Be explicit about target type in platform_util::OpenItem()

chrome/browser/platform_util_unittest.cc

Index: chrome/browser/platform_util_unittest.cc
diff --git a/chrome/browser/platform_util_unittest.cc b/chrome/browser/platform_util_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..def8bf4f51dc69702c400f2d90b112596b27d05d
--- /dev/null
+++ b/chrome/browser/platform_util_unittest.cc
@@ -0,0 +1,281 @@
+// Copyright 2015 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/platform_util.h"
+
+#include "base/bind.h"
+#include "base/callback.h"
+#include "base/files/file_util.h"
+#include "base/files/scoped_temp_dir.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/run_loop.h"
+#include "chrome/browser/platform_util_internal.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+#if defined(OS_CHROMEOS)
+#include "base/json/json_string_value_serializer.h"
+#include "base/values.h"
+#include "chrome/browser/chrome_content_browser_client.h"
+#include "chrome/browser/chromeos/file_manager/app_id.h"
+#include "chrome/browser/chromeos/fileapi/file_system_backend.h"
+#include "chrome/browser/extensions/extension_special_storage_policy.h"
+#include "chrome/test/base/browser_with_test_window_test.h"
+#include "content/public/browser/browser_context.h"
+#include "content/public/common/content_client.h"
+#include "content/public/test/mock_special_storage_policy.h"
+#include "extensions/browser/extension_registry.h"
+#include "extensions/common/extension.h"
+#include "storage/browser/fileapi/external_mount_points.h"
+#include "storage/common/fileapi/file_system_types.h"
+#else
+#include "content/public/test/test_browser_thread_bundle.h"
+#endif
+
+namespace platform_util {
+
+namespace {
+
+#if defined(OS_CHROMEOS)
+
+// ChromeContentBrowserClient subclass that sets up a custom file system backend
+// that allows the test to grant file access to the file manager extension ID
+// without having to install the extension.
+class PlatformUtilTestContentBrowserClient
+    : public chrome::ChromeContentBrowserClient {
+ public:
+  void GetAdditionalFileSystemBackends(
+      content::BrowserContext* browser_context,
+      const base::FilePath& storage_partition_path,
+      ScopedVector<storage::FileSystemBackend>* additional_backends) override {
+    storage::ExternalMountPoints* external_mount_points =
+        content::BrowserContext::GetMountPoints(browser_context);
+    scoped_refptr<content::MockSpecialStoragePolicy> special_storage_policy =
+        new content::MockSpecialStoragePolicy();
+
+    // New FileSystemBackend that uses our MockSpecialStoragePolicy.
+    chromeos::FileSystemBackend* backend = new chromeos::FileSystemBackend(
+        NULL, NULL, NULL, special_storage_policy, external_mount_points,
+        storage::ExternalMountPoints::GetSystemInstance());
+    additional_backends->push_back(backend);
+
+    // The only change we need to make is to add kFileManagerAppId as a file
+    // handler.
+    special_storage_policy->AddFileHandler(file_manager::kFileManagerAppId);
+  }
+};
+
+// Base test fixture class to be used on Chrome OS.
+class PlatformUtilTestBase : public BrowserWithTestWindowTest {
+ protected:
+  void SetUpPlatformFixture(const base::FilePath& test_directory) {
+    content::SetBrowserClientForTesting(
+        new PlatformUtilTestContentBrowserClient());
+
+    // The test_directory needs to be mounted for it to be accessible.
+    content::BrowserContext::GetMountPoints(GetProfile())
+        ->RegisterFileSystem("test", storage::kFileSystemTypeNativeLocal,
+                             storage::FileSystemMountOption(), test_directory);
+
+    // To test opening a file, we are going to register a mock extension that
+    // handles .txt files. The extension doesn't actually need to exist due to
+    // the DisableShellOperationsForTesting() call which prevents the extension
+    // from being invoked.
+    std::string error;
+    int error_code = 0;
+
+    std::string json_manifest =
+        "{"
+        "  \"manifest_version\": 2,"
+        "  \"name\": \"Test extension\","
+        "  \"version\": \"0\","
+        "  \"app\": { \"background\": { \"scripts\": [\"main.js\"] }},"
+        "  \"file_handlers\": {"
+        "    \"text\": {"
+        "      \"extensions\": [ \"txt\" ],"
+        "      \"title\": \"Text\""
+        "      }"
+        "    }"
+        "}";
+    JSONStringValueSerializer json_string_serializer(json_manifest);
+    scoped_ptr<base::Value> manifest(
+        json_string_serializer.Deserialize(&error_code, &error));
+    base::DictionaryValue* manifest_dictionary;
+
+    manifest->GetAsDictionary(&manifest_dictionary);
+    ASSERT_TRUE(manifest_dictionary);
+
+    scoped_refptr<extensions::Extension> extension =
+        extensions::Extension::Create(
+            test_directory.AppendASCII("invalid-extension"),
+            extensions::Manifest::INVALID_LOCATION, *manifest_dictionary,
+            extensions::Extension::NO_FLAGS, &error);
+    ASSERT_TRUE(error.empty()) << error;
+    extensions::ExtensionRegistry::Get(GetProfile())->AddEnabled(extension);
+  }
+};
+
+#else
+
+// Test fixture used by all desktop platforms other than Chrome OS.
+class PlatformUtilTestBase : public testing::Test {
+ protected:
+  Profile* GetProfile() { return NULL; }
+  void SetUpPlatformFixture(const base::FilePath&) {}
+
+ private:
+  content::TestBrowserThreadBundle thread_bundle_;
+};
+
+#endif
+
+class PlatformUtilTest : public PlatformUtilTestBase {
+ public:
+  void SetUp() override {
+    ASSERT_NO_FATAL_FAILURE(PlatformUtilTestBase::SetUp());
+
+    static const char kTestFileData[] = "Cow says moo!";
+    const int kTestFileDataLength = arraysize(kTestFileData) - 1;
+
+    // This prevents platfrom_util from invoking any shell or external APIs
+    // during tests. Doing so may result in external applications being launched
+    // and intefering with tests.
+    internal::DisableShellOperationsForTesting();
+
+    ASSERT_TRUE(directory_.CreateUniqueTempDir());
+
+    // A valid file.
+    existing_file_ = directory_.path().AppendASCII("test_file.txt");
+    ASSERT_EQ(
+        kTestFileDataLength,
+        base::WriteFile(existing_file_, kTestFileData, kTestFileDataLength));
+
+    // A valid folder.
+    existing_folder_ = directory_.path().AppendASCII("test_folder");
+    ASSERT_TRUE(base::CreateDirectory(existing_folder_));
+
+    // A non-existent path.
+    nowhere_ = directory_.path().AppendASCII("nowhere");
+
+    SetUpPlatformFixture(directory_.path());
+  }
+
+  OpenOperationResult CallOpenFile(const base::FilePath& path) {
+    return InvokeOpenMethodAndReturnResult(&OpenFile, path);
+  }
+
+  OpenOperationResult CallOpenFolder(const base::FilePath& path) {
+    return InvokeOpenMethodAndReturnResult(&OpenFolder, path);
+  }
+
+  base::FilePath existing_file_;
+  base::FilePath existing_folder_;
+  base::FilePath nowhere_;
+
+ protected:
+  base::ScopedTempDir directory_;
+
+ private:
+  scoped_ptr<base::RunLoop> run_loop_;
+
+  OpenOperationResult InvokeOpenMethodAndReturnResult(
+      void (*function)(Profile*,
+                       const base::FilePath&,
+                       const OpenOperationCallback&),
+      const base::FilePath& path) {
+    base::RunLoop run_loop;
+    OpenOperationResult result = OPEN_SUCCEEDED;
+    OpenOperationCallback callback =
+        base::Bind(&OnOpenOperationDone, run_loop.QuitClosure(), &result);
+    (*function)(GetProfile(), path, callback);
+    run_loop.Run();
+    return result;
+  }
+
+  static void OnOpenOperationDone(const base::Closure& closure,
+                                  OpenOperationResult* store_result,
+                                  OpenOperationResult result) {
+    *store_result = result;
+    closure.Run();
+  }
+};
+
+}  // namespace
+
+TEST_F(PlatformUtilTest, OpenFile) {
+  EXPECT_EQ(OPEN_SUCCEEDED, CallOpenFile(existing_file_));
+  EXPECT_EQ(OPEN_FAILED_INVALID_TYPE, CallOpenFile(existing_folder_));
+  EXPECT_EQ(OPEN_FAILED_PATH_NOT_FOUND, CallOpenFile(nowhere_));
+}
+
+TEST_F(PlatformUtilTest, OpenFolder) {
+  EXPECT_EQ(OPEN_SUCCEEDED, CallOpenFolder(existing_folder_));
+  EXPECT_EQ(OPEN_FAILED_INVALID_TYPE, CallOpenFolder(existing_file_));
+  EXPECT_EQ(OPEN_FAILED_PATH_NOT_FOUND, CallOpenFolder(nowhere_));
+}
+
+#if defined(OS_POSIX)
+// Symbolic links are currently only supported on Posix. Windows technically
+// supports it as well, but not on Windows XP.
+class PlatformUtilPosixTest : public PlatformUtilTest {
+ public:
+  void SetUp() override {
+    ASSERT_NO_FATAL_FAILURE(PlatformUtilTest::SetUp());
+
+    symlink_to_file_ = directory_.path().AppendASCII("l_file.txt");
+    ASSERT_TRUE(base::CreateSymbolicLink(existing_file_, symlink_to_file_));
+    symlink_to_folder_ = directory_.path().AppendASCII("l_folder");
+    ASSERT_TRUE(base::CreateSymbolicLink(existing_folder_, symlink_to_folder_));
+    symlink_to_nowhere_ = directory_.path().AppendASCII("l_nowhere");
+    ASSERT_TRUE(base::CreateSymbolicLink(nowhere_, symlink_to_nowhere_));
+  }
+
+ protected:
+  base::FilePath symlink_to_file_;
+  base::FilePath symlink_to_folder_;
+  base::FilePath symlink_to_nowhere_;
+};
+#endif  // OS_POSIX
+
+#if defined(OS_CHROMEOS)
+// ChromeOS doesn't follow symbolic links in sandboxed filesystems. So all the
+// symbolic link tests should return PATH_NOT_FOUND.
+
+TEST_F(PlatformUtilPosixTest, OpenFileWithPosixSymlinksChromeOS) {
+  EXPECT_EQ(OPEN_FAILED_PATH_NOT_FOUND, CallOpenFile(symlink_to_file_));
+  EXPECT_EQ(OPEN_FAILED_PATH_NOT_FOUND, CallOpenFile(symlink_to_folder_));
+  EXPECT_EQ(OPEN_FAILED_PATH_NOT_FOUND, CallOpenFile(symlink_to_nowhere_));
+}
+
+TEST_F(PlatformUtilPosixTest, OpenFolderWithPosixSymlinksChromeOS) {
+  EXPECT_EQ(OPEN_FAILED_PATH_NOT_FOUND, CallOpenFolder(symlink_to_folder_));
+  EXPECT_EQ(OPEN_FAILED_PATH_NOT_FOUND, CallOpenFolder(symlink_to_file_));
+  EXPECT_EQ(OPEN_FAILED_PATH_NOT_FOUND, CallOpenFolder(symlink_to_nowhere_));
+}
+
+TEST_F(PlatformUtilTest, OpenFileWithUnhandledFileType) {
+  base::FilePath unhandled_file =
+      directory_.path().AppendASCII("myfile.filetype");
+  ASSERT_EQ(3, base::WriteFile(unhandled_file, "cat", 3));
+  EXPECT_EQ(OPEN_FAILED_NO_HANLDER_FOR_FILE_TYPE, CallOpenFile(unhandled_file));
+}
+#endif  // OS_CHROMEOS
+
+#if defined(OS_POSIX) && !defined(OS_CHROMEOS)
+// On all other Posix platforms, the symbolic link tests should work as
+// expected.
+
+TEST_F(PlatformUtilPosixTest, OpenFileWithPosixSymlinks) {
+  EXPECT_EQ(OPEN_SUCCEEDED, CallOpenFile(symlink_to_file_));
+  EXPECT_EQ(OPEN_FAILED_INVALID_TYPE, CallOpenFile(symlink_to_folder_));
+  EXPECT_EQ(OPEN_FAILED_PATH_NOT_FOUND, CallOpenFile(symlink_to_nowhere_));
+}
+
+TEST_F(PlatformUtilPosixTest, OpenFolderWithPosixSymlinks) {
+  EXPECT_EQ(OPEN_SUCCEEDED, CallOpenFolder(symlink_to_folder_));
+  EXPECT_EQ(OPEN_FAILED_INVALID_TYPE, CallOpenFolder(symlink_to_file_));
+  EXPECT_EQ(OPEN_FAILED_PATH_NOT_FOUND, CallOpenFolder(symlink_to_nowhere_));
+}
+#endif  // OS_POSIX && !OS_CHROMEOS
+
+}  // namespace platform_util