Execution failed for task ':app:compileDebugUnitTestJavaWithJavac'. (Solved)

Android Studio:

Error:Execution failed for task ':app:compileDebugUnitTestJavaWithJavac'.
> Compilation failed; see the compiler error output for details.

使用了LAMBDA后在Android Test里就会出现问题，把LAMBDA表达式切换成普通JAVA表达式就没问题了。