Refactor language detection logic to allow non-static CLD data sources.

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 <stdint.h>
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.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 "components/translate/content/browser/browser_cld_data_provider.h"
+#include "components/translate/content/common/cld_data_source.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 
 using component_updater::CldComponentInstallerTraits;
 
 namespace {
 // This has to match what's in cld_component_installer.cc.
 const base::FilePath::CharType kTestCldDataFileName[] =
     FILE_PATH_LITERAL("cld2_data.bin");
 
 }  // namespace
 
 namespace component_updater {
 
 class CldComponentInstallerTest : public PlatformTest {
  public:
   CldComponentInstallerTest() {}
   void SetUp() override {
     PlatformTest::SetUp();
+    translate::CldDataSource::DisableSanityChecksForTest();
 
     // 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.
     CldComponentInstallerTraits::SetLatestCldDataFile(base::FilePath());
     base::FilePath path_now =
         CldComponentInstallerTraits::GetLatestCldDataFile();
     ASSERT_TRUE(path_now.empty());
   }
 
+  void TearDown() override {
+    // Restore sanity checks.
+    translate::CldDataSource::EnableSanityChecksForTest();
+  }
  protected:
   base::ScopedTempDir temp_dir_;
   CldComponentInstallerTraits traits_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(CldComponentInstallerTest);
 };
 
 TEST_F(CldComponentInstallerTest, SetLatestCldDataFile) {
   const base::FilePath expected(FILE_PATH_LITERAL("test/foo.test"));
@@ skipping 55 matching lines @@
   traits_.ComponentReady(version, install_dir, manifest.Pass());
   base::FilePath result =
       CldComponentInstallerTraits::GetLatestCldDataFile();
   ASSERT_TRUE(StartsWith(result.AsUTF16Unsafe(),
                          install_dir.AsUTF16Unsafe(),
                          true));
   ASSERT_TRUE(EndsWith(result.value(), kTestCldDataFileName, true));
 }
 
 }  // namespace component_updater