java.lang.NoClassDefFoundError while running JUnit test in Netbeans

Question

I am building an Android hello world application in Netbeans. It's building properly and I am able to run in the emulator also.

But when creating and running the Junit test I get a java.lang.NoClassDefFoundError.

How can I fix this problem?

Answer 1

The full error message contains the name of the class, that wasn't found on the classpath. Double check if the classpath that is used for running the test includes all required classes and libraries (your class files, junit.jar, android specific libaries).

Answer 2

I find that a rebuild usually finds the classes (as it is a classpath issue). Netbeans seems to aggressively compile existing tests, but the main source code (from a maven setting at least) is not always available.

I've started running full builds to try address this. There might be a plugin that addresses this but I haven't found it yet.

EDIT: This might help.