AndroidJUnitRunner_onStart.java

@Override
public void onStart() {
    setJsBridgeClassName("android.support.test.espresso.web.bridge.JavaScriptBridge");
    super.onStart();
    
    /*
     * The orchestrator cannot collect the list of tests as it is running in a different process
     * than the test app.  On first run, the Orchestrator will ask AJUR to list the tests
     * out that would be run for a given class parameter.  AJUR will then be successively
     * called with whatever it passes back to the orchestratorListener.
     */
    if (mRunnerArgs.listTestsForOrchestrator
       && isPrimaryInstrProcess(mRunnerArgs.targetProcess)) {
       Request testRequest = buildRequest(mRunnerArgs, getArguments());
       mOrchestratorListener.addTests(testRequest.getRunner().getDescription());
       finish(Activity.RESULT_OK, new Bundle());
       return;
    }
    ...
}