[fsp] Add the getMetadata operation.

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

+// 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';
+
+var fileSystemId;
+var fileSystem;
+
+/**
+ * @type {Object}
+ * @const
+ */
+var TESTING_ROOT = Object.freeze({
+  isDirectory: true,
+  name: '',
+  size: 0,
+  modificationTime: new Date(2013, 3, 27, 9, 38, 14)
+});
+
+/**
+ * @type {Object}
+ * @const
+ */
+var TESTING_FILE = Object.freeze({
+  isDirectory: false,
+  name: 'tiramisu.txt',
+  size: 4096,
+  modificationTime: new Date(2014, 4, 28, 10, 39, 15)
+});
+
+/**
+ * Returns metadata for a requested entry.
+ *
+ * @param {number} inFileSystemId ID of the file system.
+ * @param {string} entryPath Path of the requested entry.
+ * @param {function(Object)} onSuccess Success callback with metadata passed
+ *     an argument.
+ * @param {function(string}} onError Error callback with an error code.
+ */
+function onGetMetadataRequested(
+    inFileSystemId, entryPath, onSuccess, onError) {
+  if (inFileSystemId != fileSystemId) {
+    onError('SECURITY_ERROR');  // enum ProviderError.
+    return;
+  }
+
+  if (entryPath == '/') {
+    onSuccess(TESTING_ROOT);
+    return;
+  }
+
+  if (entryPath == '/' + TESTING_FILE.name) {
+    onSuccess(TESTING_FILE);
+    return;
+  }
+
+  onError('NOT_FOUND');  // enum ProviderError.
+}
+
+/**
+ * Sets up the tests. Called once per all test cases. In case of a failure,
+ * the callback is not called.
+ *
+ * @param {function()} callback Success callback.
+ */
+function setUp(callback) {
+  chrome.fileSystemProvider.mount('chocolate.zip', function(id) {
+    fileSystemId = id;
+    chrome.fileSystemProvider.onGetMetadataRequested.addListener(
+        onGetMetadataRequested);
+    var volumeId =
+        'provided:' + chrome.runtime.id + '-' + fileSystemId + '-user';
+
+    chrome.fileBrowserPrivate.requestFileSystem(
+        volumeId,
+        function(inFileSystem) {
+          chrome.test.assertTrue(!!inFileSystem);
+
+          fileSystem = inFileSystem;
+          callback();
+        });
+  }, function() {
+    chrome.test.fail();
+  });
+}
+
+/**
+ * Runs all of the test cases, one by one.
+ */
+function runTests() {
+  chrome.test.runTests([
+    // Read metadata of the root.
+    function getFileMetadataSuccess() {
+      var onSuccess = chrome.test.callbackPass(function() {});
+      fileSystem.root.getMetadata(
+        function(metadata) {
+          chrome.test.assertEq(TESTING_ROOT.size, metadata.size);
+          chrome.test.assertEq(
+              TESTING_ROOT.modificationTime.toString(),
+              metadata.modificationTime.toString());
+          onSuccess();
+        }, function(error) {
+          chrome.test.fail(error.name);
+        });
+    },
+    // Read metadata of an existing testing file.
+    function getFileMetadataSuccess() {
+      var onSuccess = chrome.test.callbackPass(function() {});
+      fileSystem.root.getFile(
+          TESTING_FILE.name,
+          {create: false},
+          function(fileEntry) {
+            chrome.test.assertEq(TESTING_FILE.name, fileEntry.name);
+            chrome.test.assertEq(
+                TESTING_FILE.isDirectory, fileEntry.isDirectory);
+            fileEntry.getMetadata(function(metadata) {
+              chrome.test.assertEq(TESTING_FILE.size, metadata.size);
+              chrome.test.assertEq(
+                  TESTING_FILE.modificationTime.toString(),
+                  metadata.modificationTime.toString());
+              onSuccess();
+            }, function(error) {
+              chrome.test.fail(error.name);
+            });
+          },
+          function(error) {
+            chrome.test.fail(error.name);
+          });
+    },
+    // Read metadata of a directory which does not exist, what should return an
+    // error. DirectoryEntry.getDirectory() causes fetching metadata.
+    function getFileMetadataNotFound() {
+      var onSuccess = chrome.test.callbackPass(function() {});
+      fileSystem.root.getDirectory(
+          'cranberries',
+          {create: false},
+          function(dirEntry) {
+            chrome.test.fail();
+          },
+          function(error) {
+            chrome.test.assertEq('NotFoundError', error.name);
+            onSuccess();
+          });
+    },
+    // Read metadata of a file using getDirectory(). An error should be returned
+    // because of type mismatching. DirectoryEntry.getDirectory() causes
+    // fetching metadata.
+    function getFileMetadataWrongType() {
+      var onSuccess = chrome.test.callbackPass(function() {});
+      fileSystem.root.getDirectory(
+          TESTING_FILE.name,
+          {create: false},
+          function(fileEntry) {
+            chrome.test.fail();
+          },
+          function(error) {
+            chrome.test.assertEq('TypeMismatchError', error.name);
+            onSuccess();
+          });
+    }
+  ]);
+}
+
+// Setup and run all of the test cases.
+setUp(runTests);