test for #6905

Signed-off-by: tobiasKaminsky <tobias@kaminsky.me>

src/androidTest/java/com/nextcloud/client/FileDisplayActivityIT.java

@@ -43,14 +43,12 @@
 import org.junit.Rule;
 import org.junit.Test;
 
-import androidx.test.espresso.Espresso;
 import androidx.test.espresso.contrib.DrawerActions;
 import androidx.test.espresso.contrib.NavigationViewActions;
 import androidx.test.espresso.intent.rule.IntentsTestRule;
 import androidx.test.rule.GrantPermissionRule;
 
 import static androidx.test.espresso.Espresso.onView;
-import static androidx.test.espresso.action.ViewActions.click;
 import static androidx.test.espresso.matcher.ViewMatchers.withId;
 import static androidx.test.platform.app.InstrumentationRegistry.getInstrumentation;
 import static junit.framework.TestCase.assertEquals;
@@ -175,4 +173,15 @@ public void openAccountSwitcher() {
 
         Espresso.onView(withId(R.id.switch_account_button)).perform(click());
     }
+
+    @Test
+    public void audioPlayerRemoveFile() {
+        FileDisplayActivity sut = activityRule.launchActivity(null);
+
+        sut.tryStopPlaying(new OCFile("/test.mp3"));
+
+        longSleep();
+
+        Assert.assertTrue(true); // if we reach this, everything is ok
+    }
 }

src/main/java/com/owncloud/android/ui/activity/FileDisplayActivity.java

@@ -131,6 +131,7 @@
 import javax.inject.Inject;
 
 import androidx.annotation.NonNull;
+import androidx.annotation.VisibleForTesting;
 import androidx.appcompat.app.AlertDialog;
 import androidx.appcompat.widget.SearchView;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
@@ -1782,9 +1783,10 @@ private void onRestoreFileVersionOperationFinish(RemoteOperationResult result) {
         }
     }
 
-    private void tryStopPlaying(OCFile file) {
+    @VisibleForTesting
+    public void tryStopPlaying(OCFile file) {
         // placeholder for stop-on-delete future code
-        if(mPlayerConnection != null) {
+        if (mPlayerConnection != null) {
             mPlayerConnection.stop(file);
         }
     }