MediaScanner improvements

ui/file_manager/file_manager/common/js/unittest_util.js

Index: ui/file_manager/file_manager/common/js/unittest_util.js
diff --git a/ui/file_manager/file_manager/common/js/unittest_util.js b/ui/file_manager/file_manager/common/js/unittest_util.js
index 27501222c74efde364b97ec91c7cb4edd37e07e6..aacecae4a3e2c8c3e809724bfa6025c407e314ba 100644
--- a/ui/file_manager/file_manager/common/js/unittest_util.js
+++ b/ui/file_manager/file_manager/common/js/unittest_util.js
@@ -40,6 +40,47 @@ function waitUntil(testFunction) {
 }
 
 /**
+ * Asserts that two lists contain the same set of Entries.  Entries are deemed
+ * to be the same if they point to the same full path.
+ *
+ * @param {!Array.<!FileEntry>} expected
+ * @param {!Array.<!FileEntry>} actual
+ */
+function assertFileEntryListEquals(expected, actual) {
+
+  var entryToPath = function(entry) {
+    assertTrue(entry.isFile);
+    return entry.fullPath;
+  };
+
+  assertFileEntryPathsEqual(expected.map(entryToPath), actual);
+}
+
+/**
+ * Asserts that a list of FileEntry instances point to the expected paths.
+ *
+ * @param {!Array.<string>} expectedPaths
+ * @param {!Array.<!FileEntry>} fileEntries
+ */
+function assertFileEntryPathsEqual(expectedPaths, fileEntries) {
+  assertEquals(expectedPaths.length, fileEntries.length);
+
+  var entryToPath = function(entry) {
+    assertTrue(entry.isFile);
+    return entry.fullPath;
+  };
+
+  var actualPaths = fileEntries.map(entryToPath);
+  actualPaths.sort();
+  expectedPaths = expectedPaths.slice();
+  expectedPaths.sort();
+
+  assertEquals(
+      JSON.stringify(expectedPaths),
+      JSON.stringify(actualPaths));
+}
+
+/**
  * A class that captures calls to a funtion so that values can be validated.
  * For use in tests only.
  *