[Android] Add Java observers to the NetworkChangeNotifier

net/android/javatests/src/org/chromium/net/NetworkChangeNotifierTest.java

Index: net/android/javatests/src/org/chromium/net/NetworkChangeNotifierTest.java
diff --git a/net/android/javatests/src/org/chromium/net/NetworkChangeNotifierTest.java b/net/android/javatests/src/org/chromium/net/NetworkChangeNotifierTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..8f1aff49ee507593612f84ca824ffc4157d46138
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+++ b/net/android/javatests/src/org/chromium/net/NetworkChangeNotifierTest.java
@@ -0,0 +1,116 @@
+// Copyright (c) 2012 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.net;
+
+import android.content.Context;
+import android.content.Intent;
+import android.net.ConnectivityManager;
+import android.telephony.TelephonyManager;
+import android.test.InstrumentationTestCase;
+import android.test.UiThreadTest;
+import android.test.suitebuilder.annotation.MediumTest;
+
+import org.chromium.base.test.Feature;
+
+public class NetworkChangeNotifierTest extends InstrumentationTestCase {
+    /**
+     * Listens for alerts fired by the NetworkChangeNotifier when network status changes.
+     */
+    private static class NetworkChangeNotifierTestObserver
+            implements NetworkChangeNotifier.ConnectionTypeObserver {
+        private boolean mReceivedNotification = false;
+
+        public void onConnectionTypeChanged(int connectionType) {
+            mReceivedNotification = true;
+        }
+
+        public boolean hasReceivedNotification() {
+            return mReceivedNotification;
+        }
+    }
+
+    /**
+     * Mocks out calls to the ConnectivityManager.
+     */
+    class MockConnectivityManagerDelegate
+            extends NetworkChangeNotifierAutoDetect.ConnectivityManagerDelegate {
+        private boolean mActiveNetworkExists;
+        private int mNetworkType;
+        private int mNetworkSubtype;
+
+        MockConnectivityManagerDelegate() {
+            super(null);
+        }
+
+        @Override
+        boolean activeNetworkExists() {
+            return mActiveNetworkExists;
+        }
+
+        void setActiveNetworkExists(boolean networkExists) {
+            mActiveNetworkExists = networkExists;
+        }
+
+        @Override
+        int getNetworkType() {
+            return mNetworkType;
+        }
+
+        void setNetworkType(int networkType) {
+            mNetworkType = networkType;
+        }
+
+        @Override
+        int getNetworkSubtype() {
+            return mNetworkSubtype;
+        }
+
+        void setNetworkSubtype(int networkSubtype) {
+            mNetworkSubtype = networkSubtype;
+        }
+    }
+
+    /**
+     * Tests that when Chrome gets an intent indicating a change in network connectivity, it sends a
+     * notification to Java observers.
+     */
+    @UiThreadTest
+    @MediumTest
+    @Feature({"Android-AppBase"})
+    public void testNetworkChangeNotifierJavaObservers() throws InterruptedException {
+        // Create a new notifier that doesn't have a native-side counterpart.
+        Context context = getInstrumentation().getTargetContext();
+        NetworkChangeNotifier.createInstance(context, 0);
+
+        NetworkChangeNotifier.setAutoDetectConnectivityState(true);
+        NetworkChangeNotifierAutoDetect receiver = NetworkChangeNotifier.getAutoDetectorForTest();
+        assertTrue(receiver != null);
+
+        MockConnectivityManagerDelegate connectivityDelegate =
+                new MockConnectivityManagerDelegate();
+        connectivityDelegate.setActiveNetworkExists(true);
+        connectivityDelegate.setNetworkType(NetworkChangeNotifier.CONNECTION_UNKNOWN);
+        connectivityDelegate.setNetworkSubtype(TelephonyManager.NETWORK_TYPE_UNKNOWN);
+        receiver.setConnectivityManagerDelegateForTests(connectivityDelegate);
+
+        // Initialize the NetworkChangeNotifier with a connection.
+        Intent connectivityIntent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION);
+        receiver.onReceive(getInstrumentation().getTargetContext(), connectivityIntent);
+
+        // We shouldn't be re-notified if the connection hasn't actually changed.
+        NetworkChangeNotifierTestObserver observer = new NetworkChangeNotifierTestObserver();
+        NetworkChangeNotifier.addConnectionTypeObserver(observer);
+        receiver.onReceive(getInstrumentation().getTargetContext(), connectivityIntent);
+        assertFalse(observer.hasReceivedNotification());
+
+        // Mimic that connectivity has been lost and ensure that Chrome notifies our observer.
+        connectivityDelegate.setActiveNetworkExists(false);
+        connectivityDelegate.setNetworkType(NetworkChangeNotifier.CONNECTION_NONE);
+        Intent noConnectivityIntent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION);
+        noConnectivityIntent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true);
+        receiver.onReceive(getInstrumentation().getTargetContext(), noConnectivityIntent);
+        assertTrue(observer.hasReceivedNotification());
+    }
+}