drive: Fix a bug where special directories are suggested from autocomplete

chrome/browser/chromeos/drive/search_metadata_unittest.cc

 // Copyright (c) 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.
 
 #include "chrome/browser/chromeos/drive/search_metadata.h"
 
 #include "base/files/scoped_temp_dir.h"
 #include "base/message_loop.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "chrome/browser/chromeos/drive/drive_file_system_util.h"
@@ skipping 307 matching lines @@
                      &error, &result));
 
   google_apis::test_util::RunBlockingPoolTask();
   EXPECT_EQ(DRIVE_FILE_OK, error);
   ASSERT_EQ(1U, result->size());
 
   EXPECT_EQ("drive/root/Document 1 excludeDir-test.gdoc",
             result->at(0).path.AsUTF8Unsafe());
 }
 
+// "drive", "drive/root", "drive/other" should be excluded.
+TEST_F(SearchMetadataTest, SearchMetadata_ExcludeSpecialDirectories) {
+  const char* kQueries[] = { "drive", "root", "other" };
+  for (size_t i = 0; i < arraysize(kQueries); ++i) {
+    DriveFileError error = DRIVE_FILE_ERROR_FAILED;
+    scoped_ptr<MetadataSearchResultVector> result;
+
+    const std::string query = kQueries[i];
+    SearchMetadata(resource_metadata_.get(),
+                   query,
+                   SEARCH_METADATA_ALL,
+                   kDefaultAtMostNumMatches,
+                   google_apis::test_util::CreateCopyResultCallback(
+                       &error, &result));
+
+    google_apis::test_util::RunBlockingPoolTask();
+    EXPECT_EQ(DRIVE_FILE_OK, error);
+    ASSERT_TRUE(result->empty()) << ": " << query << " should not match";
+  }
+}
+
 TEST(SearchMetadataSimpleTest, FindAndHighlight_ZeroMatches) {
   std::string highlighted_text;
   EXPECT_FALSE(FindAndHighlight("text", "query", &highlighted_text));
 }
 
 TEST(SearchMetadataSimpleTest, FindAndHighlight_EmptyQuery) {
   std::string highlighted_text;
   EXPECT_TRUE(FindAndHighlight("text", "", &highlighted_text));
   EXPECT_EQ("", highlighted_text);
 }
@@ skipping 51 matching lines @@
   EXPECT_EQ("&lt;<b>hello</b>&gt;", highlighted_text);
 }
 
 TEST(SearchMetadataSimpleTest, FindAndHighlight_MoreMetaChars) {
   std::string highlighted_text;
   EXPECT_TRUE(FindAndHighlight("a&b&c&d", "b&c", &highlighted_text));
   EXPECT_EQ("a&amp;<b>b&amp;c</b>&amp;d", highlighted_text);
 }
 
 }   // namespace drive