Merge pull request #22 from ibalashov24/tests

Add a settings reset before running tests

Author: iakov

as/src/androidTest/java/com/trikset/gamepad/SettingsTests.java

@@ -29,6 +29,7 @@
 import static androidx.test.espresso.matcher.ViewMatchers.withContentDescription;
 import static androidx.test.espresso.matcher.ViewMatchers.withId;
 import static androidx.test.espresso.matcher.ViewMatchers.withText;
+import static androidx.test.platform.app.InstrumentationRegistry.getInstrumentation;
 import static org.hamcrest.Matchers.allOf;
 import static org.hamcrest.Matchers.is;
 import static org.junit.Assert.assertEquals;
@@ -38,7 +39,15 @@
 public class SettingsTests {
 
     @Rule
-    public ActivityTestRule<MainActivity> mActivityTestRule = new ActivityTestRule<>(MainActivity.class);
+    public ActivityTestRule<MainActivity> mActivityTestRule =
+            new ActivityTestRule<MainActivity>(MainActivity.class) {
+                @Override
+                protected void beforeActivityLaunched() {
+                    SharedPreferences preferences =
+                            PreferenceManager.getDefaultSharedPreferences(getInstrumentation().getTargetContext());
+                    preferences.edit().clear().commit();
+                }
+            };
 
     @Test
     public void settingsShouldWorkCorrectly() {