalAnswers.delegatesTo(new StubbingWithDelegateTest.FakeList<String>()));96        try {97            mock.isEmpty();98            Assert.fail();99        } catch (MockitoException e) {100            assertThat(e.toString()).contains("Methods called on mock must exist");101        }102    }103    @Test104    public void calling_method_with_wrong_primitive_return_should_throw_exception() {105        List<String> mock = Mockito.mock(List.class, AdditionalAnswers.delegatesTo(new StubbingWithDelegateTest.FakeListWithWrongMethods<String>()));106        try {107            mock.size();108            Assert.fail();109        } catch (MockitoException e) {110            assertThat(e.toString()).contains("Methods called on delegated instance must have compatible return type");111        }112    }113    @Test114    public void calling_method_with_wrong_reference_return_should_throw_exception() {115        List<String> mock = Mockito.mock(List.class, AdditionalAnswers.delegatesTo(new StubbingWithDelegateTest.FakeListWithWrongMethods<String>()));116        try {117            mock.subList(0, 0);118            Assert.fail();119        } catch (MockitoException e) {120            assertThat(e.toString()).contains("Methods called on delegated instance must have compatible return type");121        }122    }123    @Test124    public void exception_should_be_propagated_from_delegate() throws Exception {125        final RuntimeException failure = new RuntimeException("angry-method");126        IMethods methods = Mockito.mock(IMethods.class, AdditionalAnswers.delegatesTo(new MethodsImpl() {127            @Override128            public String simpleMethod() {129                throw failure;130            }131        }));132        try {133            methods.simpleMethod();// delegate throws an exception134            Assert.fail();135        } catch (RuntimeException e) {136            assertThat(e).isEqualTo(failure);137        }138    }139    interface Foo {140        int bar();141    }142    @Test143    public void should_call_anonymous_class_method() throws Throwable {144        StubbingWithDelegateTest.Foo foo = new StubbingWithDelegateTest.Foo() {145            public int bar() {146                return 0;147            }148        };149        StubbingWithDelegateTest.Foo mock = Mockito.mock(StubbingWithDelegateTest.Foo.class);150        Mockito.when(mock.bar()).thenAnswer(AdditionalAnswers.delegatesTo(foo));151        // when152        mock.bar();153        // then no exception is thrown154    }155}...

StubbingWithDelegateTest

Using AI Code Generation

1package org.mockitousage.stubbing;2import static org.mockito.Mockito.*;3import org.junit.Test;4import org.mockito.Mock;5import org.mockito.Mockito;6import org.mockitousage.IMethods;7import org.mockitoutil.TestBase;8public class StubbingWithDelegateTest extends TestBase {9    static class Foo {10        public String bar() {11            return "bar";12        }13    }14    static class FooDelegate implements IMethods {15        public String simpleMethod() {16            return "foo";17        }18    }19    @Mock FooDelegate delegate;20    public void shouldStubWithDelegate() {21        Foo foo = Mockito.mock(Foo.class, withSettings()22            .defaultAnswer(CALLS_REAL_METHODS)23            .useConstructor()24            .defaultAnswer(delegateTo(delegate)));25        when(delegate.simpleMethod()).thenReturn("bar");26        assertEquals("bar", foo.bar());27        assertEquals("bar", delegate.simpleMethod());28    }29}

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