[Junit 5 ] Failed to release mocks error | Community
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N
newbie34
April 10, 2025

[Junit 5 ] Failed to release mocks error

  • April 10, 2025
  • 2 replies
  • 1140 views

Hi guys ,

While building code with Oracle jdk-21.0.5 , I am getting below error for test class :-

This should not happen unless you are using a third-party mock maker [ERROR] <MockitoAnnotations.initMocks(this);> Mockito Failed to release mocks

 

Dependencies used :-

 

<dependency> <groupId>org.junit</groupId> <artifactId>junit-bom</artifactId> <version>5.11.4</version> <type>pom</type> <scope>import</scope> </dependency> <dependency> <groupId>org.junit.jupiter</groupId> <artifactId>junit-jupiter</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.mockito</groupId> <artifactId>mockito-core</artifactId> <version>5.16.0</version> <scope>test</scope> </dependency> <dependency> <groupId>org.mockito</groupId> <artifactId>mockito-junit-jupiter</artifactId> <version>5.16.0</version> <scope>test</scope> </dependency> <dependency> <groupId>org.mockito</groupId> <artifactId>mockito-inline</artifactId> <version>5.2.0</version> <scope>test</scope> </dependency> <dependency> <groupId>junit-addons</groupId> <artifactId>junit-addons</artifactId> <version>1.4</version> <scope>test</scope> </dependency> <dependency> <groupId>io.wcm</groupId> <artifactId>io.wcm.testing.aem-mock.junit5</artifactId> <version>5.1.2</version> <scope>test</scope> </dependency> <dependency> <groupId>org.apache.sling</groupId> <artifactId>org.apache.sling.testing.caconfig-mock-plugin</artifactId> <version>1.4.0</version> </dependency> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-surefire-plugin</artifactId> <version>3.5.2</version> <configuration> <useSystemClassLoader>false</useSystemClassLoader> </configuration> </plugin>

 

If anyone can help with the solution .

2 replies

MukeshYadav_
Community Advisor
MukeshYadav_Community Advisor
Community Advisor
April 11, 2025

Hi, 

You may try Try adding @ExtendWith(MockitoExtension.class) on top of the test class and removing MockitoAnnotations.initMocks(this); from setUp method

Since you're using JUnit 5, you should prefer:

@ExtendWith(MockitoExtension.class) class MyTest { @Mock MyService service; }

instead of:

@BeforeEach void setUp() { MockitoAnnotations.initMocks(this); // OLD STYLE }

OR try upgrading  version of mockito-inline

Thanks

    N
    newbie34Author
    April 21, 2025

    Hi @mukeshyadav_ ,thank you  for replying ,

    After using @ExtendWith(MockitoExtension.class) , 

    getting below error for globally mocked  variables (eg -

     
    @Mock ValueMap valMap;

    ) -- 

     

    Mockito couldn't inject mock dependency on field 'org.apache.sling.api.resource.ValueMap com.adobe.cq.sightly.WCMUsePojo.inheritedPageProperties' that is annotated with @InjectMocks in your test, because there were multiple matching mocks (i.e. fields annotated with @Mock and having matching type) If you have multiple fields of same type in your class under test then consider naming the @Mock fields identically to the respective class under test's fields, so Mockito can match them by name.

     

    If I mock same variables locally  ( eg:- ValueMap valMap = Mockito.mock(ValueMap.class); )-

    then null is assigned to them .

     

    I am using mockito-inline v5.2.0 , which is the latest .

    Please let me know how can I solve this issue .

     

    kautuk_sahni
    Community Manager
    kautuk_sahniCommunity Manager
    Community Manager
    July 9, 2025

    @newbie34 Just checking in — were you able to resolve your issue?
    We’d love to hear how things worked out. If the suggestions above helped, marking a response as correct can guide others with similar questions. And if you found another solution, feel free to share it — your insights could really benefit the community. Thanks again for being part of the conversation!

    Kautuk Sahni
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