Maven 3 and JUnit 4 compilation problem package org junit does not exist

Question

I am trying to build a simple Java project with Maven  In my pom-file I declare JUnit 4 8 2 as the only dependency  Still Maven insists on using JUnit version 3 8 1  How do I fix it   The problem manifests itself in a compilation failure   package org junit does not exist   This is because of the import statement in my source code  The correct package name in JUnit 4   is org junit   while in version 3   it is junit framework    I think I have found documentation on the root of the problem on http   maven apache org plugins maven-surefire-plugin examples junit html but the advice there seems to be meant for Maven experts  I did not understand what to do

User · Answer

Me too had the same problem as shown below.

To resolve the issue, below lines are added to dependencies section in the app level build.gradle.

compile 'junit:junit:4.12'
androidTestCompile 'com.android.support.test:runner:0.5'

Gradle build then reported following warning.

Warning:Conflict with dependency 'com.android.support:support-annotations'. 
Resolved versions for app (25.1.0) and test app (23.1.1) differ. 
See http://g.co/androidstudio/app-test-app-conflict for details.

To solve this warning, following section is added to the app level build.gradle.

configurations.all {
    resolutionStrategy {
        force 'com.android.support:support-annotations:23.1.1'
    }
}

User · Answer

I had my files at the correct places  and just removing  lt scope gt test lt  scope gt  from the JUnit dependency entry solved the problem  I am using JUnit 4 12   I believe that with the test scope the dependency was just being ignored during the compilation phase  Now everything is working even when I call mvn test

User · Answer

My case was a simple oversight   I put the JUnit dependency declaration inside  lt dependencies gt  under the  lt dependencyManagement  gt  node instead of  lt project  gt  in the POM file  Correct way is    lt project gt   lt  -- Other elements -- gt       lt dependencies gt       lt  -- Other dependencies-- gt           lt dependency gt               lt groupId gt junit lt  groupId gt               lt artifactId gt junit lt  artifactId gt               lt version gt 4 11 lt  version gt           lt  dependency gt       lt  dependencies gt   lt project gt

User · Answer

I had a quite similar problem in a  test-utils  project  adding features  rules and assertions to JUnit  child of a parent project injecting dependencies  The class depending on the org junit rules package was in src main java   So I added a dependency on junit without test scope and it solved the problem    pom xml of the test-util project     lt dependency gt     lt groupId gt junit lt  groupId gt     lt artifactId gt junit lt  artifactId gt   lt  dependency gt    pom xml of the parent project     lt dependency gt     lt groupId gt junit lt  groupId gt     lt artifactId gt junit lt  artifactId gt     lt scope gt test lt  scope gt   lt  dependency gt

User · Answer

By default   maven looks at these folders for java and test classes respectively - src main java and src test java  When the src is specified with the test classes under source and the scope for junit dependency in pom xml is mentioned as test - org unit will not be found by maven

User · Answer

I had the same problem   All i did was -  From the pom xml file i deleted the dependency for junit 3 8 and added a new dependency for junit 4 8  Then i did  maven clean and maven install  It did the trick  To verify   after maven install i went project- properties-build path- maven dependencies and saw that now the junit 3 8 jar is gone    instead junit 4 8 jar is listed   cool    Now my test runs like a charm   Hope this helps somehow

User · Answer

How did you declare the version    lt version gt 4 8 2 lt  version gt    Be aware of the meaning from this declaration explained here  see NOTES    When declaring a  normal  version such as 3 8 2 for Junit  internally this is represented as  allow anything  but prefer 3 8 2   This means that when a conflict is detected  Maven is allowed to use the conflict algorithms to choose the best version  If you specify  3 8 2   it means that only 3 8 2 will be used and nothing else    To force using the version 4 8 2 try   lt version gt  4 8 2  lt  version gt    As you do not have any other dependencies in your project there shouldn t be any conflicts that cause your problem  The first declaration should work for you if you are able to get this version from a repository  Do you inherit dependencies from a parent pom

User · Answer

Find the one solution for this error if you have code in src main java Utils   lt dependency gt   lt groupId gt org assertj lt  groupId gt   lt artifactId gt assertj-core lt  artifactId gt   lt version gt 3 9 1 lt  version gt   lt  dependency gt

User · Answer

Changing the junit version fixed this for me  Seems like version 3 8 1 didn t work in my case  Issue fixed upon changing it to 4 12

User · Answer

Dennis Roberts  You were absolutely right  My test class was located in src main java  Also the value of the  scope  element in the POM for JUnit was  test   although that is how it is supposed to be  The problem was that I had been sloppy when creating the test class in Eclipse  resulting in it being created in src main java insted of src test java  This became easier to see in Eclipse s Project Explorer view after running  mvn eclipse eclipse   but your comment was what made me see it first  Thanks

User · Answer

my problem was a line inside my pom xml i had the line  lt sourceDirectory gt   basedir  src lt  sourceDirectory gt  removing this line made maven use regular structure folders which solves my issue

User · Answer

Just to have an answer with the complete solution to help the visitors   All you need to do is add the junit dependency to pom xml  Don t forget the  lt scope gt test lt  scope gt    lt dependency gt     lt groupId gt junit lt  groupId gt     lt artifactId gt junit lt  artifactId gt     lt version gt 4 11 lt  version gt     lt scope gt test lt  scope gt   lt  dependency gt

User · Answer

removing the scope tag in pom xml for junit worked

User · Answer

Add this dependency to your pom xml file   http   mvnrepository com artifact junit junit-dep 4 8 2   lt  -- https   mvnrepository com artifact junit junit-dep -- gt   lt dependency gt       lt groupId gt junit lt  groupId gt       lt artifactId gt junit-dep lt  artifactId gt       lt version gt 4 8 2 lt  version gt   lt  dependency gt

User · Answer

I had a similar problem of Eclipse compiling my code just fine but Maven failed when compiling the tests every time despite the fact JUnit was in my list of dependencies and the tests were in  src test java    In my case  I had the wrong version of JUnit in my list of dependencies   I wrote JUnit4 tests  with annotations  but had JUnit 3 8 x as my dependency   Between version 3 8 x and 4 of JUnit they changed the package name from junit framework to org junit which is why Maven still breaks compiling using a JUnit jar   I m still not entirely sure why Eclipse successfully compiled   It must have its own copy of JUnit4 somewhere in the classpath   Hope this alternative solution is useful to people   I reached this solution after following Arthur s link above

User · Answer

I also ran into this issue - I was trying to pull in an object from a source and it was working in the test code but not the src code  To further test  I copied a block of code from the test and dropped it into the src code  then immediately removed the JUnit lines so I just had how the test was pulling in the object  Then suddenly my code wouldn t compile   The issue was that when I dropped the code in  Eclipse helpfully resolved all the classes so I had JUnit calls coming from my src code  which was not proper  I should have noticed the warnings at the top about unused imports  but I neglected to see them   Once I removed the unused JUnit imports in my src file  it all worked beautifully

[maven] Maven 3 and JUnit 4 compilation problem: package org.junit does not exist

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