[WebAPK] Launch Play Store if the user does not have any web browsers installed

chrome/android/webapk/shell_apk/junit/src/org/chromium/webapk/shell_apk/MainActivityTest.java

Index: chrome/android/webapk/shell_apk/junit/src/org/chromium/webapk/shell_apk/MainActivityTest.java
diff --git a/chrome/android/webapk/shell_apk/junit/src/org/chromium/webapk/shell_apk/MainActivityTest.java b/chrome/android/webapk/shell_apk/junit/src/org/chromium/webapk/shell_apk/MainActivityTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..cb8e909111ea6e461fada019705b77249a425888
--- /dev/null
+++ b/chrome/android/webapk/shell_apk/junit/src/org/chromium/webapk/shell_apk/MainActivityTest.java
@@ -0,0 +1,122 @@
+// 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.webapk.shell_apk;
+
+import android.content.Intent;
+import android.content.pm.ActivityInfo;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageInfo;
+import android.content.pm.ResolveInfo;
+import android.os.Bundle;
+
+import org.chromium.testing.local.LocalRobolectricTestRunner;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.Robolectric;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.Shadows;
+import org.robolectric.annotation.Config;
+import org.robolectric.res.builder.RobolectricPackageManager;
+import org.robolectric.shadows.ShadowApplication;
+
+/**
+ * Tests MainActivity.
+ */
+@RunWith(LocalRobolectricTestRunner.class)
+@Config(manifest = Config.NONE)
+public class MainActivityTest {
+
+    private static final String PACKAGE_NAME = "package_name";
+    private static final String HOST_BROWSER_PACKAGE_NAME = "truly.random";
+
+    /**
+     * <meta-data> key in the Android Manifest for the host browser's package name.
+     */
+    private static final String META_RUNTIME_HOST = "org.chromium.webapk.shell_apk.runtimeHost";
+
+    /**
+     * <meta-data> key in Android Manifest for the start URL.
+     */
+    private static final String META_START_URL = "org.chromium.webapk.shell_apk.startUrl";
+
+    private ShadowApplication mShadowApplication;
+    private RobolectricPackageManager mPackageManager;
+
+    @Before
+    public void setUp() {
+        mShadowApplication = Shadows.shadowOf(RuntimeEnvironment.application);
+        mShadowApplication.setPackageName(PACKAGE_NAME);
+        mPackageManager =
+                (RobolectricPackageManager) RuntimeEnvironment.application.getPackageManager();
+    }
+
+    /**
+     * Tests that when the user launches the WebAPK and the user does not have any browser installed
+     * that the WebAPK launches Google Play to install the host browser.
+     */
+    @Test
+    public void testBrowserNotInstalled() {
+        // Throw ActivityNotFoundException if Intent cannot be resolved.
+        mShadowApplication.checkActivities(true);
+
+        // Set WebAPK's meta-data.
+        Bundle metaData = new Bundle();
+        metaData.putString(META_RUNTIME_HOST, HOST_BROWSER_PACKAGE_NAME);
+        metaData.putString(META_START_URL, "http://random.org");
+        mPackageManager.addPackage(newPackageInfo(PACKAGE_NAME, metaData));
+
+        // Make intents to Google Play not throw ActivityNotFoundException.
+        mPackageManager.addResolveInfoForIntent(
+                MainActivity.createInstallIntent(HOST_BROWSER_PACKAGE_NAME),
+                newResolveInfo("google.play"));
+
+        Robolectric.buildActivity(MainActivity.class).create();
+
+        Intent startActivityIntent = mShadowApplication.getNextStartedActivity();
+        Assert.assertNotNull(startActivityIntent);
+        Assert.assertTrue(startActivityIntent.getDataString().startsWith("market://"));
+    }
+
+    /**
+     * Test that when the user launches the WebAPK and the user has neither a browser nor Google
+     * Play installed that launching the WebAPK silently fails and does not crash.
+     */
+    @Test
+    public void testBrowserNotInstalledAndGooglePlayNotInstalled() {
+        // Throw ActivityNotFoundException if Intent cannot be resolved.
+        mShadowApplication.checkActivities(true);
+
+        // Set WebAPK's meta-data.
+        Bundle metaData = new Bundle();
+        metaData.putString(META_RUNTIME_HOST, HOST_BROWSER_PACKAGE_NAME);
+        metaData.putString(META_START_URL, "http://random.org");
+        mPackageManager.addPackage(newPackageInfo(PACKAGE_NAME, metaData));
+
+        Robolectric.buildActivity(MainActivity.class).create();
+
+        Intent startActivityIntent = mShadowApplication.getNextStartedActivity();
+        Assert.assertNull(startActivityIntent);
+    }
+
+    private static PackageInfo newPackageInfo(String packageName, Bundle metaData) {
+        ApplicationInfo applicationInfo = new ApplicationInfo();
+        applicationInfo.metaData = metaData;
+        PackageInfo packageInfo = new PackageInfo();
+        packageInfo.packageName = packageName;
+        packageInfo.applicationInfo = applicationInfo;
+        return packageInfo;
+    }
+
+    private static ResolveInfo newResolveInfo(String packageName) {
+        ActivityInfo activityInfo = new ActivityInfo();
+        activityInfo.packageName = packageName;
+        ResolveInfo resolveInfo = new ResolveInfo();
+        resolveInfo.activityInfo = activityInfo;
+        return resolveInfo;
+    }
+}