[AndroidWebView] Add instrumentation test to catch StrictMode violations

android_webview/javatests/src/org/chromium/android_webview/test/AwStrictModeTest.java

Index: android_webview/javatests/src/org/chromium/android_webview/test/AwStrictModeTest.java
diff --git a/android_webview/javatests/src/org/chromium/android_webview/test/AwStrictModeTest.java b/android_webview/javatests/src/org/chromium/android_webview/test/AwStrictModeTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..9a0dbe2f2f98a5bd97e0291c4d38ae6f8639871d
--- /dev/null
+++ b/android_webview/javatests/src/org/chromium/android_webview/test/AwStrictModeTest.java
@@ -0,0 +1,111 @@
+// 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.android_webview.test;
+
+import android.os.StrictMode;
+import android.test.suitebuilder.annotation.LargeTest;
+
+import org.chromium.android_webview.AwBrowserProcess;
+import org.chromium.base.test.util.Feature;
+
+/**
+ * Tests ensuring that starting up WebView does not cause any diskRead StrictMode violations.
+ */
+public class AwStrictModeTest extends AwTestBase {
+    private TestAwContentsClient mContentsClient;
+    private AwTestContainerView mAwTestContainerView;
+
+    private StrictMode.ThreadPolicy mOldThreadPolicy;
+    private StrictMode.VmPolicy mOldVmPolicy;
+
+    @Override
+    protected void setUp() throws Exception {
+        super.setUp();
+        mContentsClient = new TestAwContentsClient();
+        enableStrictModeOnUiThreadSync();
+    }
+
+    @Override
+    protected void tearDown() throws Exception {
+        disableStrictModeOnUiThreadSync();
+        super.tearDown();
+    }
+
+    @Override
+    protected boolean needsAwBrowserContextCreated() {
+        return false;
+    }
+
+
+    @Override
+    protected boolean needsBrowserProcessStarted() {
+        // Don't start the browser process in AwTestBase - we want to start it ourselves with
+        // strictmode policies turned on.
+        return false;
+    }
+
+    @LargeTest
+    @Feature({"AndroidWebView"})
+    public void testStartup() throws Exception {
+        startEverythingSync();
+    }
+
+    @LargeTest
+    @Feature({"AndroidWebView"})
+    public void testLoadEmptyData() throws Exception {
+        startEverythingSync();
+        loadDataSync(mAwTestContainerView.getAwContents(),
+                mContentsClient.getOnPageFinishedHelper(), "", "text/html", false);
+    }
+
+    @LargeTest
+    @Feature({"AndroidWebView"})
+    public void testSetJavaScriptAndLoadData() throws Exception {
+        startEverythingSync();
+        enableJavaScriptOnUiThread(mAwTestContainerView.getAwContents());
+        loadDataSync(mAwTestContainerView.getAwContents(),
+                mContentsClient.getOnPageFinishedHelper(), "", "text/html", false);
+    }
+
+    private void enableStrictModeOnUiThreadSync() {
+        getInstrumentation().runOnMainSync(new Runnable() {
+            @Override
+            public void run() {
+                mOldThreadPolicy = StrictMode.getThreadPolicy();
+                mOldVmPolicy = StrictMode.getVmPolicy();
+                StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()
+                        .detectAll()
+                        .penaltyLog()
+                        .penaltyDeath()
+                        .build());
+                StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()
+                        .detectAll()
+                        .penaltyLog()
+                        .penaltyDeath()
+                        .build());
+            }});
+    }
+
+    private void disableStrictModeOnUiThreadSync() {
+        getInstrumentation().runOnMainSync(new Runnable() {
+            @Override
+            public void run() {
+                StrictMode.setThreadPolicy(mOldThreadPolicy);
+                StrictMode.setVmPolicy(mOldVmPolicy);
+            }});
+    }
+
+    private void startEverythingSync() throws Exception {
+        getActivity();
+        getInstrumentation().runOnMainSync(new Runnable() {
+            @Override
+            public void run() {
+                createAwBrowserContext();
+                AwBrowserProcess.start();
+                mAwTestContainerView = createAwTestContainerView(mContentsClient);
+            }
+        });
+    }
+}