Blimp settings UI integration for Chrome, everything still lives in Blimp.

blimp/client/app/android/javatests/src/org/chromium/blimp/core/settings/BlimpPreferencesTest.java

Index: blimp/client/app/android/javatests/src/org/chromium/blimp/core/settings/BlimpPreferencesTest.java
diff --git a/blimp/client/app/android/javatests/src/org/chromium/blimp/core/settings/BlimpPreferencesTest.java b/blimp/client/app/android/javatests/src/org/chromium/blimp/core/settings/BlimpPreferencesTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..0d53f4e6b222013355d735ab3c83f331586e4c73
--- /dev/null
+++ b/blimp/client/app/android/javatests/src/org/chromium/blimp/core/settings/BlimpPreferencesTest.java
@@ -0,0 +1,103 @@
+// Copyright 2016 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.blimp.core.settings;
+
+import android.app.FragmentManager;
+import android.content.Intent;
+import android.preference.Preference;
+import android.preference.PreferenceFragment;
+import android.preference.PreferenceScreen;
+import android.test.suitebuilder.annotation.SmallTest;
+
+import org.chromium.base.ThreadUtils;
+import org.chromium.base.test.BaseActivityInstrumentationTestCase;
+import org.chromium.blimp_public.BlimpSettingsCallbacks;
+
+/**
+ * Test blimp setting page.
+ */
+public class BlimpPreferencesTest extends BaseActivityInstrumentationTestCase<MockPreferences> {
+
+    public BlimpPreferencesTest() {
+        super(MockPreferences.class);
+    }
+
+    // Launch the testing activity from non UI thread.
+    private void launchActivity() {
+        assertFalse(ThreadUtils.runningOnUiThread());
+        Intent intent = new Intent(Intent.ACTION_MAIN);
+        setActivityIntent(intent);
+
+        // Start the activity.
+        getActivity();
+    }
+
+    // Mock callback implementation.
+    static class MockSettingCallback implements BlimpSettingsCallbacks {
+        private int mRestartCalled = 0;
+        @Override
+        public void onRestartBrowserRequested() {
+            ++mRestartCalled;
+        }
+    }
+
+    // Mock {@link AboutBlimpPreferences}, the main test target class.
+    static class MockAboutBlimpPreferences extends AboutBlimpPreferences {
+        private static final String BLIMP_PREF_TAG = "TestBlimpPref";
+        public void testRestartBrowser() {
+            super.restartBrowser();
+        }
+    }
+
+    private Preference attachBlimpPref(PreferenceFragment fragment,
+            BlimpSettingsCallbacks callback) {
+        ThreadUtils.assertOnUiThread();
+        assertNotNull(fragment);
+        MockAboutBlimpPreferences.addBlimpPreferences(fragment);
+        MockAboutBlimpPreferences.registerCallback(callback);
+        return fragment.findPreference(MockAboutBlimpPreferences.PREF_BLIMP_SWITCH);
+    }
+
+    /**
+     * Test if blimp settings can be attached correctly, and if callback is handled correctly.
+     */
+    @SmallTest
+    public void testBlimpPref() {
+        launchActivity();
+
+        ThreadUtils.runOnUiThreadBlocking(new Runnable() {
+            @Override
+            public void run() {
+                PreferenceFragment mainFragment = getActivity().getMainFragment();
+                assertNotNull("Mock Main preferences is null.", mainFragment);
+
+                PreferenceScreen mainScreen = mainFragment.getPreferenceScreen();
+                assertNotNull("Mock Main preferences screen is null.", mainScreen);
+
+                MockSettingCallback callback = new MockSettingCallback();
+
+                // Check if blimp settings preference item can be attached to main preferences list.
+                Preference blimpPref = attachBlimpPref(mainFragment, callback);
+                assertNotNull("Blimp preference item in main preferences list is not found.",
+                        blimpPref);
+
+                // Open blimp settings page and check if callback is handled.
+                FragmentManager manager = mainFragment.getFragmentManager();
+                manager.beginTransaction().add(
+                        new MockAboutBlimpPreferences(), MockAboutBlimpPreferences.BLIMP_PREF_TAG)
+                            .commitAllowingStateLoss();
+                manager.executePendingTransactions();
+
+                MockAboutBlimpPreferences blimpFragment = (MockAboutBlimpPreferences)
+                        manager.findFragmentByTag(MockAboutBlimpPreferences.BLIMP_PREF_TAG);
+                assertNotNull("Blimp PreferenceFragment is not found.", blimpFragment);
+
+                blimpFragment.testRestartBrowser();
+                assertEquals("Unexpected number of callback triggered.", 1,
+                        callback.mRestartCalled);
+            }
+        });
+    }
+}