Add support for webapk without runtimeHost

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

Index: chrome/android/webapk/shell_apk/junit/src/org/chromium/webapk/shell_apk/WebApkUtilsTest.java
diff --git a/chrome/android/webapk/shell_apk/junit/src/org/chromium/webapk/shell_apk/WebApkUtilsTest.java b/chrome/android/webapk/shell_apk/junit/src/org/chromium/webapk/shell_apk/WebApkUtilsTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..f33a9c83235b54cce9764ae49440f6d20f6734d4
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+++ b/chrome/android/webapk/shell_apk/junit/src/org/chromium/webapk/shell_apk/WebApkUtilsTest.java
@@ -0,0 +1,214 @@
+// Copyright 2017 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 static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyInt;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.content.pm.ActivityInfo;
+import android.content.pm.ResolveInfo;
+import android.os.Bundle;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mockito;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.Config;
+import org.robolectric.res.builder.RobolectricPackageManager;
+
+import org.chromium.testing.local.LocalRobolectricTestRunner;
+import org.chromium.webapk.lib.common.WebApkConstants;
+import org.chromium.webapk.lib.common.WebApkMetaDataKeys;
+import org.chromium.webapk.test.WebApkTestHelper;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+/** Tests for WebApkUtils. */
+@RunWith(LocalRobolectricTestRunner.class)
+@Config(manifest = Config.NONE, packageName = WebApkUtilsTest.WEBAPK_PACKAGE_NAME)
+public class WebApkUtilsTest {
+    protected static final String WEBAPK_PACKAGE_NAME = "org.chromium.webapk.test_package";
+    private static final String BROWSER_INSTALLED_SUPPORTING_WEBAPKS = "com.chrome.canary";
+    private static final String BROWSER_UNINSTALLED_SUPPORTING_WEBAPKS = "com.chrome.dev";
+    private static final String BROWSER_INSTALLED_NOT_SUPPORTING_WEBAPKS =
+            "browser.installed.not.supporting.webapks";
+    private static final String ANOTHER_BROWSER_INSTALLED_SUPPORTING_WEBAPKS = "com.chrome.beta";
+
+    private static final List<String> sInstalledBrowsers = new ArrayList<String>(Arrays.asList(
+            BROWSER_INSTALLED_NOT_SUPPORTING_WEBAPKS, BROWSER_INSTALLED_SUPPORTING_WEBAPKS,
+            ANOTHER_BROWSER_INSTALLED_SUPPORTING_WEBAPKS));
+
+    private Context mContext;
+    private RobolectricPackageManager mPackageManager;
+
+    @Before
+    public void setUp() {
+        mContext = RuntimeEnvironment.application;
+        mPackageManager =
+                Mockito.spy((RobolectricPackageManager) RuntimeEnvironment.getPackageManager());
+        RuntimeEnvironment.setRobolectricPackageManager(mPackageManager);
+
+        WebApkUtils.resetCachedHostPackageForTesting();
+    }
+
+    /**
+     * Tests that null will be returned if there isn't any browser installed on the device.
+     */
+    @Test
+    public void testReturnsNullWhenNoBrowserInstalled() {
+        String hostBrowser = WebApkUtils.getHostBrowserPackageName(mContext);
+        Assert.assertNull(hostBrowser);
+    }
+
+    /**
+     * Tests that the package name of the host browser in the SharedPreference will be returned if
+     * it is installed, even if a host browser is specified in the AndroidManifest.xml.
+     */
+    @Test
+    public void testReturnsHostBrowserInSharedPreferenceIfInstalled() {
+        String expectedHostBrowser = BROWSER_INSTALLED_SUPPORTING_WEBAPKS;
+        mockInstallBrowsers(ANOTHER_BROWSER_INSTALLED_SUPPORTING_WEBAPKS);
+        setHostBrowserInMetadata(ANOTHER_BROWSER_INSTALLED_SUPPORTING_WEBAPKS);
+        setHostBrowserInSharedPreferences(expectedHostBrowser);
+
+        String hostBrowser = WebApkUtils.getHostBrowserPackageName(mContext);
+        Assert.assertEquals(hostBrowser, expectedHostBrowser);
+    }
+
+    /**
+     * This is a test for the WebAPK WITH a runtime host specified in its AndroidManifest.xml.
+     * Tests that the package name of the host browser specified in the AndroidManifest.xml will be
+     * returned if:
+     * 1. there isn't a host browser specified in the SharedPreference or the specified one is
+     *    uninstalled.
+     * And
+     * 2. the host browser stored in the AndroidManifest is still installed.
+     */
+    @Test
+    public void testReturnsHostBrowserInManifestIfInstalled() {
+        String expectedHostBrowser = BROWSER_INSTALLED_SUPPORTING_WEBAPKS;
+        mockInstallBrowsers(ANOTHER_BROWSER_INSTALLED_SUPPORTING_WEBAPKS);
+        setHostBrowserInMetadata(expectedHostBrowser);
+        // Simulates there isn't any host browser stored in the SharedPreference.
+        setHostBrowserInSharedPreferences(null);
+
+        String hostBrowser = WebApkUtils.getHostBrowserPackageName(mContext);
+        Assert.assertEquals(hostBrowser, expectedHostBrowser);
+
+        WebApkUtils.resetCachedHostPackageForTesting();
+        // Simulates there is a host browser stored in the SharedPreference but uninstalled.
+        setHostBrowserInSharedPreferences(BROWSER_UNINSTALLED_SUPPORTING_WEBAPKS);
+        hostBrowser = WebApkUtils.getHostBrowserPackageName(mContext);
+        Assert.assertEquals(hostBrowser, expectedHostBrowser);
+    }
+
+    /**
+     * This is a test for the WebAPK WITH a runtime host specified in its AndroidManifest.xml.
+     * Tests that null will be returned if:
+     * 1) there isn't a host browser stored in the SharedPreference or it isn't installed.
+     * And
+     * 2) the host browser specified in the AndroidManifest.xml isn't installed;
+     * In this test, we only simulate the the first part of the condition 1.
+     */
+    @Test
+    public void testReturnsNullIfHostBrowserSpecifiedInManifestIsUninstalled() {
+        mockInstallBrowsers(BROWSER_INSTALLED_SUPPORTING_WEBAPKS);
+        setHostBrowserInMetadata(BROWSER_UNINSTALLED_SUPPORTING_WEBAPKS);
+        // Simulates that there isn't any host browser stored in the SharedPreference.
+        setHostBrowserInSharedPreferences(null);
+
+        String hostBrowser = WebApkUtils.getHostBrowserPackageName(mContext);
+        Assert.assertNull(hostBrowser);
+    }
+
+    /**
+     * This is a test for the WebAPK WITHOUT any runtime host specified in its AndroidManifest.xml.
+     * Tests that the default browser package name will be returned if:
+     * 1. there isn't any host browser stored in the SharedPreference, or the specified one has
+     *    been uninstalled.
+     * And
+     * 2. the default browser supports WebAPKs.
+     * In this test, we only simulate the the first part of the condition 1.
+     */
+    @Test
+    public void testReturnsDefaultBrowser() {
+        String defaultBrowser = BROWSER_INSTALLED_SUPPORTING_WEBAPKS;
+        mockInstallBrowsers(defaultBrowser);
+        setHostBrowserInMetadata(null);
+        // Simulates that there isn't any host browser stored in the SharedPreference.
+        setHostBrowserInSharedPreferences(null);
+
+        String hostBrowser = WebApkUtils.getHostBrowserPackageName(mContext);
+        Assert.assertEquals(hostBrowser, defaultBrowser);
+    }
+
+    /**
+     * This is a test for the WebAPK WITHOUT any runtime host specified in its AndroidManifest.xml.
+     * Tests that null will be returned if:
+     * 1. there isn't any host browser stored in the SharedPreference, or the specified one has
+     *    been uninstalled.
+     * And
+     * 2. the default browser doesn't support WebAPKs.
+     * In this test, we only simulate the the first part of the condition 1.
+     */
+    @Test
+    public void testReturnsNullWhenDefaultBrowserDoesNotSupportWebApks() {
+        mockInstallBrowsers(BROWSER_INSTALLED_NOT_SUPPORTING_WEBAPKS);
+        setHostBrowserInMetadata(null);
+        setHostBrowserInSharedPreferences(null);
+
+        String hostBrowser = WebApkUtils.getHostBrowserPackageName(mContext);
+        Assert.assertNull(hostBrowser);
+    }
+
+    private static ResolveInfo newResolveInfo(String packageName) {
+        ActivityInfo activityInfo = new ActivityInfo();
+        activityInfo.packageName = packageName;
+        ResolveInfo resolveInfo = new ResolveInfo();
+        resolveInfo.activityInfo = activityInfo;
+        return resolveInfo;
+    }
+
+    private void mockInstallBrowsers(String defaultBrowser) {
+        Intent intent = null;
+        try {
+            intent = Intent.parseUri("http://", Intent.URI_INTENT_SCHEME);
+        } catch (Exception e) {
+            Assert.fail();
+            return;
+        }
+
+        for (String name : sInstalledBrowsers) {
+            mPackageManager.addResolveInfoForIntent(intent, newResolveInfo(name));
+        }
+
+        ResolveInfo defaultBrowserInfo = newResolveInfo(defaultBrowser);
+        mPackageManager.addResolveInfoForIntent(intent, defaultBrowserInfo);
+
+        Mockito.when(mPackageManager.resolveActivity(any(Intent.class), anyInt()))
+                .thenReturn(defaultBrowserInfo);
+    }
+
+    private void setHostBrowserInSharedPreferences(String hostBrowserPackage) {
+        SharedPreferences sharedPref =
+                mContext.getSharedPreferences(WebApkConstants.PREF_PACKAGE, Context.MODE_PRIVATE);
+        SharedPreferences.Editor editor = sharedPref.edit();
+        editor.putString(WebApkUtils.SHARED_PREF_RUNTIME_HOST, hostBrowserPackage);
+        editor.apply();
+    }
+
+    private void setHostBrowserInMetadata(String hostBrowserPackage) {
+        Bundle bundle = new Bundle();
+        bundle.putString(WebApkMetaDataKeys.RUNTIME_HOST, hostBrowserPackage);
+        WebApkTestHelper.registerWebApkWithMetaData(WEBAPK_PACKAGE_NAME, bundle);
+    }
+}