Add a mechanism to pause and resume geolocation requests.

content/public/test/android/javatests/src/org/chromium/content/browser/test/util/MockLocationProvider.java

+// Copyright 2013 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.content.browser.test.util;
+
+import android.os.Handler;
+import android.os.HandlerThread;
+import android.os.Message;
+
+import org.chromium.content.browser.LocationProviderAdapter;
+import org.chromium.content.browser.LocationProviderFactory;
+
+/**
+ * A mock location provider. When started, runs a background thread that periodically
+ * posts location updates. This does not involve any system Location APIs and thus
+ * does not require any special permissions in the test app or on the device.
+ */
+public class MockLocationProvider implements LocationProviderFactory.LocationProvider {
+    private boolean mIsRunning;
+    private Handler mHandler;
+    private HandlerThread mHandlerThread;
+    private static final Object mLock = new Object();
+
+    private static final int UPDATE_LOCATION_MSG = 100;
+
+    public MockLocationProvider() {
+    }
+
+    public void stopUpdates() {
+        if (mHandlerThread != null) {
+            mHandlerThread.quit();
+        }
+    }
+
+    @Override
+    public void start(boolean gpsEnabled) {
+        if (mIsRunning) return;
+
+        if (mHandlerThread == null) {
+            startMockLocationProviderThread();
+        }
+
+        mIsRunning = true;
+        synchronized (mLock) {
+            mHandler.sendEmptyMessage(UPDATE_LOCATION_MSG);
+        }
+    }
+
+    @Override
+    public void stop() {
+        if (!mIsRunning) return;
+        mIsRunning = false;
+        synchronized (mLock) {
+            mHandler.removeMessages(UPDATE_LOCATION_MSG);
+        }
+    }
+
+    @Override
+    public boolean isRunning() {
+        return mIsRunning;
+    }
+
+    private void startMockLocationProviderThread() {
+        assert mHandlerThread == null;
+        assert mHandler == null;
+
+        mHandlerThread = new HandlerThread("MockLocationProviderImpl");
+        mHandlerThread.start();
+        mHandler = new Handler(mHandlerThread.getLooper()) {
+            @Override
+            public void handleMessage(Message msg) {
+                synchronized (mLock) {
+                    if (msg.what == UPDATE_LOCATION_MSG) {
+                        newLocation();
+                        sendEmptyMessageDelayed(UPDATE_LOCATION_MSG, 250);
+                    }
+                }
+            }
+        };
+    }
+
+    private void newLocation() {
+        LocationProviderAdapter.newLocationAvailable(
+                0, 0, System.currentTimeMillis() / 1000.0,
+                false, 0,
+                true, 0.5,
+                false, 0,
+                false, 0);
+    }
+};
+