Class Not Found Exception When Running JUnit Tests from test jar

Question

I am building a project in a Windows Eclipse environment and then trying to test the project jar using the test jar in a Unix environment . When I run I get what is shown below. I am using Maven with the assembly plugin to package the project with the Test Jar and I can see the class that is supposedly missing inside the jar when I run the -tf command.

java -cp MyServerTest.jar:junit.jar junit.runner.JunitCore com.MyServer.services.ZoweAuthServiceTest

Results in:

java.lang.NoClassDefFoundError: com.MyServer.services.ZoweAuthService at com.MyServer.services.ZoweAuthServiceTest.testQueryToZowe(ZoweAuthServ iceTest.java:40) Caused by: java.lang.ClassNotFoundException: com.MyServer.services.ZoweAuthService

I would advice that you add some code into your question. It will increase the chances of getting an answer and reduce the chances of having your question flagged and removed. — acarlstein, Apr 30 '19 at 15:28
I guess you are running java command in a wrong place. you should put the ZoweAuthServiceTest class in the com/MyServer/services/ZoweAuthServiceTest.java path and run the command from the base folder — Mohsen, Apr 30 '19 at 15:35
Have you tried executing `mvn test` instead of manually calling the test from the command line? — The Head Rush, Apr 30 '19 at 17:22
I am using a special version of Unix that does not have mvn. — James Henderson, Apr 30 '19 at 17:35

score 0 · Answer 1 · answered Apr 30 '19 at 15:45

0

You could use the main answer from this post:

How to run JUnit test cases from the command line

Make sure to running from the current directory of your jar and adjust it accordingly to junit version.

answered Apr 30 '19 at 15:45

Juan Camilo Cortés

61
7

I am running it from the current directory of the jar. I have the junit jar in that directory as well. – James Henderson Apr 30 '19 at 17:24
Could you upload your code to github so I can check? – Juan Camilo Cortés Apr 30 '19 at 17:54
Sorry, I can't. – James Henderson Apr 30 '19 at 18:18
the class that is not being found has a BOOT-INF in the prefix before the class is specified in jar. When I run jar -tf on the jar. – James Henderson May 01 '19 at 14:24

score 0 · Answer 2 · answered May 01 '19 at 15:29

I figured it out. I guess I should have mentioned I am using spring-boot. Spring places the main classes of my project under a special prefix in the jar file "BOOT-INF" which prevents the test class from finding the class it wants to test. I added the classifer exec to my pom. This creates two separate jars. One for executing and one that has the normal class references for testing.

`<plugin>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-maven-plugin</artifactId>
    <configuration>
        <classifier>exec</classifier>
    </configuration>
</plugin>`

Class Not Found Exception When Running JUnit Tests from test jar

2 Answers2