[fsp] Introduce file_system_provider::Service class for the FileSystemProvider API.

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

 // Copyright 2013 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.
 
 chrome.test.runTests([
   function goodDisplayName() {
     chrome.fileSystemProvider.mount(
       'test file system',
       function(fileSystemId) {
         chrome.test.assertEq('string', typeof(fileSystemId));
         chrome.test.assertTrue(fileSystemId != '');
         chrome.test.succeed();
       },
       function(error) {
         chrome.test.fail();
       }
     );
   },
+
   function emptyDisplayName() {
     chrome.fileSystemProvider.mount(
       '',
       function(fileSystemId) {
         chrome.test.fail();
       },
       function(error) {
         chrome.test.assertEq('SecurityError', error.name);
         chrome.test.succeed();
       }
     );
   },
+
+  function successfulMount() {
+    chrome.fileSystemProvider.mount(
+      'caramel-candy.zip',
+      function(fileSystemId) {
+        chrome.test.assertTrue(fileSystemId != '');
+        chrome.fileBrowserPrivate.getVolumeMetadataList(function(volumeList) {
+          var found = volumeList.filter(function(volumeInfo) {
+            return volumeInfo.volumeId == 'provided:' + fileSystemId;
+          });
+          chrome.test.assertEq(1, found.length);
+          chrome.test.succeed();
+        });
+      },
+      function(error) {
+        chrome.test.fail();
+      });
+  },
+
+  function stressMountTest() {

[satorux1, 2014/03/26 07:55:37]

nice test!

[mtomasz, 2014/03/26 09:21:43]

Thx!

+    // Try to create more than allowed number of file systems. All of the mount
+    // requests should succeed, except the last one which should fail with a
+    // security error.
+    var ALREADY_MOUNTED_FILE_SYSTEMS = 2;  // By previous tests.
+    var MAX_FILE_SYSTEMS = 16;
+    var index = 0;
+    var tryNextOne = function() {
+      index++;
+      if (index < MAX_FILE_SYSTEMS - ALREADY_MOUNTED_FILE_SYSTEMS + 1) {
+        chrome.fileSystemProvider.mount(
+            index + 'th file system',
+            function(fileSystemId) {
+              chrome.test.assertTrue(fileSystemId != '');
+              tryNextOne();
+            },
+            chrome.test.fail);
+      } else {
+        chrome.fileSystemProvider.mount(
+            'over the limit fs',
+            chrome.test.fail,
+            function(error) {
+              chrome.test.assertEq('SecurityError', error.name);
+              chrome.test.succeed();
+            });
+      }
+    };
+    tryNextOne();
+  }
 ]);