diff -r 000000000000 -r 6474c204b198 mobile/android/tests/background/junit3/src/helpers/DBProviderTestCase.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mobile/android/tests/background/junit3/src/helpers/DBProviderTestCase.java	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,73 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+package org.mozilla.gecko.background.helpers;
+
+import java.io.File;
+
+import android.content.ContentProvider;
+import android.content.Context;
+import android.test.AndroidTestCase;
+import android.test.mock.MockContentResolver;
+
+/**
+ * Because ProviderTestCase2 is unable to handle custom DB paths.
+ */
+public abstract class DBProviderTestCase<T extends ContentProvider> extends
+    AndroidTestCase {
+
+  Class<T> providerClass;
+  String providerAuthority;
+
+  protected File fakeProfileDirectory;
+  private MockContentResolver resolver;
+  private T provider;
+
+  public DBProviderTestCase(Class<T> providerClass, String providerAuthority) {
+    this.providerClass = providerClass;
+    this.providerAuthority = providerAuthority;
+  }
+
+  public T getProvider() {
+    return provider;
+  }
+
+  public MockContentResolver getMockContentResolver() {
+    return resolver;
+  }
+
+  protected String getCacheSuffix() {
+    return this.getClass().getName() + "-" + System.currentTimeMillis();
+  }
+
+  @Override
+  protected void setUp() throws Exception {
+    super.setUp();
+
+    File cache = getContext().getCacheDir();
+    fakeProfileDirectory = new File(cache.getAbsolutePath() + getCacheSuffix());
+    System.out.println("Test: Creating profile directory " + fakeProfileDirectory.getAbsolutePath());
+    if (!fakeProfileDirectory.mkdir()) {
+      throw new IllegalStateException("Could not create temporary directory.");
+    }
+
+    final Context context = getContext();
+    assertNotNull(context);
+    resolver = new MockContentResolver();
+    provider = providerClass.newInstance();
+    provider.attachInfo(context, null);
+    assertNotNull(provider);
+    resolver.addProvider(providerAuthority, getProvider());
+  }
+
+  @Override
+  protected void tearDown() throws Exception {
+    // We don't check return values.
+    System.out.println("Test: Cleaning up " + fakeProfileDirectory.getAbsolutePath());
+    for (File child : fakeProfileDirectory.listFiles()) {
+      child.delete();
+    }
+    fakeProfileDirectory.delete();
+    super.tearDown();
+  }
+}