Add unit tests for the CLD component installer

chrome/browser/component_updater/test/cld_component_installer_unittest.cc

+// 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.
+
+#include <vector>
+
+#include "base/file_util.h"
+#include "base/files/file_path.h"
+#include "base/files/scoped_temp_dir.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/run_loop.h"
+#include "base/strings/string_util.h"
+#include "base/strings/utf_string_conversions.h"
+#include "base/values.h"
+#include "base/version.h"
+#include "chrome/browser/component_updater/cld_component_installer.h"
+#include "chrome/common/chrome_constants.h"
+#include "chrome/common/chrome_paths.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/platform_test.h"
+
+namespace component_updater {
+
+class CldComponentInstallerTest : public PlatformTest {
+ public:
+  virtual void SetUp() OVERRIDE {
+    PlatformTest::SetUp();
+
+    // ScopedTempDir automatically does a recursive delete on the entire
+    // directory in its destructor, so no cleanup is required in TearDown.
+    // Note that all files created by this test case are created within the
+    // directory that is created here, so even though they are not explicitly
+    // created *as temp files*, they will still get cleaned up automagically.
+    ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
+
+    // The "latest CLD data file" is a static piece of information, and thus
+    // for correctness we empty it before each test.
+    traits.SetLatestCldDataFile(base::FilePath());
+  }
+
+  base::ScopedTempDir temp_dir_;
+  component_updater::CldComponentInstallerTraits traits;
+};
+
+TEST_F(CldComponentInstallerTest, SetLatestCldDataFile) {
+  ASSERT_TRUE(component_updater::GetLatestCldDataFile().empty());
+  const base::FilePath expected(FILE_PATH_LITERAL("test/foo.test"));
+  traits.SetLatestCldDataFile(expected);
+
+  base::FilePath result = component_updater::GetLatestCldDataFile();
+  ASSERT_EQ(expected, result);
+}
+
+TEST_F(CldComponentInstallerTest, VerifyInstallation) {
+  // All files are created within a ScopedTempDir, which deletes all
+  // children when its destructor is called (at the end of each test).
+  ASSERT_FALSE(traits.VerifyInstallation(temp_dir_.path()));
+  const base::FilePath data_file_dir =
+      temp_dir_.path().Append(FILE_PATH_LITERAL("_platform_specific")).Append(
+          FILE_PATH_LITERAL("all"));
+  ASSERT_TRUE(base::CreateDirectory(data_file_dir));
+  const base::FilePath data_file =
+      data_file_dir.Append(chrome::kCLDDataFilename);
+  const std::string test_data("fake cld2 data file content here :)");
+  ASSERT_EQ(static_cast<int32>(test_data.length()),
+            base::WriteFile(data_file, test_data.c_str(), test_data.length()));
+  ASSERT_TRUE(traits.VerifyInstallation(temp_dir_.path()));
+}
+
+TEST_F(CldComponentInstallerTest, OnCustomInstall) {
+  const base::DictionaryValue manifest;
+  const base::FilePath install_dir;
+  // Sanity: shouldn't crash.
+  ASSERT_TRUE(traits.OnCustomInstall(manifest, install_dir));
+}
+
+TEST_F(CldComponentInstallerTest, GetInstalledPath) {
+  const base::FilePath base_dir;
+  const base::FilePath result = traits.GetInstalledPath(base_dir);
+  ASSERT_TRUE(EndsWith(result.value(), chrome::kCLDDataFilename, true));
+}
+
+TEST_F(CldComponentInstallerTest, GetBaseDirectory) {
+  const base::FilePath result = traits.GetBaseDirectory();
+  ASSERT_FALSE(result.empty());
+}
+
+TEST_F(CldComponentInstallerTest, GetHash) {
+  std::vector<uint8> hash;
+  traits.GetHash(&hash);
+  ASSERT_EQ(static_cast<size_t>(32), hash.size());
+}
+
+TEST_F(CldComponentInstallerTest, GetName) {
+  ASSERT_FALSE(traits.GetName().empty());
+}
+
+TEST_F(CldComponentInstallerTest, ComponentReady) {
+  scoped_ptr<base::DictionaryValue> manifest;
+  const base::FilePath install_dir(FILE_PATH_LITERAL("/foo"));
+  const base::Version version("1.2.3.4");
+  traits.ComponentReady(version, install_dir, manifest.Pass());
+  base::FilePath result = component_updater::GetLatestCldDataFile();
+  ASSERT_TRUE(StartsWith(result.AsUTF16Unsafe(),
+                         install_dir.AsUTF16Unsafe(),
+                         true));
+  ASSERT_TRUE(EndsWith(result.value(), chrome::kCLDDataFilename, true));
+}
+
+}  // namespace component_updater