title: test ending with error in my project
body: <p>My test Class:
      @RunWith(AndroidJUnit4.class)
      @LargeTest
      public class LoginActivityTest4  {</p>
  
  <pre><code>@Rule
  public ActivityTestRule&lt;LoginActivity&gt; mActivityRule =
          new ActivityTestRule(LoginActivity.class);
  @Test
  public void testContainsIntialViews() {
  
  
      onView(withId(R.id.Mot_de_passe)).check(matches(isDisplayed()));
      onView(withId(R.id.Identifiant)).check(matches(isDisplayed()));
      onView(withId(R.id.button_connexion)).check(matches(isClickable()));
  
   }
  }
  </code></pre>
  
  <p>my error </p>
  
  <pre><code>java.lang.ClassNotFoundException: 
  com.macuverie.mobile.vue.activity.LoginActivityTest4
  at java.lang.Class.classForName(Native Method)
  at java.lang.Class.forName(Class.java:400)
  at android.support.test.internal.runner.TestLoader.doCreateRunner(TestLoader.java:72)
  at android.support.test.internal.runner.TestLoader.getRunnersFor(TestLoader.java:104)
  at android.support.test.internal.runner.TestRequestBuilder.build(TestRequestBuilder.java:789)
   at android.support.test.runner.AndroidJUnitRunner.buildRequest(AndroidJUnitRunner.java:539)
   at android.support.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:382)
  at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1932)
  Caused by: java.lang.ClassNotFoundException: Didn't find class 
  "com.macuverie.mobile.vue.activity.LoginActivityTest4" on path: 
  DexPathList[[zip file "/system/framework/android.test.runner.jar", zip file 
  "/data/app/com.macuverie.mobile.test-2/base.apk", zip file 
  "/data/app/com.macuverie.mobile-1/base.apk"],nativeLibraryDirectories= 
  [/data/app/com.macuverie.mobile.test-2/lib/x86, 
  /data/app/com.macuverie.mobile-1/lib/x86, /system/lib, /vendor/lib]]
   at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:380)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
   ... 8 more
  
    Tests ran to completion.
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/PUBSV.png" rel="nofollow noreferrer">my package for test :</a></p>
  
  <p>It is the first time which I test under android so about one wants to explain me what I had of the evil or what I forgot please help me..</p>