[Sync] PassphraseActivity: unregister for sync events when paused.

chrome/android/javatests/src/org/chromium/chrome/browser/sync/ui/PassphraseActivityTest.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/sync/ui/PassphraseActivityTest.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/sync/ui/PassphraseActivityTest.java b/chrome/android/javatests/src/org/chromium/chrome/browser/sync/ui/PassphraseActivityTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..8498da16f4e902f54904994c4357a4fce7b43e74
--- /dev/null
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/sync/ui/PassphraseActivityTest.java
@@ -0,0 +1,94 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser.sync.ui;
+
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.os.Bundle;
+import android.test.suitebuilder.annotation.SmallTest;
+
+import org.chromium.base.ThreadUtils;
+import org.chromium.base.test.util.Feature;
+import org.chromium.chrome.browser.sync.FakeProfileSyncService;
+import org.chromium.chrome.browser.sync.ProfileSyncService;
+import org.chromium.chrome.shell.ChromeShellTestBase;
+import org.chromium.sync.signin.ChromeSigninController;
+
+/**
+ * Tests for PassphraseActivity.
+ */
+public class PassphraseActivityTest extends ChromeShellTestBase {
+    private static final String TAG = "PassphraseActivityTest";
+    private static final String TEST_ACCOUNT = "test@gmail.com";
+
+    @Override
+    protected void setUp() throws Exception {
+        super.setUp();
+        clearAppData();
+        Context context = getInstrumentation().getTargetContext();
+        startChromeBrowserProcessSync(context);
+    }
+
+    @Override
+    protected void tearDown() throws Exception {
+        // Clear ProfileSyncService in case it was mocked.
+        ProfileSyncService.overrideForTests(null);
+        super.tearDown();
+    }
+
+    /**
+     * This is a regression test for http://crbug.com/469890.
+     */
+    @SmallTest
+    @Feature({"Sync"})
+    public void testCallbackAfterBackgrounded() throws Exception {
+        final Context context = getInstrumentation().getTargetContext();
+        // Override before creating the activity so we know initialized is false.
+        overrideProfileSyncService(context);
+        // PassphraseActivity won't start if an account isn't set.
+        ChromeSigninController.get(context).setSignedInAccountName(TEST_ACCOUNT);
+        // Create the activity.
+        final PassphraseActivity activity = launchPassphraseActivity(context);
+        assertNotNull(activity);
+        ThreadUtils.runOnUiThreadBlocking(new Runnable() {
+            @Override
+            public void run() {
+                // Fake backgrounding the activity.
+                Bundle bundle = new Bundle();
+                getInstrumentation().callActivityOnPause(activity);
+                getInstrumentation().callActivityOnSaveInstanceState(activity, bundle);
+                // Fake sync's backend finishing its initialization.
+                FakeProfileSyncService pss =
+                        (FakeProfileSyncService) ProfileSyncService.get(context);
+                pss.setSyncInitialized(true);
+                pss.syncStateChanged();
+            }
+        });
+        // Nothing crashed; success!
+    }
+
+    private PassphraseActivity launchPassphraseActivity(Context context) {
+        Intent intent = new Intent(Intent.ACTION_MAIN);
+        intent.setComponent(new ComponentName(context, PassphraseActivity.class));
+        intent.addCategory(Intent.CATEGORY_LAUNCHER);
+        // This activity will become the start of a new task on this history stack.
+        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        // Clears the task stack above this activity if it already exists.
+        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
+        return launchActivityWithIntent(
+                "org.chromium.chrome.shell", PassphraseActivity.class, intent);
+    }
+
+    private void overrideProfileSyncService(final Context context) {
+        ThreadUtils.runOnUiThreadBlocking(new Runnable() {
+            @Override
+            public void run() {
+                // PSS has to be constructed on the UI thread.
+                ProfileSyncService.overrideForTests(new FakeProfileSyncService(context));
+            }
+        });
+    }
+}