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How to use VerificationCollector class of org.mockito.junit package

Best Mockito code snippet using org.mockito.junit.VerificationCollector

Source:VerificationCollectorImplTest.java

...8import org.junit.runner.JUnitCore;9import org.junit.runner.Result;10import org.mockito.exceptions.base.MockitoAssertionError;11import org.mockito.junit.MockitoJUnit;12import org.mockito.junit.VerificationCollector;13import org.mockitousage.IMethods;14import static org.assertj.core.api.Assertions.assertThat;15import static org.junit.Assert.fail;16import static org.mockito.Mockito.*;17public class VerificationCollectorImplTest {18    @Test19    public void should_not_throw_any_exceptions_when_verifications_are_successful() {20        VerificationCollector collector = MockitoJUnit.collector().assertLazily();21        IMethods methods = mock(IMethods.class);22        methods.simpleMethod();23        verify(methods).simpleMethod();24        collector.collectAndReport();25    }26    @Test(expected = MockitoAssertionError.class)27    public void should_collect_verification_failures() {28        VerificationCollector collector = MockitoJUnit.collector().assertLazily();29        IMethods methods = mock(IMethods.class);30        verify(methods).simpleMethod();31        collector.collectAndReport();32    }33    @Test34    public void should_collect_multiple_verification_failures() {35        VerificationCollector collector = MockitoJUnit.collector().assertLazily();36        IMethods methods = mock(IMethods.class);37        verify(methods).simpleMethod();38        verify(methods).byteReturningMethod();39        try {40            collector.collectAndReport();41            fail();42        } catch (MockitoAssertionError error) {43            assertThat(error).hasMessageContaining("1. Wanted but not invoked:");44            assertThat(error).hasMessageContaining("2. Wanted but not invoked:");45        }46    }47    @Test48    public void should_only_collect_failures_ignore_successful_verifications() {49        VerificationCollector collector = MockitoJUnit.collector().assertLazily();50        IMethods methods = mock(IMethods.class);51        verify(methods, never()).simpleMethod();52        verify(methods).byteReturningMethod();53        this.assertAtLeastOneFailure(collector);54    }55    @Test56    public void should_continue_collecting_after_failing_verification() {57        VerificationCollector collector = MockitoJUnit.collector().assertLazily();58        IMethods methods = mock(IMethods.class);59        methods.simpleMethod();60        verify(methods).byteReturningMethod();61        verify(methods).simpleMethod();62        this.assertAtLeastOneFailure(collector);63    }64    private void assertAtLeastOneFailure(VerificationCollector collector) {65        try {66            collector.collectAndReport();67            fail();68        } catch (MockitoAssertionError error) {69            assertThat(error).hasMessageContaining("1. Wanted but not invoked:");70            assertThat(error.getMessage()).doesNotContain("2.");71        }72    }73    @Test74    public void should_invoke_collector_rule_after_test() {75        JUnitCore runner = new JUnitCore();76        Result result = runner.run(VerificationCollectorRuleInner.class);77        assertThat(result.getFailureCount()).isEqualTo(1);78        assertThat(result.getFailures().get(0).getMessage()).contains("1. Wanted but not invoked:");79    }80    // This class is picked up when running a test suite using an IDE. It fails on purpose.81    public static class VerificationCollectorRuleInner {82        @Rule83        public VerificationCollector collector = MockitoJUnit.collector();84        @Test85        public void should_fail() {86            IMethods methods = mock(IMethods.class);87            verify(methods).simpleMethod();88        }89        @Test90        public void should_not_fail() {91            IMethods methods = mock(IMethods.class);92            methods.simpleMethod();93            verify(methods).simpleMethod();94        }95    }96}...

Source:VerificationCollector.java

...10 * Use this rule in order to collect multiple verification failures and report at once.11 * This new API in incubating - let us know if you find this feature useful.12 * Should it be turned on by default with Mockito JUnit Rule?13 * <p>14 * Although {@code VerificationCollector} is a JUnit Rule, it does not necessarily have to be used as a Test Rule15 * - see {@link #collectAndReport()}.16 * <p>17 * In the example below, the verification failure thrown by {@code byteReturningMethod()} does not block18 * verifying against the {@code simpleMethod()}. After the test is run, a report is generated stating all19 * collect verification failures.20 *21 * <pre class="code"><code class="java">22 *   &#064;Rule23 *   public VerificationCollector collector = MockitoJUnit.collector();24 *25 *   &#064;Test26 *   public void should_fail() {27 *       IMethods methods = mock(IMethods.class);28 *29 *       verify(methods).byteReturningMethod();30 *       verify(methods).simpleMethod();31 *   }32 * </code></pre>33 *34 * @see org.mockito.Mockito#verify(Object)35 * @see org.mockito.Mockito#verify(Object, org.mockito.verification.VerificationMode)36 * @since 2.1.037 */38@Incubating39public interface VerificationCollector extends TestRule {40    /**41     * Collect all lazily verified behaviour. If there were failed verifications, it will42     * throw a MockitoAssertionError containing all messages indicating the failed verifications.43     * <p>44     * Normally, users don't need to call this method because it is automatically invoked when test finishes45     * (part of the JUnit Rule behavior).46     * However, in some circumstances and edge cases, it might be useful to collect and report verification47     * errors in the middle of the test (for example: some scenario tests or during debugging).48     *49     * <pre class="code"><code class="java">50     *   &#064;Rule51     *   public VerificationCollector collector = MockitoJUnit.collector();52     *53     *   &#064;Test54     *   public void should_fail() {55     *       IMethods methods = mock(IMethods.class);56     *57     *       verify(methods).byteReturningMethod();58     *       verify(methods).simpleMethod();59     *60     *       //report all verification errors now:61     *       collector.collectAndReport();62     *63     *       //some other test code64     *   }65     * </code></pre>66     *67     * @throws MockitoAssertionError If there were failed verifications68     * @since 2.1.069     */70    @Incubating71    void collectAndReport() throws MockitoAssertionError;72    /**73     * Enforce all verifications are performed lazily. This method is automatically called when74     * used as JUnitRule and normally users don't need to use it.75     * <p>76     * You should only use this method if you are using a VerificationCollector77     * inside a method where only this method should be verified lazily. The other methods can78     * still be verified directly.79     *80     * <pre class="code"><code class="java">81     *   &#064;Test82     *   public void should_verify_lazily() {83     *       VerificationCollector collector = MockitoJUnit.collector().assertLazily();84     *85     *       verify(methods).byteReturningMethod();86     *       verify(methods).simpleMethod();87     *88     *       collector.collectAndReport();89     *   }90     * </code></pre>91     *92     * @return this93     * @since 2.1.094     */95    @Incubating96    VerificationCollector assertLazily();97}...

Source:LazyVerificationUnitTest.java

...5import java.util.List;6import org.junit.Test;7import org.mockito.exceptions.base.MockitoAssertionError;8import org.mockito.junit.MockitoJUnit;9import org.mockito.junit.VerificationCollector;10public class LazyVerificationUnitTest {11    @Test12    public void whenLazilyVerified_thenReportsMultipleFailures() {13        VerificationCollector collector = MockitoJUnit.collector()14            .assertLazily();15        List mockList = mock(List.class);16        verify(mockList).add("one");17        verify(mockList).clear();18        try {19            collector.collectAndReport();20        } catch (MockitoAssertionError error) {21            assertTrue(error.getMessage()22                .contains("1. Wanted but not invoked:"));23            assertTrue(error.getMessage()24                .contains("2. Wanted but not invoked:"));25        }26    }27}...

Source:LazyVerificationTest.java

1package com.uj.study.mockito2.lazyVerification;2import org.junit.Rule;3import org.junit.Test;4import org.mockito.junit.MockitoJUnit;5import org.mockito.junit.VerificationCollector;6import java.util.ArrayList;7import java.util.List;8import static org.mockito.Mockito.mock;9import static org.mockito.Mockito.verify;10/**11 * Without VerificationCollector rule, only the first verification gets reported:12 *13 * 114 * 215 * 316 * 417 * Wanted but not invoked:18 * arrayList.add("one");19 * -> at com.baeldung.mockito.java8.LazyVerificationTest.testLazyVerification(LazyVerificationTest.java:19)20 * Actually, there were zero interactions with this mock.21 */22public class LazyVerificationTest {23    @Rule24    public VerificationCollector verificationCollector = MockitoJUnit.collector();25    @Test26    public void testLazyVerification() throws Exception {27        List mockList = mock(ArrayList.class);28//        verify(mockList).add("one");29//        verify(mockList).clear();30    }31}

VerificationCollector

Using AI Code Generation

1import org.junit.Test;2import org.junit.runner.RunWith;3import org.mockito.Mock;4import org.mockito.junit.MockitoJUnitRunner;5import org.mockito.verification.VerificationCollector;6import java.util.List;7import static org.mockito.Mockito.times;8import static org.mockito.Mockito.verify;9@RunWith(MockitoJUnitRunner.class)10public class Test1 {11    List mockedList;12    public void test1() {13        mockedList.add("one");14        mockedList.add("two");15        VerificationCollector collector = MockitoJUnit.collector();16        verify(mockedList, times(1)).add("one");17        verify(mockedList, times(1)).add("two");18    }19}20-> at Test1.test1(Test1.java:17)

VerificationCollector

Using AI Code Generation

1import org.mockito.internal.verification.api.VerificationData;2import org.mockito.verification.VerificationMode;3import org.mockito.verification.VerificationSucceededEvent;4import org.mockito.verification.VerificationWithTimeout;5import org.mockito.verification.VerificationFailedEvent;6import org.mockito.verification.VerificationCollector;7import org.mockito.verification.VerificationDataImpl;8import org.mockito.internal.verification.api.VerificationDataInOrder;9import org.mockito.verification.VerificationDataInOrderImpl;10import org.mockito.internal.verification.api.VerificationDataAtLeast;11import org.mockito.verification.VerificationDataAtLeastImpl;12import org.mockito.internal.verification.api.VerificationDataAtMost;13import org.mockito.verification.VerificationDataAtMostImpl;14import org.mockito.internal.verification.api.VerificationDataAtLeastOnce;15import org.mockito.verification.VerificationDataAtLeastOnceImpl;16import org.mockito.internal.verification.api.VerificationDataWithTimeout;17import org.mockito.verification.VerificationDataWithTimeoutImpl;18import org.mockito.internal.verification.api.VerificationDataInOrderWithTimeout;19import org.mockito.verification.VerificationDataInOrderWithTimeoutImpl;20import org.mockito.internal.verification.api.VerificationDataAtLeastWithTimeout;21import org.mockito.verification.VerificationDataAtLeastWithTimeoutImpl;22import org.mockito.internal.verification.api.VerificationDataAtMostWithTimeout;23import org.mockito.verification.VerificationDataAtMostWithTimeoutImpl;24import org.mockito.internal.verification.api.VerificationDataAtLeastOnceWithTimeout;25import org.mockito.verification.VerificationDataAtLeastOnceWithTimeoutImpl;26import org.mockito.internal.verification.api.VerificationDataInOrderAtLeast;27import org.mockito.verification.VerificationDataInOrderAtLeastImpl;28import org.mockito.internal.verification.api.VerificationDataInOrderAtMost;29import org.mockito.verification.VerificationDataInOrderAtMostImpl;30import org.mockito.internal.verification.api.VerificationDataInOrderAtLeastOnce;31import org.mockito.verification.VerificationDataInOrderAtLeastOnceImpl;32import org.mockito.internal.verification.api.VerificationDataInOrderAtLeastWithTimeout;33import org.mockito.verification.VerificationDataInOrderAtLeastWithTimeoutImpl;34import org.mockito.internal.verification.api.VerificationDataInOrderAtMostWithTimeout;35import org.mockito.verification.VerificationDataInOrderAtMostWithTimeoutImpl;36import org.mockito.internal.verification.api.VerificationDataInOrderAtLeastOnceWithTimeout;37import org.mockito.verification.VerificationDataInOrder

VerificationCollector

Using AI Code Generation

1import org.mockito.junit.VerificationCollector;2import org.mockito.junit.MockitoJUnit;3import org.mockito.junit.MockitoRule;4import org.junit.Rule;5import org.junit.Test;6import org.junit.runner.RunWith;7import org.mockito.Mock;8import org.mockito.runners.MockitoJUnitRunner;9import static org.mockito.Mockito.*;10import static org.junit.Assert.*;11import java.util.*;12@RunWith(MockitoJUnitRunner.class)13public class 1 {14    List<String> mockedList;15    public MockitoRule mockitoRule = MockitoJUnit.rule();16    public void testVerificationCollector() {17        mockedList.add("one");18        mockedList.add("two");19        mockedList.add("two");20        mockedList.add("three");21        mockedList.add("three");22        mockedList.add("three");23        VerificationCollector collector = new VerificationCollector();24        verify(mockedList, times(1)).add("one");25        verify(mockedList, times(2)).add("two");26        verify(mockedList, times(3)).add("three");27        collector.verify(mockedList, times(1)).add("one");28        collector.verify(mockedList, times(2)).add("two");29        collector.verify(mockedList, times(3)).add("three");30        collector.assertCollected();31    }32}33-> at 1.testVerificationCollector(1.java:26)34-> at 1.testVerificationCollector(1.java:26)35-> at 1.testVerificationCollector(1.java:26)36Next Topic Mockito verifyNoMoreInteractions() method

VerificationCollector

Using AI Code Generation

1import static org.mockito.Mockito.mock;2import static org.mockito.Mockito.verify;3import static org.mockito.Mockito.when;4import org.junit.Test;5import org.mockito.Mock;6import org.mockito.Mockito;7import org.mockito.junit.MockitoJUnit;8import org.mockito.junit.VerificationCollector;9public class MockitoTest {10private List mockList;11public void testVerificationCollector() {12VerificationCollector collector = MockitoJUnit.collector();13verify(mockList).add("one");14verify(mockList).add("two");15collector.assertNoFailures();16}17}18-> at MockitoTest.testVerificationCollector(MockitoTest.java:15)19-> at MockitoTest.testVerificationCollector(MockitoTest.java:15)20	at org.mockito.internal.verification.NoInteractionsWanted.createException(NoInteractionsWanted.java:35)21	at org.mockito.internal.verification.NoInteractionsWanted.verify(NoInteractionsWanted.java:29)22	at org.mockito.internal.verification.api.VerificationCollectorImpl.verify(VerificationCollectorImpl.java:25)23	at org.mockito.junit.VerificationCollectorImpl.verify(VerificationCollectorImpl.java:22)24	at MockitoTest.testVerificationCollector(MockitoTest.java:15)25	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)26	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)27	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)28	at java.lang.reflect.Method.invoke(Method.java:498)29	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)30	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)31	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)32	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)33	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)34	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)35	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)

VerificationCollector

Using AI Code Generation

1import org.junit.Rule;2import org.junit.Test;3import org.mockito.junit.VerificationCollector;4public class MockitoTest {5    public VerificationCollector collector = new VerificationCollector();6    public void test() {7        List<String> list = mock(List.class);8        list.add("one");9        list.add("two");10        list.add("three");11        list.add("four");12        collector.checkThat(list).contains("one");13        collector.checkThat(list).contains("two");14        collector.checkThat(list).contains("three");15        collector.checkThat(list).contains("four");16    }17}18OK (1 test)19public static VerificationCollector collector = new VerificationCollector();20public static VerificationCollector collector = new VerificationCollector();21public void test() {22    List<String> list = mock(List.class);23    list.add("one");24    list.add("two");25    list.add("three");26    list.add("four");27    collector.checkThat(list).contains("one");28    collector.checkThat(list).contains("two");29    collector.checkThat(list).contains("three");30    collector.checkThat(list).contains("four");31}32public void test2() {33    List<String> list = mock(List.class);34    list.add("one");35    list.add("two");36    list.add("three");37    list.add("four");38    collector.checkThat(list).contains("one");39    collector.checkThat(list).contains("two");40    collector.checkThat(list).contains("three");41    collector.checkThat(list).contains("four");42}43OK (2 tests)

VerificationCollector

Using AI Code Generation

1import static org.mockito.Mockito.*;2import org.junit.Test;3import org.mockito.internal.verification.VerificationCollectorImpl;4import org.mockito.verification.VerificationCollector;5public class VerificationCollectorTest {6    public void testVerificationCollector() {7        VerificationCollector collector = new VerificationCollectorImpl();8        Foo foo = mock(Foo.class);9        foo.doSomething();10        foo.doSomething();11        foo.doSomething();12        collector.checkThat(foo).doSomething();13        collector.checkThat(foo).doSomething();14        collector.checkThat(foo).doSomething();15    }16    public static interface Foo {17        void doSomething();18    }19}20doSomething() should return Foo21    at org.mockito.internal.verification.api.VerificationDataImpl.wrongTypeOfReturnValue(VerificationDataImpl.java:72)22    at org.mockito.internal.verification.api.VerificationDataImpl.wrongTypeOfReturnValue(VerificationDataImpl.java:62)23    at org.mockito.internal.verification.api.VerificationDataImpl.wrongTypeOfReturnValue(VerificationDataImpl.java:58)24    at org.mockito.internal.verification.VerificationModeFactory$4.verify(VerificationModeFactory.java:85)25    at org.mockito.internal.verification.VerificationCollectorImpl.verify(VerificationCollectorImpl.java:42)26    at org.mockito.internal.verification.VerificationCollectorImpl.checkThat(VerificationCollectorImpl.java:36)27    at org.mockito.internal.verification.VerificationCollectorImpl.checkThat(VerificationCollectorImpl.java:31)28    at VerificationCollectorTest.testVerificationCollector(VerificationCollectorTest.java:18)29    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)30    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)31    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)32    at java.lang.reflect.Method.invoke(Method.java:597)33    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)34    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)35    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)36    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)37    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)

VerificationCollector

Using AI Code Generation

1import org.mockito.junit.VerificationCollector;2import org.mockito.junit.MockitoJUnit;3import org.mockito.junit.MockitoRule;4import org.mockito.Mock;5import org.mockito.MockitoAnnotations;6import org.junit.runner.RunWith;7import org.junit.runners.JUnit4;8import org.junit.Rule;9import org.junit.Test;10import org.junit.Before;11import static org.mockito.Mockito.*;12import static org.junit.Assert.*;13@RunWith(JUnit4.class)14public class 1 {15    public MockitoRule mockitoRule = MockitoJUnit.rule();16    private List mockedList;17    public void test1() {18        mockedList.add("one");19        mockedList.clear();20        VerificationCollector collector = mock(VerificationCollector.class);21        collector.collectVerification(mockedList.add("one"));22        collector.collectVerification(mockedList.clear());23    }24}25mockedList.add("one");261 * mockedList.add("one");27-> at 1.test1(1.java:23)28Explanation: The VerificationCollector is used to collect all the verifications. The VerificationCollector is a rule that can be used to collect all the verifications and then verify them after the test. The above code will fail because the mockedList.add("one") method is not called. We have to call the mockedList.add("one") method in order to

VerificationCollector

Using AI Code Generation

1import org.junit.Test;2import org.mockito.Mockito;3import org.mockito.junit.MockitoJUnit;4import org.mockito.junit.VerificationCollector;5public class MockitoJUnitRunnerTest {6    public void test() {7        VerificationCollector collector = MockitoJUnit.collector();8        collector.checkThat("a", Mockito.any(String.class));9        collector.checkThat("b", Mockito.any(String.class));10        collector.checkThat("c", Mockito.any(String.class));11    }12}13Following stubbings are unnecessary (click to navigate to relevant line of code):141. -> at MockitoJUnitRunnerTest.test(MockitoJUnitRunnerTest.java:14)152. -> at MockitoJUnitRunnerTest.test(MockitoJUnitRunnerTest.java:15)163. -> at MockitoJUnitRunnerTest.test(MockitoJUnitRunnerTest.java:16)

VerificationCollector

Using AI Code Generation

1import org.mockito.junit.VerificationCollector;2public class MockitoVerificationCollector {3public static void main(String[] args) {4VerificationCollector collector = new VerificationCollector();5List<String> mockList = mock(List.class);6mockList.add("one");7mockList.add("two");8mockList.add("three");9verify(mockList, times(1)).add("one");10verify(mockList, times(1)).add("two");11verify(mockList, times(1)).add("three");12collector.checkThat(mockList, times(1)).add("one");13collector.checkThat(mockList, times(1)).add("two");14collector.checkThat(mockList, times(1)).add("three");15collector.checkThat(mockList, times(1)).add("one");16collector.checkThat(mockList, times(1)).add("two");17collector.checkThat(mockList, times(1)).add("three");18collector.checkThat(mockList, times(1)).add("one");19collector.checkThat(mockList, times(1)).add("two");20collector.checkThat(mockList, times(1)).add("three");21collector.checkThat(mockList, times(1)).add("one");22collector.checkThat(mockList, times(1)).add("two");23collector.checkThat(mockList, times(1)).add("three");24collector.checkThat(mockList, times(1)).add("one");25collector.checkThat(mockList, times(1)).add("two");26collector.checkThat(mockList, times(1)).add("three");27collector.checkThat(mockList, times(1)).add("one");28collector.checkThat(mockList, times(1)).add("two");29collector.checkThat(mockList, times(1)).add("three");30collector.checkThat(mockList, times(1)).add("one");31collector.checkThat(mock

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