chrome/browser/conflicts/installed_applications_win_unittest.cc - chromium/src - Git at Google

 // Copyright 2017 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/conflicts/installed_applications_win.h"

 #include <algorithm>
 #include <map>

 #include "base/macros.h"
 #include "base/strings/stringprintf.h"
 #include "base/test/test_reg_util_win.h"
 #include "base/win/registry.h"
 #include "chrome/browser/conflicts/msi_util_win.h"
 #include "testing/gtest/include/gtest/gtest.h"

 namespace {

 static const wchar_t kRegistryKeyPathFormat[] =
     L"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\%ls";

 struct CommonInfo {
   base::string16 product_id;
   bool is_system_component;
   bool is_microsoft_published;
   base::string16 display_name;
   base::string16 uninstall_string;
 };

 struct InstallLocationApplicationInfo {
   CommonInfo common_info;
   base::string16 install_location;
 };

 struct MsiApplicationInfo {
   CommonInfo common_info;
   std::vector<base::string16> components;
 };

 class MockMsiUtil : public MsiUtil {
  public:
   MockMsiUtil(const std::map<base::string16, std::vector<base::string16>>&
                   component_paths_map)
       : component_paths_map_(component_paths_map) {}

   bool GetMsiComponentPaths(
       const base::string16& product_guid,
       const base::string16& user_sid,
       std::vector<base::string16>* component_paths) const override {
     auto iter = component_paths_map_.find(product_guid);
     if (iter == component_paths_map_.end())
       return false;

     *component_paths = iter->second;
     return true;
   }

  private:
   const std::map<base::string16, std::vector<base::string16>>&
       component_paths_map_;
 };

 class TestInstalledApplications : public InstalledApplications {
  public:
   explicit TestInstalledApplications(std::unique_ptr<MsiUtil> msi_util)
       : InstalledApplications(std::move(msi_util)) {}
 };

 class InstalledApplicationsTest : public testing::Test {
  public:
   InstalledApplicationsTest() = default;
   ~InstalledApplicationsTest() override = default;

   // Overrides HKLM and HKCU to prevent real keys from messing with the tests.
   void OverrideRegistry() {
     ASSERT_NO_FATAL_FAILURE(
         registry_override_manager_.OverrideRegistry(HKEY_LOCAL_MACHINE));
     ASSERT_NO_FATAL_FAILURE(
         registry_override_manager_.OverrideRegistry(HKEY_CURRENT_USER));
   }

   void AddCommonInfo(const CommonInfo& common_info,
                      base::win::RegKey* registry_key) {
     registry_key->WriteValue(L"SystemComponent",
                              common_info.is_system_component ? 1 : 0);
     registry_key->WriteValue(L"UninstallString",
                              common_info.uninstall_string.c_str());
     if (common_info.is_microsoft_published)
       registry_key->WriteValue(L"Publisher", L"Microsoft Corporation");
     registry_key->WriteValue(L"DisplayName", common_info.display_name.c_str());
   }

   void AddFakeApplication(const MsiApplicationInfo& application_info) {
     const base::string16 registry_key_path =
         base::StringPrintf(kRegistryKeyPathFormat,
                            application_info.common_info.product_id.c_str());
     base::win::RegKey registry_key(HKEY_CURRENT_USER, registry_key_path.c_str(),
                                    KEY_WRITE);

     AddCommonInfo(application_info.common_info, &registry_key);

     component_paths_map_.insert(
         {application_info.common_info.product_id, application_info.components});
   }

   void AddFakeApplication(
       const InstallLocationApplicationInfo& application_info) {
     const base::string16 registry_key_path =
         base::StringPrintf(kRegistryKeyPathFormat,
                            application_info.common_info.product_id.c_str());
     base::win::RegKey registry_key(HKEY_CURRENT_USER, registry_key_path.c_str(),
                                    KEY_WRITE);

     AddCommonInfo(application_info.common_info, &registry_key);

     registry_key.WriteValue(L"InstallLocation",
                             application_info.install_location.c_str());
   }

   TestInstalledApplications& installed_applications() {
     return *installed_applications_;
   }

   void InitializeInstalledApplications() {
     installed_applications_ = std::make_unique<TestInstalledApplications>(
         std::make_unique<MockMsiUtil>(component_paths_map_));
   }

  private:
   registry_util::RegistryOverrideManager registry_override_manager_;

   std::unique_ptr<TestInstalledApplications> installed_applications_;

   std::map<base::string16, std::vector<base::string16>> component_paths_map_;

   DISALLOW_COPY_AND_ASSIGN(InstalledApplicationsTest);
 };

 }  // namespace

 // Checks that registry entries with invalid information are skipped.
 TEST_F(InstalledApplicationsTest, InvalidEntries) {
   const wchar_t kValidDisplayName[] = L"ADisplayName";
   const wchar_t kValidUninstallString[] = L"c:\\an\\UninstallString.exe";
   const wchar_t kInstallLocation[] = L"c:\\application files\\application\\";

   InstallLocationApplicationInfo kTestCases[] = {
       {
           {
               L"Is SystemComponent", true, false, kValidDisplayName,
               kValidUninstallString,
           },
           kInstallLocation,
       },
       {
           {
               L"Is Microsoft published", false, true, kValidDisplayName,
               kValidUninstallString,
           },
           kInstallLocation,
       },
       {
           {
               L"Missing DisplayName", false, false, L"", kValidUninstallString,
           },
           kInstallLocation,
       },
       {
           {
               L"Missing UninstallString", false, false, kValidDisplayName, L"",
           },
           kInstallLocation,
       },
   };

   ASSERT_NO_FATAL_FAILURE(OverrideRegistry());

   for (const auto& test_case : kTestCases)
     AddFakeApplication(test_case);

   InitializeInstalledApplications();

   // None of the invalid entries were picked up.
   const base::FilePath valid_child_file =
       base::FilePath(kInstallLocation).Append(L"file.dll");
   std::vector<InstalledApplications::ApplicationInfo> applications;
   EXPECT_FALSE(installed_applications().GetInstalledApplications(
       valid_child_file, &applications));
 }

 // Tests InstalledApplications on a valid entry with an InstallLocation.
 TEST_F(InstalledApplicationsTest, InstallLocation) {
   const wchar_t kValidDisplayName[] = L"ADisplayName";
   const wchar_t kValidUninstallString[] = L"c:\\an\\UninstallString.exe";
   const wchar_t kInstallLocation[] = L"c:\\application files\\application\\";

   InstallLocationApplicationInfo kTestCase = {
       {
           L"Completely valid", false, false, kValidDisplayName,
           kValidUninstallString,
       },
       kInstallLocation,
   };

   ASSERT_NO_FATAL_FAILURE(OverrideRegistry());

   AddFakeApplication(kTestCase);

   InitializeInstalledApplications();

   // Child file path.
   const base::FilePath valid_child_file =
       base::FilePath(kInstallLocation).Append(L"file.dll");
   std::vector<InstalledApplications::ApplicationInfo> applications;
   EXPECT_TRUE(installed_applications().GetInstalledApplications(
       valid_child_file, &applications));
   ASSERT_EQ(1u, applications.size());
   EXPECT_EQ(kTestCase.common_info.display_name, applications[0].name);
   EXPECT_EQ(HKEY_CURRENT_USER, applications[0].registry_root);
   EXPECT_FALSE(applications[0].registry_key_path.empty());
   EXPECT_EQ(0u, applications[0].registry_wow64_access);

   // Non-child file path.
   const base::FilePath invalid_child_file(
       L"c:\\application files\\another application\\test.dll");
   EXPECT_FALSE(installed_applications().GetInstalledApplications(
       invalid_child_file, &applications));
 }

 // Tests InstalledApplications on a valid MSI entry.
 TEST_F(InstalledApplicationsTest, Msi) {
   const wchar_t kValidDisplayName[] = L"ADisplayName";
   const wchar_t kValidUninstallString[] = L"c:\\an\\UninstallString.exe";

   MsiApplicationInfo kTestCase = {
       {
           L"Completely valid", false, false, kValidDisplayName,
           kValidUninstallString,
       },
       {
           L"c:\\application files\\application\\file1.dll",
           L"c:\\application files\\application\\file2.dll",
           L"c:\\application files\\application\\sub\\file3.dll",
           L"c:\\windows\\system32\\file4.dll",
       },
   };

   ASSERT_NO_FATAL_FAILURE(OverrideRegistry());

   AddFakeApplication(kTestCase);

   InitializeInstalledApplications();

   // Checks that all the files match the application.
   for (const auto& component : kTestCase.components) {
     std::vector<InstalledApplications::ApplicationInfo> applications;
     EXPECT_TRUE(installed_applications().GetInstalledApplications(
         base::FilePath(component), &applications));
     ASSERT_EQ(1u, applications.size());
     EXPECT_EQ(kTestCase.common_info.display_name, applications[0].name);
     EXPECT_EQ(HKEY_CURRENT_USER, applications[0].registry_root);
     EXPECT_FALSE(applications[0].registry_key_path.empty());
     EXPECT_EQ(0u, applications[0].registry_wow64_access);
   }

   // Any other file shouldn't work.
   const base::FilePath invalid_child_file(
       L"c:\\application files\\another application\\test.dll");
   std::vector<InstalledApplications::ApplicationInfo> applications;
   EXPECT_FALSE(installed_applications().GetInstalledApplications(
       invalid_child_file, &applications));
 }

 // Checks that if a file matches an InstallLocation and an MSI component, only
 // the MSI application will be considered.
 TEST_F(InstalledApplicationsTest, PrioritizeMsi) {
   const wchar_t kValidUninstallString[] = L"c:\\an\\UninstallString.exe";
   const wchar_t kInstallLocationDisplayName[] = L"InstallLocation DisplayName";
   const wchar_t kMsiDisplayName[] = L"Msi DisplayName";
   const wchar_t kInstallLocation[] = L"c:\\application files\\application\\";
   const wchar_t kMsiComponent[] =
       L"c:\\application files\\application\\file.dll";

   InstallLocationApplicationInfo kInstallLocationFakeApplication = {
       {
           L"GUID1", false, false, kInstallLocationDisplayName,
           kValidUninstallString,
       },
       kInstallLocation,
   };

   MsiApplicationInfo kMsiFakeApplication = {
       {
           L"GUID2", false, false, kMsiDisplayName, kValidUninstallString,
       },
       {
           kMsiComponent,
       },
   };

   ASSERT_NO_FATAL_FAILURE(OverrideRegistry());

   AddFakeApplication(kInstallLocationFakeApplication);
   AddFakeApplication(kMsiFakeApplication);

   InitializeInstalledApplications();

   std::vector<InstalledApplications::ApplicationInfo> applications;
   EXPECT_TRUE(installed_applications().GetInstalledApplications(
       base::FilePath(kMsiComponent), &applications));
   ASSERT_EQ(1u, applications.size());
   EXPECT_NE(kInstallLocationDisplayName, applications[0].name);
   EXPECT_EQ(kMsiDisplayName, applications[0].name);
 }

 // Tests that if 2 entries with conflicting InstallLocation exist, both are
 // ignored.
 TEST_F(InstalledApplicationsTest, ConflictingInstallLocations) {
   const wchar_t kValidUninstallString[] = L"c:\\an\\UninstallString.exe";
   const wchar_t kDisplayName1[] = L"DisplayName1";
   const wchar_t kDisplayName2[] = L"DisplayName2";
   const wchar_t kInstallLocationParent[] = L"c:\\application files\\company\\";
   const wchar_t kInstallLocationChild[] =
       L"c:\\application files\\company\\application";
   const wchar_t kFile[] =
       L"c:\\application files\\company\\application\\file.dll";

   InstallLocationApplicationInfo kFakeApplication1 = {
       {
           L"GUID1", false, false, kDisplayName1, kValidUninstallString,
       },
       kInstallLocationParent,
   };
   InstallLocationApplicationInfo kFakeApplication2 = {
       {
           L"GUID2", false, false, kDisplayName2, kValidUninstallString,
       },
       kInstallLocationChild,
   };

   ASSERT_NO_FATAL_FAILURE(OverrideRegistry());

   AddFakeApplication(kFakeApplication1);
   AddFakeApplication(kFakeApplication2);

   InitializeInstalledApplications();

   std::vector<InstalledApplications::ApplicationInfo> applications;
   EXPECT_FALSE(installed_applications().GetInstalledApplications(
       base::FilePath(kFile), &applications));
 }

 // This test ensures that each uninstall registry key is only read once, and
 // thus no applications are picked up twice.
 // This is possible if the same registry key is requested for both the 32-bit
 // and 64-bit view but either that key is shared between the views, or the host
 // OS is 32-bit, and there is no 64-bit view.
 TEST_F(InstalledApplicationsTest, NoDuplicates) {
   InitializeInstalledApplications();

   auto applications = installed_applications().applications_;
   std::sort(std::begin(applications), std::end(applications));
   EXPECT_EQ(std::end(applications),
             std::adjacent_find(std::begin(applications), std::end(applications),
                                [](const auto& lhs, const auto& rhs) {
                                  return std::tie(lhs.name, lhs.registry_root,
                                                  lhs.registry_key_path,
                                                  lhs.registry_wow64_access) ==
                                         std::tie(rhs.name, rhs.registry_root,
                                                  rhs.registry_key_path,
                                                  rhs.registry_wow64_access);
                                }));
 }
	// Copyright 2017 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/conflicts/installed_applications_win.h"

	#include <algorithm>
	#include <map>

	#include "base/macros.h"
	#include "base/strings/stringprintf.h"
	#include "base/test/test_reg_util_win.h"
	#include "base/win/registry.h"
	#include "chrome/browser/conflicts/msi_util_win.h"
	#include "testing/gtest/include/gtest/gtest.h"

	namespace {

	static const wchar_t kRegistryKeyPathFormat[] =
	L"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\%ls";

	struct CommonInfo {
	base::string16 product_id;
	bool is_system_component;
	bool is_microsoft_published;
	base::string16 display_name;
	base::string16 uninstall_string;
	};

	struct InstallLocationApplicationInfo {
	CommonInfo common_info;
	base::string16 install_location;
	};

	struct MsiApplicationInfo {
	CommonInfo common_info;
	std::vector<base::string16> components;
	};

	class MockMsiUtil : public MsiUtil {
	public:
	MockMsiUtil(const std::map<base::string16, std::vector<base::string16>>&
	component_paths_map)
	: component_paths_map_(component_paths_map) {}

	bool GetMsiComponentPaths(
	const base::string16& product_guid,
	const base::string16& user_sid,
	std::vector<base::string16>* component_paths) const override {
	auto iter = component_paths_map_.find(product_guid);
	if (iter == component_paths_map_.end())
	return false;

	*component_paths = iter->second;
	return true;
	}

	private:
	const std::map<base::string16, std::vector<base::string16>>&
	component_paths_map_;
	};

	class TestInstalledApplications : public InstalledApplications {
	public:
	explicit TestInstalledApplications(std::unique_ptr<MsiUtil> msi_util)
	: InstalledApplications(std::move(msi_util)) {}
	};

	class InstalledApplicationsTest : public testing::Test {
	public:
	InstalledApplicationsTest() = default;
	~InstalledApplicationsTest() override = default;

	// Overrides HKLM and HKCU to prevent real keys from messing with the tests.
	void OverrideRegistry() {
	ASSERT_NO_FATAL_FAILURE(
	registry_override_manager_.OverrideRegistry(HKEY_LOCAL_MACHINE));
	ASSERT_NO_FATAL_FAILURE(
	registry_override_manager_.OverrideRegistry(HKEY_CURRENT_USER));
	}

	void AddCommonInfo(const CommonInfo& common_info,
	base::win::RegKey* registry_key) {
	registry_key->WriteValue(L"SystemComponent",
	common_info.is_system_component ? 1 : 0);
	registry_key->WriteValue(L"UninstallString",
	common_info.uninstall_string.c_str());
	if (common_info.is_microsoft_published)
	registry_key->WriteValue(L"Publisher", L"Microsoft Corporation");
	registry_key->WriteValue(L"DisplayName", common_info.display_name.c_str());
	}

	void AddFakeApplication(const MsiApplicationInfo& application_info) {
	const base::string16 registry_key_path =
	base::StringPrintf(kRegistryKeyPathFormat,
	application_info.common_info.product_id.c_str());
	base::win::RegKey registry_key(HKEY_CURRENT_USER, registry_key_path.c_str(),
	KEY_WRITE);

	AddCommonInfo(application_info.common_info, &registry_key);

	component_paths_map_.insert(
	{application_info.common_info.product_id, application_info.components});
	}

	void AddFakeApplication(
	const InstallLocationApplicationInfo& application_info) {
	const base::string16 registry_key_path =
	base::StringPrintf(kRegistryKeyPathFormat,
	application_info.common_info.product_id.c_str());
	base::win::RegKey registry_key(HKEY_CURRENT_USER, registry_key_path.c_str(),
	KEY_WRITE);

	AddCommonInfo(application_info.common_info, &registry_key);

	registry_key.WriteValue(L"InstallLocation",
	application_info.install_location.c_str());
	}

	TestInstalledApplications& installed_applications() {
	return *installed_applications_;
	}

	void InitializeInstalledApplications() {
	installed_applications_ = std::make_unique<TestInstalledApplications>(
	std::make_unique<MockMsiUtil>(component_paths_map_));
	}

	private:
	registry_util::RegistryOverrideManager registry_override_manager_;

	std::unique_ptr<TestInstalledApplications> installed_applications_;

	std::map<base::string16, std::vector<base::string16>> component_paths_map_;

	DISALLOW_COPY_AND_ASSIGN(InstalledApplicationsTest);
	};

	} // namespace

	// Checks that registry entries with invalid information are skipped.
	TEST_F(InstalledApplicationsTest, InvalidEntries) {
	const wchar_t kValidDisplayName[] = L"ADisplayName";
	const wchar_t kValidUninstallString[] = L"c:\\an\\UninstallString.exe";
	const wchar_t kInstallLocation[] = L"c:\\application files\\application\\";

	InstallLocationApplicationInfo kTestCases[] = {
	{
	{
	L"Is SystemComponent", true, false, kValidDisplayName,
	kValidUninstallString,
	},
	kInstallLocation,
	},
	{
	{
	L"Is Microsoft published", false, true, kValidDisplayName,
	kValidUninstallString,
	},
	kInstallLocation,
	},
	{
	{
	L"Missing DisplayName", false, false, L"", kValidUninstallString,
	},
	kInstallLocation,
	},
	{
	{
	L"Missing UninstallString", false, false, kValidDisplayName, L"",
	},
	kInstallLocation,
	},
	};

	ASSERT_NO_FATAL_FAILURE(OverrideRegistry());

	for (const auto& test_case : kTestCases)
	AddFakeApplication(test_case);

	InitializeInstalledApplications();

	// None of the invalid entries were picked up.
	const base::FilePath valid_child_file =
	base::FilePath(kInstallLocation).Append(L"file.dll");
	std::vector<InstalledApplications::ApplicationInfo> applications;
	EXPECT_FALSE(installed_applications().GetInstalledApplications(
	valid_child_file, &applications));
	}

	// Tests InstalledApplications on a valid entry with an InstallLocation.
	TEST_F(InstalledApplicationsTest, InstallLocation) {
	const wchar_t kValidDisplayName[] = L"ADisplayName";
	const wchar_t kValidUninstallString[] = L"c:\\an\\UninstallString.exe";
	const wchar_t kInstallLocation[] = L"c:\\application files\\application\\";

	InstallLocationApplicationInfo kTestCase = {
	{
	L"Completely valid", false, false, kValidDisplayName,
	kValidUninstallString,
	},
	kInstallLocation,
	};

	ASSERT_NO_FATAL_FAILURE(OverrideRegistry());

	AddFakeApplication(kTestCase);

	InitializeInstalledApplications();

	// Child file path.
	const base::FilePath valid_child_file =
	base::FilePath(kInstallLocation).Append(L"file.dll");
	std::vector<InstalledApplications::ApplicationInfo> applications;
	EXPECT_TRUE(installed_applications().GetInstalledApplications(
	valid_child_file, &applications));
	ASSERT_EQ(1u, applications.size());
	EXPECT_EQ(kTestCase.common_info.display_name, applications[0].name);
	EXPECT_EQ(HKEY_CURRENT_USER, applications[0].registry_root);
	EXPECT_FALSE(applications[0].registry_key_path.empty());
	EXPECT_EQ(0u, applications[0].registry_wow64_access);

	// Non-child file path.
	const base::FilePath invalid_child_file(
	L"c:\\application files\\another application\\test.dll");
	EXPECT_FALSE(installed_applications().GetInstalledApplications(
	invalid_child_file, &applications));
	}

	// Tests InstalledApplications on a valid MSI entry.
	TEST_F(InstalledApplicationsTest, Msi) {
	const wchar_t kValidDisplayName[] = L"ADisplayName";
	const wchar_t kValidUninstallString[] = L"c:\\an\\UninstallString.exe";

	MsiApplicationInfo kTestCase = {
	{
	L"Completely valid", false, false, kValidDisplayName,
	kValidUninstallString,
	},
	{
	L"c:\\application files\\application\\file1.dll",
	L"c:\\application files\\application\\file2.dll",
	L"c:\\application files\\application\\sub\\file3.dll",
	L"c:\\windows\\system32\\file4.dll",
	},
	};

	ASSERT_NO_FATAL_FAILURE(OverrideRegistry());

	AddFakeApplication(kTestCase);

	InitializeInstalledApplications();

	// Checks that all the files match the application.
	for (const auto& component : kTestCase.components) {
	std::vector<InstalledApplications::ApplicationInfo> applications;
	EXPECT_TRUE(installed_applications().GetInstalledApplications(
	base::FilePath(component), &applications));
	ASSERT_EQ(1u, applications.size());
	EXPECT_EQ(kTestCase.common_info.display_name, applications[0].name);
	EXPECT_EQ(HKEY_CURRENT_USER, applications[0].registry_root);
	EXPECT_FALSE(applications[0].registry_key_path.empty());
	EXPECT_EQ(0u, applications[0].registry_wow64_access);
	}

	// Any other file shouldn't work.
	const base::FilePath invalid_child_file(
	L"c:\\application files\\another application\\test.dll");
	std::vector<InstalledApplications::ApplicationInfo> applications;
	EXPECT_FALSE(installed_applications().GetInstalledApplications(
	invalid_child_file, &applications));
	}

	// Checks that if a file matches an InstallLocation and an MSI component, only
	// the MSI application will be considered.
	TEST_F(InstalledApplicationsTest, PrioritizeMsi) {
	const wchar_t kValidUninstallString[] = L"c:\\an\\UninstallString.exe";
	const wchar_t kInstallLocationDisplayName[] = L"InstallLocation DisplayName";
	const wchar_t kMsiDisplayName[] = L"Msi DisplayName";
	const wchar_t kInstallLocation[] = L"c:\\application files\\application\\";
	const wchar_t kMsiComponent[] =
	L"c:\\application files\\application\\file.dll";

	InstallLocationApplicationInfo kInstallLocationFakeApplication = {
	{
	L"GUID1", false, false, kInstallLocationDisplayName,
	kValidUninstallString,
	},
	kInstallLocation,
	};

	MsiApplicationInfo kMsiFakeApplication = {
	{
	L"GUID2", false, false, kMsiDisplayName, kValidUninstallString,
	},
	{
	kMsiComponent,
	},
	};

	ASSERT_NO_FATAL_FAILURE(OverrideRegistry());

	AddFakeApplication(kInstallLocationFakeApplication);
	AddFakeApplication(kMsiFakeApplication);

	InitializeInstalledApplications();

	std::vector<InstalledApplications::ApplicationInfo> applications;
	EXPECT_TRUE(installed_applications().GetInstalledApplications(
	base::FilePath(kMsiComponent), &applications));
	ASSERT_EQ(1u, applications.size());
	EXPECT_NE(kInstallLocationDisplayName, applications[0].name);
	EXPECT_EQ(kMsiDisplayName, applications[0].name);
	}

	// Tests that if 2 entries with conflicting InstallLocation exist, both are
	// ignored.
	TEST_F(InstalledApplicationsTest, ConflictingInstallLocations) {
	const wchar_t kValidUninstallString[] = L"c:\\an\\UninstallString.exe";
	const wchar_t kDisplayName1[] = L"DisplayName1";
	const wchar_t kDisplayName2[] = L"DisplayName2";
	const wchar_t kInstallLocationParent[] = L"c:\\application files\\company\\";
	const wchar_t kInstallLocationChild[] =
	L"c:\\application files\\company\\application";
	const wchar_t kFile[] =
	L"c:\\application files\\company\\application\\file.dll";

	InstallLocationApplicationInfo kFakeApplication1 = {
	{
	L"GUID1", false, false, kDisplayName1, kValidUninstallString,
	},
	kInstallLocationParent,
	};
	InstallLocationApplicationInfo kFakeApplication2 = {
	{
	L"GUID2", false, false, kDisplayName2, kValidUninstallString,
	},
	kInstallLocationChild,
	};

	ASSERT_NO_FATAL_FAILURE(OverrideRegistry());

	AddFakeApplication(kFakeApplication1);
	AddFakeApplication(kFakeApplication2);

	InitializeInstalledApplications();

	std::vector<InstalledApplications::ApplicationInfo> applications;
	EXPECT_FALSE(installed_applications().GetInstalledApplications(
	base::FilePath(kFile), &applications));
	}

	// This test ensures that each uninstall registry key is only read once, and
	// thus no applications are picked up twice.
	// This is possible if the same registry key is requested for both the 32-bit
	// and 64-bit view but either that key is shared between the views, or the host
	// OS is 32-bit, and there is no 64-bit view.
	TEST_F(InstalledApplicationsTest, NoDuplicates) {
	InitializeInstalledApplications();

	auto applications = installed_applications().applications_;
	std::sort(std::begin(applications), std::end(applications));
	EXPECT_EQ(std::end(applications),
	std::adjacent_find(std::begin(applications), std::end(applications),
	[](const auto& lhs, const auto& rhs) {
	return std::tie(lhs.name, lhs.registry_root,
	lhs.registry_key_path,
	lhs.registry_wow64_access) ==
	std::tie(rhs.name, rhs.registry_root,
	rhs.registry_key_path,
	rhs.registry_wow64_access);
	}));
	}