Revert of Add a media scanner convenience class.

chrome/test/data/file_manager/unit_tests/media_scanner_unittest.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.
-
-/**
- * Dummy private APIs.
- */
-var chrome;
-
-/**
- * Callbacks registered by setTimeout.
- * @type {Array.<function>}
- */
-var timeoutCallbacks;
-
-
-// Set up the test components.
-function setUp() {
-}
-
-/**
- * Creates a subdirectory within a temporary file system for testing.
- * @param {string} directoryName Name of the test directory to create.  Must be
- *     unique within this test suite.
- */
-function makeTestFilesystemRoot(directoryName) {
-  function makeTestFilesystem() {
-    return new Promise(function(resolve, reject) {
-      window.webkitRequestFileSystem(
-          window.TEMPORARY,
-          1024*1024,
-          resolve,
-          reject);
-    });
-  }
-
-  return makeTestFilesystem()
-      .then(
-          // Create a directory, pretend that's the root.
-          function(fs) {
-            return new Promise(function(resolve, reject) {
-              fs.root.getDirectory(
-                    directoryName,
-                    {
-                      create: true,
-                      exclusive: true
-                    },
-                  resolve,
-                  reject);
-            });
-          });
-}
-
-/**
- * Creates a set of files in the given directory.
- * @param {!Array<!Array|string>} filenames A (potentially nested) array of
- *     strings, reflecting a directory structure.
- * @param <!DirectoryEntry> The root of the directory tree.
- */
-function populateDir(filenames, dir) {
-  return Promise.all(
-      filenames.map(function(filename) {
-        if (filename instanceof Array) {
-          return new Promise(function(resolve, reject) {
-            dir.getDirectory(filename[0], {create: true}, resolve, reject);
-          }).then(populateDir.bind(null, filename));
-        } else {
-          return new Promise(function(resolve, reject) {
-            dir.getFile(filename, {create: true}, resolve, reject);
-          });
-        }
-      }));
-}
-
-/**
- * Verifies that scanning an empty filesystem produces an empty list.
- */
-function testEmptyList(errorIf) {
-  var scanner = new MediaScanner([]);
-  scanner.getFiles().then(function(files) {
-    errorIf(files.length !== 0);
-  });
-}
-
-/**
- * Verifies that scanning a simple single-level directory structure works.
- */
-function testSingleLevel(errorIf) {
-  var filenames = [
-      'foo',
-      'foo.jpg',
-      'bar.gif',
-      'baz.avi',
-      'foo.mp3',
-      'bar.txt'
-  ];
-  var expectedFiles = [
-      '/testSingleLevel/foo.jpg',
-      '/testSingleLevel/bar.gif',
-      '/testSingleLevel/baz.avi'
-  ];
-  makeTestFilesystemRoot('testSingleLevel')
-      .then(
-          /**
-           * Creates the test directory and populates it.
-           * @param {!DirectoryEntry} root
-           */
-          function(root) {
-            populateDir(filenames, root);
-            return root;
-          })
-      .then(
-          /**
-           * Scans the directory.
-           * @param {!DirectoryEntry} root
-           */
-          function(root) {
-            var scanner = new MediaScanner([root]);
-            return scanner.getFiles();
-          })
-      .then(
-          /**
-           * Verifies the results of the media scan.
-           * @param {!Array.<!FileEntry>} scanResults
-           */
-          function(scanResults) {
-            assertEquals(expectedFiles.length, scanResults.length);
-            scanResults.forEach(function(result) {
-              // Verify that the scanner only returns files.
-              assertTrue(result.isFile, result.fullPath + ' is not a file');
-              assertTrue(expectedFiles.indexOf(result.fullPath) != -1,
-                  result.fullPath + ' not found in control set');
-            });
-            // Signal test completion with no errors.
-            errorIf(false);
-          })
-      .catch(
-          function(e) {
-            // Catch failures and print them.
-            console.error(e);
-            errorIf(e);
-          });
-}
-
-function testMultiLevel(errorIf) {
-  var filenames = [
-      'foo.jpg',
-      'bar',
-      [
-          'foo.0',
-          'bar.0.jpg'
-      ],
-      [
-          'foo.1',
-          'bar.1.gif',
-          [
-              'foo.1.0',
-              'bar.1.0.avi'
-          ]
-      ]
-  ];
-  var expectedFiles = [
-      '/testMultiLevel/foo.jpg',
-      '/testMultiLevel/foo.0/bar.0.jpg',
-      '/testMultiLevel/foo.1/bar.1.gif',
-      '/testMultiLevel/foo.1/foo.1.0/bar.1.0.avi'
-  ];
-
-  makeTestFilesystemRoot('testMultiLevel')
-      .then(
-          /**
-           * Creates the test directory and populates it.
-           * @param {!DirectoryEntry} root
-           */
-          function(root) {
-            populateDir(filenames, root);
-            return root;
-          })
-      .then(
-          /**
-           * Scans the directory.
-           * @param {!DirectoryEntry} root
-           */
-          function(root) {
-            var scanner = new MediaScanner([root]);
-            return scanner.getFiles();
-          })
-      .then(
-          /**
-           * Verifies the results of the media scan.
-           * @param {!Array.<!FileEntry>} scanResults
-           */
-          function(scanResults) {
-            assertEquals(expectedFiles.length, scanResults.length);
-            scanResults.forEach(function(result) {
-              // Verify that the scanner only returns files.
-              assertTrue(result.isFile, result.fullPath + ' is not a file');
-              assertTrue(expectedFiles.indexOf(result.fullPath) != -1,
-                  result.fullPath + ' not found in control set');
-            });
-            // Signal test completion with no errors.
-            errorIf(false);
-          })
-      .catch(
-          function(e) {
-            // Catch failures and print them.
-            console.error(e);
-            errorIf(e);
-          });
-
-  errorIf(false);
-}
-
-function testMultipleDirectories(errorIf) {
-  var filenames = [
-      'foo',
-      'bar',
-      [
-          'foo.0',
-          'bar.0.jpg'
-      ],
-      [
-          'foo.1',
-          'bar.1.jpg',
-      ]
-  ];
-  // Expected file paths from the scan.  We're scanning the two subdirectories
-  // only.
-  var expectedFiles = [
-      '/testMultipleDirectories/foo.0/bar.0.jpg',
-      '/testMultipleDirectories/foo.1/bar.1.jpg'
-  ];
-
-  var getDirectory = function(root, dirname) {
-    return new Promise(function(resolve, reject) {
-      root.getDirectory(
-          dirname, {create: false}, resolve, reject);
-    });
-  };
-  makeTestFilesystemRoot('testMultipleDirectories')
-      .then(
-          /**
-           * Creates the test directory and populates it.
-           * @param {!DirectoryEntry} root
-           */
-          function(root) {
-            populateDir(filenames, root);
-            return root;
-          })
-      .then(
-          /**
-           * Scans the directories.
-           * @param {!DirectoryEntry} root
-           */
-          function(root) {
-            return Promise.all(['foo.0', 'foo.1'].map(
-                getDirectory.bind(null, root))).then(
-                    function(directories) {
-                      var scanner = new MediaScanner(directories);
-                      return scanner.getFiles();
-                    });
-          })
-      .then(
-          /**
-           * Verifies the results of the media scan.
-           * @param {!Array.<!FileEntry>} scanResults
-           */
-          function(scanResults) {
-            assertEquals(expectedFiles.length, scanResults.length);
-            scanResults.forEach(function(result) {
-              // Verify that the scanner only returns files.
-              assertTrue(result.isFile, result.fullPath + ' is not a file');
-              assertTrue(expectedFiles.indexOf(result.fullPath) != -1,
-                  result.fullPath + ' not found in control set');
-            });
-            // Signal test completion with no errors.
-            errorIf(false);
-          })
-      .catch(
-          function(e) {
-            // Catch failures and print them.
-            console.error(e);
-            errorIf(e);
-          });
-}