Fix up _some_web app directory StrictMode violations

chrome/android/javatests/src/org/chromium/chrome/browser/webapps/WebappDirectoryManagerTest.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/webapps/WebappDirectoryManagerTest.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/webapps/WebappDirectoryManagerTest.java b/chrome/android/javatests/src/org/chromium/chrome/browser/webapps/WebappDirectoryManagerTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..199ce0f3db9f0b42eeaef981fc01873396b85969
--- /dev/null
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/webapps/WebappDirectoryManagerTest.java
@@ -0,0 +1,156 @@
+// Copyright 2015 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.chrome.browser.webapps;
+
+import android.content.Intent;
+import android.net.Uri;
+import android.os.AsyncTask;
+import android.os.Build;
+import android.test.InstrumentationTestCase;
+import android.test.suitebuilder.annotation.SmallTest;
+
+import org.chromium.base.FileUtils;
+import org.chromium.content.browser.test.util.Criteria;
+import org.chromium.content.browser.test.util.CriteriaHelper;
+
+import java.io.File;
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * Tests that directories for WebappActivities are managed correctly.
+ */
+public class WebappDirectoryManagerTest extends InstrumentationTestCase {
+    private static final String TAG = "webapps_WebappDirect";
+
+    private static final String WEBAPP_ID_1 = "webapp_1";
+    private static final String WEBAPP_ID_2 = "webapp_2";
+    private static final String WEBAPP_ID_3 = "webapp_3";
+
+    private class TestWebappDirectoryManager extends WebappDirectoryManager {
+        private Set<Intent> mBaseIntents = new HashSet<Intent>();
+
+        @Override
+        protected String getBaseDataDirectory() {
+            File cacheDirectory = getInstrumentation().getTargetContext().getCacheDir();
+            return new File(cacheDirectory, "WebappDirectoryManagerTest").getAbsolutePath();
+        }
+
+        @Override
+        protected File getBaseWebappDirectory() {
+            return new File(getBaseDataDirectory(), "app_" + WEBAPP_DIRECTORY_NAME);
+        }
+
+        @Override
+        protected File getWebappDirectory(WebappActivity activity) {
+            // Pretend that the handed in WebappActivity has the ID WEBAPP_ID_1.  Ideally we'd be
+            // able to pass in a WebappActivity with the right ID but that'd require launching one.
+            return WebappDirectoryManager.getWebappDirectory(WEBAPP_ID_1);
+        }
+
+        @Override
+        protected Set<Intent> getBaseIntentsForAllTasks() {
+            return mBaseIntents;
+        }
+    }
+
+    private TestWebappDirectoryManager mWebappDirectoryManager;
+
+    @Override
+    public void setUp() throws Exception {
+        super.setUp();
+        mWebappDirectoryManager = new TestWebappDirectoryManager();
+
+        // Set up the base directories.
+        File baseDirectory = new File(mWebappDirectoryManager.getBaseDataDirectory());
+        FileUtils.recursivelyDeleteFile(baseDirectory);
+        assertTrue(baseDirectory.mkdirs());
+    }
+
+    @Override
+    public void tearDown() throws Exception {
+        // Nuke everything.
+        File baseDirectory = new File(mWebappDirectoryManager.getBaseDataDirectory());
+        FileUtils.recursivelyDeleteFile(baseDirectory);
+
+        super.tearDown();
+    }
+
+    @SmallTest
+    public void testDeletesOwnDirectory() throws Exception {
+        File webappDirectory = new File(
+                mWebappDirectoryManager.getBaseWebappDirectory(), WEBAPP_ID_1);
+        assertTrue(webappDirectory.mkdirs());
+
+        // Confirm that it deletes the current web app's directory.
+        mWebappDirectoryManager.execute();
+        waitForAsyncTaskToFinish(mWebappDirectoryManager);
+        assertFalse(webappDirectory.exists());
+    }
+
+    /**
+     * On Lollipop and higher, the {@link WebappDirectoryManager} also deletes directories for web
+     * apps that no longer correspond to tasks in Recents.
+     */
+    @SmallTest
+    public void testDeletesDirectoriesForDeadTasks() throws Exception {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) return;
+
+        // Track the three web app directories.
+        File directory1 = new File(
+                mWebappDirectoryManager.getBaseWebappDirectory(), WEBAPP_ID_1);
+        File directory2 = new File(
+                mWebappDirectoryManager.getBaseWebappDirectory(), WEBAPP_ID_2);
+        File directory3 = new File(
+                mWebappDirectoryManager.getBaseWebappDirectory(), WEBAPP_ID_3);
+
+        // Seed the directory with folders for web apps.
+        assertTrue(directory1.mkdirs());
+        assertTrue(directory2.mkdirs());
+        assertTrue(directory3.mkdirs());
+
+        // Indicate that another of the web apps is listed in Recents; in real usage this web app
+        // would not be in the foreground and would have persisted its state.
+        mWebappDirectoryManager.mBaseIntents.add(
+                new Intent(Intent.ACTION_VIEW, Uri.parse("webapp://webapp_2")));
+
+        // Only the directory for the background web app should survive.
+        mWebappDirectoryManager.execute();
+        waitForAsyncTaskToFinish(mWebappDirectoryManager);
+        assertFalse(directory1.exists());
+        assertTrue(directory2.exists());
+        assertFalse(directory3.exists());
+    }
+
+    @SmallTest
+    public void testDeletesObsoleteDirectories() throws Exception {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) return;
+
+        // Seed the base directory with folders that correspond to pre-L web apps.
+        File baseDirectory = new File(mWebappDirectoryManager.getBaseDataDirectory());
+        File webappDirectory1 = new File(baseDirectory, "app_WebappActivity1");
+        File webappDirectory6 = new File(baseDirectory, "app_WebappActivity6");
+        File nonWebappDirectory = new File(baseDirectory, "app_ChromeDocumentActivity");
+        assertTrue(webappDirectory1.mkdirs());
+        assertTrue(webappDirectory6.mkdirs());
+        assertTrue(nonWebappDirectory.mkdirs());
+
+        // Make sure only the web app folders are deleted.
+        mWebappDirectoryManager.execute();
+        waitForAsyncTaskToFinish(mWebappDirectoryManager);
+        assertFalse(webappDirectory1.exists());
+        assertFalse(webappDirectory6.exists());
+        assertTrue(nonWebappDirectory.exists());
+    }
+
+    private void waitForAsyncTaskToFinish(final AsyncTask task) throws Exception {
+        assertTrue(CriteriaHelper.pollForCriteria(new Criteria() {
+            @Override
+            public boolean isSatisfied() {
+                return task.getStatus() == AsyncTask.Status.FINISHED;
+            }
+        }));
+    }
+}