[fsp] Add a method to enumerate all mounted file systems.

chrome/test/data/extensions/api_test/file_system_provider/get_all/test.js

Index: chrome/test/data/extensions/api_test/file_system_provider/get_all/test.js
diff --git a/chrome/test/data/extensions/api_test/file_system_provider/get_all/test.js b/chrome/test/data/extensions/api_test/file_system_provider/get_all/test.js
new file mode 100644
index 0000000000000000000000000000000000000000..059ca6c99c3488eb3b8d6e70f1e82af78552a8b6
--- /dev/null
+++ b/chrome/test/data/extensions/api_test/file_system_provider/get_all/test.js
@@ -0,0 +1,70 @@
+// Copyright 2014 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.
+
+'use strict';
+
+/**
+ * Runs all of the test cases, one by one.
+ */
+chrome.test.runTests([
+  // Verifies if getAll() returns the mounted file system.
+  function mountSuccess() {
+    var onTestSuccess = chrome.test.callbackPass();
+    chrome.fileSystemProvider.mount(
+        {
+          fileSystemId: test_util.FILE_SYSTEM_ID,
+          displayName: test_util.FILE_SYSTEM_NAME
+        },
+        function() {
+          chrome.fileSystemProvider.getAll(function(fileSystems) {
+            chrome.test.assertEq(1, fileSystems.length);
+            chrome.test.assertEq(
+                test_util.FILE_SYSTEM_ID, fileSystems[0].fileSystemId);
+            chrome.test.assertEq(
+                test_util.FILE_SYSTEM_NAME, fileSystems[0].displayName);
+            chrome.test.assertFalse(fileSystems[0].writable);
+            onTestSuccess();
+          });
+        },
+        function(error) {
+          chrome.test.fail(error.name);
+        });
+  },
+
+  // Verifies that after unmounting, the file system is not available in
+  // getAll() list.
+  function unmountSuccess() {
+    var onTestSuccess = chrome.test.callbackPass();
+    chrome.fileSystemProvider.unmount(
+        {fileSystemId: test_util.FILE_SYSTEM_ID},
+        function() {
+          chrome.fileSystemProvider.getAll(function(fileSystems) {
+            chrome.test.assertEq(0, fileSystems.length);
+          });
+          onTestSuccess();
+        },
+        function(error) {
+          chrome.test.fail(error.name);
+        });
+  },
+
+  // Verifies that if mounting fails, then the file system is not added to the
+  // getAll() list.
+  function mountError() {
+    var onTestSuccess = chrome.test.callbackPass();
+    chrome.fileSystemProvider.mount(
+        {fileSystemId: '', displayName: ''},
+        function() {
+          chrome.test.fail();
+        },
+        function(error) {
+          chrome.test.assertEq('SecurityError', error.name);
+          chrome.fileSystemProvider.getAll(function(fileSystems) {
+            chrome.test.assertEq(0, fileSystems.length);
+          });
+          onTestSuccess();
+        }
+      );
+  }
+]);