Attack flaky test

android/src/androidTest/java/org/ligi/passandroid/ThePastLocationsStore.java

@@ -1,9 +1,10 @@
 package org.ligi.passandroid;
 
 import android.app.Activity;
+import android.content.Context;
+import android.content.SharedPreferences;
 import android.test.suitebuilder.annotation.SmallTest;
 
-import org.junit.Before;
 import org.ligi.passandroid.model.PastLocationsStore;
 
 import javax.inject.Inject;
@@ -22,12 +23,22 @@ public class ThePastLocationsStore extends BaseIntegration<Activity> {
     @Override
     public void setUp() throws Exception {
         super.setUp();
-        ((TestComponent)App.component()).inject(this);
+        ((TestComponent) App.component()).inject(this);
+    }
+
+    @Override
+    protected void tearDown() throws Exception {
+        super.tearDown();
+        getSharedPrefs().edit().clear();
+    }
+
+    private SharedPreferences getSharedPrefs() {
+        return getInstrumentation().getContext().getSharedPreferences("" + (System.currentTimeMillis() / 100000), Context.MODE_PRIVATE);
     }
 
     @SmallTest
     public void testPastLocationsStoreShouldNeverContainMoreThanMaxElements() {
-        PastLocationsStore tested = new PastLocationsStore(getInstrumentation().getContext(), tracker);
+        PastLocationsStore tested = new PastLocationsStore(getSharedPrefs(), tracker);
 
         for (int i = 0; i < PastLocationsStore.MAX_ELEMENTS * 2; i++) {
             tested.putLocation("" + i);
@@ -39,13 +50,13 @@ public class ThePastLocationsStore extends BaseIntegration<Activity> {
 
     @SmallTest
     public void testPastLocationsStoreShouldStoreOnlyOneOfAKind() {
-        PastLocationsStore tested = new PastLocationsStore(getInstrumentation().getContext(), tracker);
+        PastLocationsStore tested = new PastLocationsStore(getSharedPrefs(), tracker);
 
         for (int i = 0; i < 3; i++) {
             tested.putLocation("foo");
         }
 
-        assertThat(tested.getLocations().size()).isLessThan(2);
+        assertThat(tested.getLocations()).containsOnly("foo");
 
     }
 

android/src/main/java/org/ligi/passandroid/AppModule.java

@@ -1,5 +1,8 @@
 package org.ligi.passandroid;
 
+import android.content.SharedPreferences;
+import android.preference.PreferenceManager;
+
 import com.squareup.otto.Bus;
 import com.squareup.otto.ThreadEnforcer;
 
@@ -33,6 +36,11 @@ public class AppModule {
         return new Settings(app);
     }
 
+    @Singleton
+    @Provides
+    SharedPreferences provideSharedPreferences() {
+        return PreferenceManager.getDefaultSharedPreferences(app);
+    }
 
     @Singleton
     @Provides

android/src/main/java/org/ligi/passandroid/model/PastLocationsStore.java

@@ -1,7 +1,6 @@
 package org.ligi.passandroid.model;
 
 import android.annotation.TargetApi;
-import android.content.Context;
 import android.content.SharedPreferences;
 import android.os.Build;
 import android.preference.PreferenceManager;
@@ -17,12 +16,12 @@ public class PastLocationsStore {
     public static final String KEY_PAST_LOCATIONS = "past_locations";
     public static final int MAX_ELEMENTS = 5;
 
-    private final Context context;
+    private final SharedPreferences sharedPreferences;
     private final Tracker tracker;
 
     @Inject
-    public PastLocationsStore(Context context, Tracker tracker) {
-        this.context = context;
+    public PastLocationsStore(SharedPreferences sharedPreferences, Tracker tracker) {
+        this.sharedPreferences = sharedPreferences;
         this.tracker = tracker;
     }
 
@@ -32,8 +31,7 @@ public class PastLocationsStore {
             // feature not available for these versions
             return;
         }
-        final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
-        final Set<String> pastLocations = prefs.getStringSet(KEY_PAST_LOCATIONS, new HashSet<String>());
+        final Set<String> pastLocations = sharedPreferences.getStringSet(KEY_PAST_LOCATIONS, new HashSet<String>());
 
         if (pastLocations.size() >= MAX_ELEMENTS) {
             deleteOneElementFromSet(pastLocations);
@@ -44,7 +42,7 @@ public class PastLocationsStore {
         }
 
         tracker.trackEvent("scan", "put location", "count", (long) pastLocations.size());
-        prefs.edit().putStringSet(KEY_PAST_LOCATIONS, pastLocations).apply();
+        sharedPreferences.edit().putStringSet(KEY_PAST_LOCATIONS, pastLocations).apply();
     }
 
     private void deleteOneElementFromSet(Set<String> pastLocations) {
@@ -65,7 +63,6 @@ public class PastLocationsStore {
             // feature not available for these versions
             return new HashSet<>();
         }
-        final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
-        return prefs.getStringSet(KEY_PAST_LOCATIONS, new HashSet<String>());
+        return sharedPreferences.getStringSet(KEY_PAST_LOCATIONS, new HashSet<String>());
     }
 }

android/src/main/java/org/ligi/passandroid/ui/SearchPassesIntentService.java

@@ -5,9 +5,11 @@ import android.app.NotificationManager;
 import android.app.PendingIntent;
 import android.content.Context;
 import android.content.Intent;
+import android.content.SharedPreferences;
 import android.graphics.Bitmap;
 import android.net.Uri;
 import android.os.Environment;
+import android.preference.PreferenceManager;
 import android.support.v4.app.NotificationCompat;
 
 import com.squareup.otto.Bus;
@@ -79,7 +81,8 @@ public class SearchPassesIntentService extends IntentService {
 
         findNotificationBuilder = new NotificationCompat.Builder(this).setAutoCancel(true).setSmallIcon(R.drawable.ic_launcher);
 
-        for (String path : new PastLocationsStore(getApplicationContext(), tracker).getLocations()) {
+        final SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
+        for (String path : new PastLocationsStore(preferences, tracker).getLocations()) {
             search_in(new File(path), false);
         }