proxy_config_service_linux_unittest.cc

// Copyright (c) 2012 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 "net/proxy/proxy_config_service_linux.h"

#include <map>
#include <string>
#include <vector>

#include "base/bind.h"
#include "base/compiler_specific.h"
#include "base/file_util.h"
#include "base/files/file_path.h"
#include "base/format_macros.h"
#include "base/logging.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/synchronization/waitable_event.h"
#include "base/threading/thread.h"
#include "net/proxy/proxy_config.h"
#include "net/proxy/proxy_config_service_common_unittest.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "testing/platform_test.h"

namespace net {
namespace {

// Set of values for all environment variables that we might
// query. NULL represents an unset variable.
struct EnvVarValues {
  // The strange capitalization is so that the field matches the
  // environment variable name exactly.
  const char *DESKTOP_SESSION, *HOME,
      *KDEHOME, *KDE_SESSION_VERSION,
      *auto_proxy, *all_proxy,
      *http_proxy, *https_proxy, *ftp_proxy,
      *SOCKS_SERVER, *SOCKS_VERSION,
      *no_proxy;
};

// Undo macro pollution from GDK includes (from message_loop.h).
#undef TRUE
#undef FALSE

// So as to distinguish between an unset gconf boolean variable and
// one that is false.
enum BoolSettingValue {
  UNSET = 0, TRUE, FALSE
};

// Set of values for all gconf settings that we might query.
struct GConfValues {
  // strings
  const char *mode, *autoconfig_url,
      *http_host, *secure_host, *ftp_host, *socks_host;
  // integers
  int http_port, secure_port, ftp_port, socks_port;
  // booleans
  BoolSettingValue use_proxy, same_proxy, use_auth;
  // string list
  std::vector<std::string> ignore_hosts;
};

// Mapping from a setting name to the location of the corresponding
// value (inside a EnvVarValues or GConfValues struct).
template<typename key_type, typename value_type>
struct SettingsTable {
  typedef std::map<key_type, value_type*> map_type;

  // Gets the value from its location
  value_type Get(key_type key) {
    typename map_type::const_iterator it = settings.find(key);
    // In case there's a typo or the unittest becomes out of sync.
    CHECK(it != settings.end()) << "key " << key << " not found";
    value_type* value_ptr = it->second;
    return *value_ptr;
  }

  map_type settings;
};

class MockEnvironment : public base::Environment {
 public:
  MockEnvironment() {
#define ENTRY(x) table[#x] = &values.x
    ENTRY(DESKTOP_SESSION);
    ENTRY(HOME);
    ENTRY(KDEHOME);
    ENTRY(KDE_SESSION_VERSION);
    ENTRY(auto_proxy);
    ENTRY(all_proxy);
    ENTRY(http_proxy);
    ENTRY(https_proxy);
    ENTRY(ftp_proxy);
    ENTRY(no_proxy);
    ENTRY(SOCKS_SERVER);
    ENTRY(SOCKS_VERSION);
#undef ENTRY
    Reset();
  }

  // Zeroes all environment values.
  void Reset() {
    EnvVarValues zero_values = { 0 };
    values = zero_values;
  }

  // Begin base::Environment implementation.
  virtual bool GetVar(const char* variable_name, std::string* result) OVERRIDE {
    std::map<std::string, const char**>::iterator it =
        table.find(variable_name);
    if (it != table.end() && *(it->second) != NULL) {
      // Note that the variable may be defined but empty.
      *result = *(it->second);
      return true;
    }
    return false;
  }

  virtual bool SetVar(const char* variable_name, const std::string& new_value)
      OVERRIDE {
    ADD_FAILURE();
    return false;
  }

  virtual bool UnSetVar(const char* variable_name) OVERRIDE {
    ADD_FAILURE();
    return false;
  }
  // End base::Environment implementation.

  // Intentionally public, for convenience when setting up a test.
  EnvVarValues values;

 private:
  std::map<std::string, const char**> table;
};

class MockSettingGetter
    : public ProxyConfigServiceLinux::SettingGetter {
 public:
  typedef ProxyConfigServiceLinux::SettingGetter SettingGetter;
  MockSettingGetter() {
#define ENTRY(key, field) \
      strings_table.settings[SettingGetter::key] = &values.field
    ENTRY(PROXY_MODE, mode);
    ENTRY(PROXY_AUTOCONF_URL, autoconfig_url);
    ENTRY(PROXY_HTTP_HOST, http_host);
    ENTRY(PROXY_HTTPS_HOST, secure_host);
    ENTRY(PROXY_FTP_HOST, ftp_host);
    ENTRY(PROXY_SOCKS_HOST, socks_host);
#undef ENTRY
#define ENTRY(key, field) \
      ints_table.settings[SettingGetter::key] = &values.field
    ENTRY(PROXY_HTTP_PORT, http_port);
    ENTRY(PROXY_HTTPS_PORT, secure_port);
    ENTRY(PROXY_FTP_PORT, ftp_port);
    ENTRY(PROXY_SOCKS_PORT, socks_port);
#undef ENTRY
#define ENTRY(key, field) \
      bools_table.settings[SettingGetter::key] = &values.field
    ENTRY(PROXY_USE_HTTP_PROXY, use_proxy);
    ENTRY(PROXY_USE_SAME_PROXY, same_proxy);
    ENTRY(PROXY_USE_AUTHENTICATION, use_auth);
#undef ENTRY
    string_lists_table.settings[SettingGetter::PROXY_IGNORE_HOSTS] =
        &values.ignore_hosts;
    Reset();
  }

  // Zeros all environment values.
  void Reset() {
    GConfValues zero_values = { 0 };
    values = zero_values;
  }

  virtual bool Init(base::SingleThreadTaskRunner* glib_thread_task_runner,
                    base::MessageLoopForIO* file_loop) OVERRIDE {
    return true;
  }

  virtual void ShutDown() OVERRIDE {}

  virtual bool SetUpNotifications(ProxyConfigServiceLinux::Delegate* delegate)
      OVERRIDE {
    return true;
  }

  virtual base::SingleThreadTaskRunner* GetNotificationTaskRunner() OVERRIDE {
    return NULL;
  }

  virtual ProxyConfigSource GetConfigSource() OVERRIDE {
    return PROXY_CONFIG_SOURCE_TEST;
  }

  virtual bool GetString(StringSetting key, std::string* result) OVERRIDE {
    const char* value = strings_table.Get(key);
    if (value) {
      *result = value;
      return true;
    }
    return false;
  }

  virtual bool GetBool(BoolSetting key, bool* result) OVERRIDE {
    BoolSettingValue value = bools_table.Get(key);
    switch (value) {
    case UNSET:
      return false;
    case TRUE:
      *result = true;
      break;
    case FALSE:
      *result = false;
    }
    return true;
  }

  virtual bool GetInt(IntSetting key, int* result) OVERRIDE {
    // We don't bother to distinguish unset keys from 0 values.
    *result = ints_table.Get(key);
    return true;
  }

  virtual bool GetStringList(StringListSetting key,
                             std::vector<std::string>* result) OVERRIDE {
    *result = string_lists_table.Get(key);
    // We don't bother to distinguish unset keys from empty lists.
    return !result->empty();
  }

  virtual bool BypassListIsReversed() OVERRIDE {
    return false;
  }

  virtual bool MatchHostsUsingSuffixMatching() OVERRIDE {
    return false;
  }

  // Intentionally public, for convenience when setting up a test.
  GConfValues values;

 private:
  SettingsTable<StringSetting, const char*> strings_table;
  SettingsTable<BoolSetting, BoolSettingValue> bools_table;
  SettingsTable<IntSetting, int> ints_table;
  SettingsTable<StringListSetting,
                std::vector<std::string> > string_lists_table;
};

}  // namespace
}  // namespace net

// This helper class runs ProxyConfigServiceLinux::GetLatestProxyConfig() on
// the IO thread and synchronously waits for the result.
// Some code duplicated from proxy_script_fetcher_unittest.cc.
class SynchConfigGetter {
 public:
  // Takes ownership of |config_service|.
  explicit SynchConfigGetter(net::ProxyConfigServiceLinux* config_service)
      : event_(false, false),
        io_thread_("IO_Thread"),
        config_service_(config_service) {
    // Start an IO thread.
    base::Thread::Options options;
    options.message_loop_type = base::MessageLoop::TYPE_IO;
    io_thread_.StartWithOptions(options);

    // Make sure the thread started.
    io_thread_.message_loop()->PostTask(FROM_HERE,
        base::Bind(&SynchConfigGetter::Init, base::Unretained(this)));
    Wait();
  }

  ~SynchConfigGetter() {
    // Let the config service post a destroy message to the IO thread
    // before cleaning up that thread.
    delete config_service_;
    // Clean up the IO thread.
    io_thread_.message_loop()->PostTask(FROM_HERE,
        base::Bind(&SynchConfigGetter::CleanUp, base::Unretained(this)));
    Wait();
  }

  // Does gconf setup and initial fetch of the proxy config,
  // all on the calling thread (meant to be the thread with the
  // default glib main loop, which is the UI thread).
  void SetupAndInitialFetch() {
    base::MessageLoop* file_loop = io_thread_.message_loop();
    DCHECK_EQ(base::MessageLoop::TYPE_IO, file_loop->type());
    // We pass the mock IO thread as both the IO and file threads.
    config_service_->SetupAndFetchInitialConfig(
        base::MessageLoopProxy::current().get(),
        io_thread_.message_loop_proxy().get(),
        static_cast<base::MessageLoopForIO*>(file_loop));
  }
  // Synchronously gets the proxy config.
  net::ProxyConfigService::ConfigAvailability SyncGetLatestProxyConfig(
      net::ProxyConfig* config) {
    io_thread_.message_loop()->PostTask(FROM_HERE,
        base::Bind(&SynchConfigGetter::GetLatestConfigOnIOThread,
                   base::Unretained(this)));
    Wait();
    *config = proxy_config_;
    return get_latest_config_result_;
  }

 private:
  // [Runs on |io_thread_|]
  void Init() {
    event_.Signal();
  }

  // Calls GetLatestProxyConfig, running on |io_thread_| Signals |event_|
  // on completion.
  void GetLatestConfigOnIOThread() {
    get_latest_config_result_ =
        config_service_->GetLatestProxyConfig(&proxy_config_);
    event_.Signal();
  }

  // [Runs on |io_thread_|] Signals |event_| on cleanup completion.
  void CleanUp() {
    base::MessageLoop::current()->RunUntilIdle();
    event_.Signal();
  }

  void Wait() {
    event_.Wait();
    event_.Reset();
  }

  base::WaitableEvent event_;
  base::Thread io_thread_;

  net::ProxyConfigServiceLinux* config_service_;

  // The config obtained by |io_thread_| and read back by the main
  // thread.
  net::ProxyConfig proxy_config_;

  // Return value from GetLatestProxyConfig().
  net::ProxyConfigService::ConfigAvailability get_latest_config_result_;
};

namespace net {

// This test fixture is only really needed for the KDEConfigParser test case,
// but all the test cases with the same prefix ("ProxyConfigServiceLinuxTest")
// must use the same test fixture class (also "ProxyConfigServiceLinuxTest").
class ProxyConfigServiceLinuxTest : public PlatformTest {
 protected:
  virtual void SetUp() OVERRIDE {
    PlatformTest::SetUp();
    // Set up a temporary KDE home directory.
    std::string prefix("ProxyConfigServiceLinuxTest_user_home");
    base::CreateNewTempDirectory(prefix, &user_home_);
    kde_home_ = user_home_.Append(FILE_PATH_LITERAL(".kde"));
    base::FilePath path = kde_home_.Append(FILE_PATH_LITERAL("share"));
    path = path.Append(FILE_PATH_LITERAL("config"));
    base::CreateDirectory(path);
    kioslaverc_ = path.Append(FILE_PATH_LITERAL("kioslaverc"));
    // Set up paths but do not create the directory for .kde4.
    kde4_home_ = user_home_.Append(FILE_PATH_LITERAL(".kde4"));
    path = kde4_home_.Append(FILE_PATH_LITERAL("share"));
    kde4_config_ = path.Append(FILE_PATH_LITERAL("config"));
    kioslaverc4_ = kde4_config_.Append(FILE_PATH_LITERAL("kioslaverc"));
  }

  virtual void TearDown() OVERRIDE {
    // Delete the temporary KDE home directory.
    base::DeleteFile(user_home_, true);
    PlatformTest::TearDown();
  }

  base::FilePath user_home_;
  // KDE3 paths.
  base::FilePath kde_home_;
  base::FilePath kioslaverc_;
  // KDE4 paths.
  base::FilePath kde4_home_;
  base::FilePath kde4_config_;
  base::FilePath kioslaverc4_;
};

// Builds an identifier for each test in an array.
#define TEST_DESC(desc) base::StringPrintf("at line %d <%s>", __LINE__, desc)

TEST_F(ProxyConfigServiceLinuxTest, BasicGConfTest) {
  std::vector<std::string> empty_ignores;

  std::vector<std::string> google_ignores;
  google_ignores.push_back("*.google.com");

  // Inspired from proxy_config_service_win_unittest.cc.
  // Very neat, but harder to track down failures though.
  const struct {
    // Short description to identify the test
    std::string description;

    // Input.
    GConfValues values;

    // Expected outputs (availability and fields of ProxyConfig).
    ProxyConfigService::ConfigAvailability availability;
    bool auto_detect;
    GURL pac_url;
    ProxyRulesExpectation proxy_rules;
  } tests[] = {
    {
      TEST_DESC("No proxying"),
      { // Input.
        "none",                   // mode
        "",                       // autoconfig_url
        "", "", "", "",           // hosts
        0, 0, 0, 0,               // ports
        FALSE, FALSE, FALSE,      // use, same, auth
        empty_ignores,            // ignore_hosts
      },

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                      // auto_detect
      GURL(),                     // pac_url
      ProxyRulesExpectation::Empty(),
    },

    {
      TEST_DESC("Auto detect"),
      { // Input.
        "auto",                   // mode
        "",                       // autoconfig_url
        "", "", "", "",           // hosts
        0, 0, 0, 0,               // ports
        FALSE, FALSE, FALSE,      // use, same, auth
        empty_ignores,            // ignore_hosts
      },

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      true,                       // auto_detect
      GURL(),                     // pac_url
      ProxyRulesExpectation::Empty(),
    },

    {
      TEST_DESC("Valid PAC URL"),
      { // Input.
        "auto",                      // mode
        "http://wpad/wpad.dat",      // autoconfig_url
        "", "", "", "",              // hosts
        0, 0, 0, 0,                  // ports
        FALSE, FALSE, FALSE,         // use, same, auth
        empty_ignores,               // ignore_hosts
      },

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                         // auto_detect
      GURL("http://wpad/wpad.dat"),  // pac_url
      ProxyRulesExpectation::Empty(),
    },

    {
      TEST_DESC("Invalid PAC URL"),
      { // Input.
        "auto",                      // mode
        "wpad.dat",                  // autoconfig_url
        "", "", "", "",              // hosts
        0, 0, 0, 0,                  // ports
        FALSE, FALSE, FALSE,         // use, same, auth
        empty_ignores,               // ignore_hosts
      },

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                          // auto_detect
      GURL(),                        // pac_url
      ProxyRulesExpectation::Empty(),
    },

    {
      TEST_DESC("Single-host in proxy list"),
      { // Input.
        "manual",                              // mode
        "",                                    // autoconfig_url
        "www.google.com", "", "", "",          // hosts
        80, 0, 0, 0,                           // ports
        TRUE, TRUE, FALSE,                     // use, same, auth
        empty_ignores,                         // ignore_hosts
      },

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                   // auto_detect
      GURL(),                                  // pac_url
      ProxyRulesExpectation::Single(
          "www.google.com:80",  // single proxy
          ""),                  // bypass rules
    },

    {
      TEST_DESC("use_http_proxy is honored"),
      { // Input.
        "manual",                              // mode
        "",                                    // autoconfig_url
        "www.google.com", "", "", "",          // hosts
        80, 0, 0, 0,                           // ports
        FALSE, TRUE, FALSE,                    // use, same, auth
        empty_ignores,                         // ignore_hosts
      },

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                   // auto_detect
      GURL(),                                  // pac_url
      ProxyRulesExpectation::Empty(),
    },

    {
      TEST_DESC("use_http_proxy and use_same_proxy are optional"),
      { // Input.
        "manual",                                     // mode
        "",                                           // autoconfig_url
        "www.google.com", "", "", "",                 // hosts
        80, 0, 0, 0,                                  // ports
        UNSET, UNSET, FALSE,                          // use, same, auth
        empty_ignores,                                // ignore_hosts
      },

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                          // auto_detect
      GURL(),                                         // pac_url
      ProxyRulesExpectation::PerScheme(
          "www.google.com:80",  // http
          "",                   // https
          "",                   // ftp
          ""),                  // bypass rules
    },

    {
      TEST_DESC("Single-host, different port"),
      { // Input.
        "manual",                                     // mode
        "",                                           // autoconfig_url
        "www.google.com", "", "", "",                 // hosts
        88, 0, 0, 0,                                  // ports
        TRUE, TRUE, FALSE,                            // use, same, auth
        empty_ignores,                                // ignore_hosts
      },

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                          // auto_detect
      GURL(),                                         // pac_url
      ProxyRulesExpectation::Single(
          "www.google.com:88",  // single proxy
          ""),                  // bypass rules
    },

    {
      TEST_DESC("Per-scheme proxy rules"),
      { // Input.
        "manual",                                     // mode
        "",                                           // autoconfig_url
        "www.google.com",                             // http_host
        "www.foo.com",                                // secure_host
        "ftp.foo.com",                                // ftp
        "",                                           // socks
        88, 110, 121, 0,                              // ports
        TRUE, FALSE, FALSE,                           // use, same, auth
        empty_ignores,                                // ignore_hosts
      },

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                          // auto_detect
      GURL(),                                         // pac_url
      ProxyRulesExpectation::PerScheme(
          "www.google.com:88",  // http
          "www.foo.com:110",    // https
          "ftp.foo.com:121",    // ftp
          ""),                  // bypass rules
    },

    {
      TEST_DESC("socks"),
      { // Input.
        "manual",                                     // mode
        "",                                           // autoconfig_url
        "", "", "", "socks.com",                      // hosts
        0, 0, 0, 99,                                  // ports
        TRUE, FALSE, FALSE,                           // use, same, auth
        empty_ignores,                                // ignore_hosts
      },

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                          // auto_detect
      GURL(),                                         // pac_url
      ProxyRulesExpectation::Single(
          "socks5://socks.com:99",  // single proxy
          "")                       // bypass rules
    },

    {
      TEST_DESC("Per-scheme proxy rules with fallback to SOCKS"),
      { // Input.
        "manual",                                     // mode
        "",                                           // autoconfig_url
        "www.google.com",                             // http_host
        "www.foo.com",                                // secure_host
        "ftp.foo.com",                                // ftp
        "foobar.net",                                 // socks
        88, 110, 121, 99,                             // ports
        TRUE, FALSE, FALSE,                           // use, same, auth
        empty_ignores,                                // ignore_hosts
      },

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                          // auto_detect
      GURL(),                                         // pac_url
      ProxyRulesExpectation::PerSchemeWithSocks(
          "www.google.com:88",      // http
          "www.foo.com:110",        // https
          "ftp.foo.com:121",        // ftp
          "socks5://foobar.net:99", // socks
          ""),                      // bypass rules
    },

    {
      TEST_DESC("Per-scheme proxy rules (just HTTP) with fallback to SOCKS"),
      { // Input.
        "manual",                                     // mode
        "",                                           // autoconfig_url
        "www.google.com",                             // http_host
        "",                                           // secure_host
        "",                                           // ftp
        "foobar.net",                                 // socks
        88, 0, 0, 99,                                 // ports
        TRUE, FALSE, FALSE,                           // use, same, auth
        empty_ignores,                                // ignore_hosts
      },

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                          // auto_detect
      GURL(),                                         // pac_url
      ProxyRulesExpectation::PerSchemeWithSocks(
          "www.google.com:88",      // http
          "",                       // https
          "",                       // ftp
          "socks5://foobar.net:99", // socks
          ""),                      // bypass rules
    },

    {
      TEST_DESC("Bypass *.google.com"),
      { // Input.
        "manual",                                     // mode
        "",                                           // autoconfig_url
        "www.google.com", "", "", "",                 // hosts
        80, 0, 0, 0,                                  // ports
        TRUE, TRUE, FALSE,                            // use, same, auth
        google_ignores,                               // ignore_hosts
      },

      ProxyConfigService::CONFIG_VALID,
      false,                                          // auto_detect
      GURL(),                                         // pac_url
      ProxyRulesExpectation::Single(
          "www.google.com:80",   // single proxy
          "*.google.com"),       // bypass rules
    },
  };

  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(tests); ++i) {
    SCOPED_TRACE(base::StringPrintf("Test[%" PRIuS "] %s", i,
                                    tests[i].description.c_str()));
    MockEnvironment* env = new MockEnvironment;
    MockSettingGetter* setting_getter = new MockSettingGetter;
    SynchConfigGetter sync_config_getter(
        new ProxyConfigServiceLinux(env, setting_getter));
    ProxyConfig config;
    setting_getter->values = tests[i].values;
    sync_config_getter.SetupAndInitialFetch();
    ProxyConfigService::ConfigAvailability availability =
        sync_config_getter.SyncGetLatestProxyConfig(&config);
    EXPECT_EQ(tests[i].availability, availability);

    if (availability == ProxyConfigService::CONFIG_VALID) {
      EXPECT_EQ(tests[i].auto_detect, config.auto_detect());
      EXPECT_EQ(tests[i].pac_url, config.pac_url());
      EXPECT_TRUE(tests[i].proxy_rules.Matches(config.proxy_rules()));
    }
  }
}

TEST_F(ProxyConfigServiceLinuxTest, BasicEnvTest) {
  // Inspired from proxy_config_service_win_unittest.cc.
  const struct {
    // Short description to identify the test
    std::string description;

    // Input.
    EnvVarValues values;

    // Expected outputs (availability and fields of ProxyConfig).
    ProxyConfigService::ConfigAvailability availability;
    bool auto_detect;
    GURL pac_url;
    ProxyRulesExpectation proxy_rules;
  } tests[] = {
    {
      TEST_DESC("No proxying"),
      { // Input.
        NULL,  // DESKTOP_SESSION
        NULL,  // HOME
        NULL,  // KDEHOME
        NULL,  // KDE_SESSION_VERSION
        NULL,  // auto_proxy
        NULL,  // all_proxy
        NULL, NULL, NULL,  // per-proto proxies
        NULL, NULL,  // SOCKS
        "*",  // no_proxy
      },

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                      // auto_detect
      GURL(),                     // pac_url
      ProxyRulesExpectation::Empty(),
    },

    {
      TEST_DESC("Auto detect"),
      { // Input.
        NULL,  // DESKTOP_SESSION
        NULL,  // HOME
        NULL,  // KDEHOME
        NULL,  // KDE_SESSION_VERSION
        "",    // auto_proxy
        NULL,  // all_proxy
        NULL, NULL, NULL,  // per-proto proxies
        NULL, NULL,  // SOCKS
        NULL,  // no_proxy
      },

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      true,                       // auto_detect
      GURL(),                     // pac_url
      ProxyRulesExpectation::Empty(),
    },

    {
      TEST_DESC("Valid PAC URL"),
      { // Input.
        NULL,  // DESKTOP_SESSION
        NULL,  // HOME
        NULL,  // KDEHOME
        NULL,  // KDE_SESSION_VERSION
        "http://wpad/wpad.dat",  // auto_proxy
        NULL,  // all_proxy
        NULL, NULL, NULL,  // per-proto proxies
        NULL, NULL,  // SOCKS
        NULL,  // no_proxy
      },

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                         // auto_detect
      GURL("http://wpad/wpad.dat"),  // pac_url
      ProxyRulesExpectation::Empty(),
    },

    {
      TEST_DESC("Invalid PAC URL"),
      { // Input.
        NULL,  // DESKTOP_SESSION
        NULL,  // HOME
        NULL,  // KDEHOME
        NULL,  // KDE_SESSION_VERSION
        "wpad.dat",  // auto_proxy
        NULL,  // all_proxy
        NULL, NULL, NULL,  // per-proto proxies
        NULL, NULL,  // SOCKS
        NULL,  // no_proxy
      },

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                       // auto_detect
      GURL(),                     // pac_url
      ProxyRulesExpectation::Empty(),
    },

    {
      TEST_DESC("Single-host in proxy list"),
      { // Input.
        NULL,  // DESKTOP_SESSION
        NULL,  // HOME
        NULL,  // KDEHOME
        NULL,  // KDE_SESSION_VERSION
        NULL,  // auto_proxy
        "www.google.com",  // all_proxy
        NULL, NULL, NULL,  // per-proto proxies
        NULL, NULL,  // SOCKS
        NULL,  // no_proxy
      },

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                   // auto_detect
      GURL(),                                  // pac_url
      ProxyRulesExpectation::Single(
          "www.google.com:80",  // single proxy
          ""),                  // bypass rules
    },

    {
      TEST_DESC("Single-host, different port"),
      { // Input.
        NULL,  // DESKTOP_SESSION
        NULL,  // HOME
        NULL,  // KDEHOME
        NULL,  // KDE_SESSION_VERSION
        NULL,  // auto_proxy
        "www.google.com:99",  // all_proxy
        NULL, NULL, NULL,  // per-proto proxies
        NULL, NULL,  // SOCKS
        NULL,  // no_proxy
      },

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                   // auto_detect
      GURL(),                                  // pac_url
      ProxyRulesExpectation::Single(
          "www.google.com:99",  // single
          ""),                  // bypass rules
    },

    {
      TEST_DESC("Tolerate a scheme"),
      { // Input.
        NULL,  // DESKTOP_SESSION
        NULL,  // HOME
        NULL,  // KDEHOME
        NULL,  // KDE_SESSION_VERSION
        NULL,  // auto_proxy
        "http://www.google.com:99",  // all_proxy
        NULL, NULL, NULL,  // per-proto proxies
        NULL, NULL,  // SOCKS
        NULL,  // no_proxy
      },

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                   // auto_detect
      GURL(),                                  // pac_url
      ProxyRulesExpectation::Single(
          "www.google.com:99",  // single proxy
          ""),                  // bypass rules
    },

    {
      TEST_DESC("Per-scheme proxy rules"),
      { // Input.
        NULL,  // DESKTOP_SESSION
        NULL,  // HOME
        NULL,  // KDEHOME
        NULL,  // KDE_SESSION_VERSION
        NULL,  // auto_proxy
        NULL,  // all_proxy
        "www.google.com:80", "www.foo.com:110", "ftp.foo.com:121",  // per-proto
        NULL, NULL,  // SOCKS
        NULL,  // no_proxy
      },

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                   // auto_detect
      GURL(),                                  // pac_url
      ProxyRulesExpectation::PerScheme(
          "www.google.com:80",  // http
          "www.foo.com:110",    // https
          "ftp.foo.com:121",    // ftp
          ""),                  // bypass rules
    },

    {
      TEST_DESC("socks"),
      { // Input.
        NULL,  // DESKTOP_SESSION
        NULL,  // HOME
        NULL,  // KDEHOME
        NULL,  // KDE_SESSION_VERSION
        NULL,  // auto_proxy
        "",  // all_proxy
        NULL, NULL, NULL,  // per-proto proxies
        "socks.com:888", NULL,  // SOCKS
        NULL,  // no_proxy
      },

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                   // auto_detect
      GURL(),                                  // pac_url
      ProxyRulesExpectation::Single(
          "socks5://socks.com:888",  // single proxy
          ""),                       // bypass rules
    },

    {
      TEST_DESC("socks4"),
      { // Input.
        NULL,  // DESKTOP_SESSION
        NULL,  // HOME
        NULL,  // KDEHOME
        NULL,  // KDE_SESSION_VERSION
        NULL,  // auto_proxy
        "",  // all_proxy
        NULL, NULL, NULL,  // per-proto proxies
        "socks.com:888", "4",  // SOCKS
        NULL,  // no_proxy
      },

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                   // auto_detect
      GURL(),                                  // pac_url
      ProxyRulesExpectation::Single(
          "socks4://socks.com:888",  // single proxy
          ""),                       // bypass rules
    },

    {
      TEST_DESC("socks default port"),
      { // Input.
        NULL,  // DESKTOP_SESSION
        NULL,  // HOME
        NULL,  // KDEHOME
        NULL,  // KDE_SESSION_VERSION
        NULL,  // auto_proxy
        "",  // all_proxy
        NULL, NULL, NULL,  // per-proto proxies
        "socks.com", NULL,  // SOCKS
        NULL,  // no_proxy
      },

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                   // auto_detect
      GURL(),                                  // pac_url
      ProxyRulesExpectation::Single(
          "socks5://socks.com:1080",  // single proxy
          ""),                        // bypass rules
    },

    {
      TEST_DESC("bypass"),
      { // Input.
        NULL,  // DESKTOP_SESSION
        NULL,  // HOME
        NULL,  // KDEHOME
        NULL,  // KDE_SESSION_VERSION
        NULL,  // auto_proxy
        "www.google.com",  // all_proxy
        NULL, NULL, NULL,  // per-proto
        NULL, NULL,  // SOCKS
        ".google.com, foo.com:99, 1.2.3.4:22, 127.0.0.1/8",  // no_proxy
      },

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                      // auto_detect
      GURL(),                     // pac_url
      ProxyRulesExpectation::Single(
          "www.google.com:80",
          "*.google.com,*foo.com:99,1.2.3.4:22,127.0.0.1/8"),
    },
  };

  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(tests); ++i) {
    SCOPED_TRACE(base::StringPrintf("Test[%" PRIuS "] %s", i,
                                    tests[i].description.c_str()));
    MockEnvironment* env = new MockEnvironment;
    MockSettingGetter* setting_getter = new MockSettingGetter;
    SynchConfigGetter sync_config_getter(
        new ProxyConfigServiceLinux(env, setting_getter));
    ProxyConfig config;
    env->values = tests[i].values;
    sync_config_getter.SetupAndInitialFetch();
    ProxyConfigService::ConfigAvailability availability =
        sync_config_getter.SyncGetLatestProxyConfig(&config);
    EXPECT_EQ(tests[i].availability, availability);

    if (availability == ProxyConfigService::CONFIG_VALID) {
      EXPECT_EQ(tests[i].auto_detect, config.auto_detect());
      EXPECT_EQ(tests[i].pac_url, config.pac_url());
      EXPECT_TRUE(tests[i].proxy_rules.Matches(config.proxy_rules()));
    }
  }
}

TEST_F(ProxyConfigServiceLinuxTest, GconfNotification) {
  MockEnvironment* env = new MockEnvironment;
  MockSettingGetter* setting_getter = new MockSettingGetter;
  ProxyConfigServiceLinux* service =
      new ProxyConfigServiceLinux(env, setting_getter);
  SynchConfigGetter sync_config_getter(service);
  ProxyConfig config;

  // Start with no proxy.
  setting_getter->values.mode = "none";
  sync_config_getter.SetupAndInitialFetch();
  EXPECT_EQ(ProxyConfigService::CONFIG_VALID,
            sync_config_getter.SyncGetLatestProxyConfig(&config));
  EXPECT_FALSE(config.auto_detect());

  // Now set to auto-detect.
  setting_getter->values.mode = "auto";
  // Simulate setting change notification callback.
  service->OnCheckProxyConfigSettings();
  EXPECT_EQ(ProxyConfigService::CONFIG_VALID,
            sync_config_getter.SyncGetLatestProxyConfig(&config));
  EXPECT_TRUE(config.auto_detect());
}

TEST_F(ProxyConfigServiceLinuxTest, KDEConfigParser) {
  // One of the tests below needs a worst-case long line prefix. We build it
  // programmatically so that it will always be the right size.
  std::string long_line;
  size_t limit = ProxyConfigServiceLinux::SettingGetter::BUFFER_SIZE - 1;
  for (size_t i = 0; i < limit; ++i)
    long_line += "-";

  // Inspired from proxy_config_service_win_unittest.cc.
  const struct {
    // Short description to identify the test
    std::string description;

    // Input.
    std::string kioslaverc;
    EnvVarValues env_values;

    // Expected outputs (availability and fields of ProxyConfig).
    ProxyConfigService::ConfigAvailability availability;
    bool auto_detect;
    GURL pac_url;
    ProxyRulesExpectation proxy_rules;
  } tests[] = {
    {
      TEST_DESC("No proxying"),

      // Input.
      "[Proxy Settings]\nProxyType=0\n",
      {},                                      // env_values

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                      // auto_detect
      GURL(),                     // pac_url
      ProxyRulesExpectation::Empty(),
    },

    {
      TEST_DESC("Auto detect"),

      // Input.
      "[Proxy Settings]\nProxyType=3\n",
      {},                                      // env_values

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      true,                       // auto_detect
      GURL(),                     // pac_url
      ProxyRulesExpectation::Empty(),
    },

    {
      TEST_DESC("Valid PAC URL"),

      // Input.
      "[Proxy Settings]\nProxyType=2\n"
          "Proxy Config Script=http://wpad/wpad.dat\n",
      {},                                      // env_values

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                         // auto_detect
      GURL("http://wpad/wpad.dat"),  // pac_url
      ProxyRulesExpectation::Empty(),
    },

    {
      TEST_DESC("Valid PAC file without file://"),

      // Input.
      "[Proxy Settings]\nProxyType=2\n"
          "Proxy Config Script=/wpad/wpad.dat\n",
      {},                                      // env_values

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                         // auto_detect
      GURL("file:///wpad/wpad.dat"),  // pac_url
      ProxyRulesExpectation::Empty(),
    },

    {
      TEST_DESC("Per-scheme proxy rules"),

      // Input.
      "[Proxy Settings]\nProxyType=1\nhttpProxy=www.google.com\n"
          "httpsProxy=www.foo.com\nftpProxy=ftp.foo.com\n",
      {},                                      // env_values

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                   // auto_detect
      GURL(),                                  // pac_url
      ProxyRulesExpectation::PerScheme(
          "www.google.com:80",  // http
          "www.foo.com:80",     // https
          "ftp.foo.com:80",     // http
          ""),                  // bypass rules
    },

    {
      TEST_DESC("Only HTTP proxy specified"),

      // Input.
      "[Proxy Settings]\nProxyType=1\n"
          "httpProxy=www.google.com\n",
      {},                                      // env_values

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                   // auto_detect
      GURL(),                                  // pac_url
      ProxyRulesExpectation::PerScheme(
          "www.google.com:80",  // http
          "",                   // https
          "",                   // ftp
          ""),                  // bypass rules
    },

    {
      TEST_DESC("Only HTTP proxy specified, different port"),

      // Input.
      "[Proxy Settings]\nProxyType=1\n"
          "httpProxy=www.google.com:88\n",
      {},                                      // env_values

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                   // auto_detect
      GURL(),                                  // pac_url
      ProxyRulesExpectation::PerScheme(
          "www.google.com:88",  // http
          "",                   // https
          "",                   // ftp
          ""),                  // bypass rules
    },

    {
      TEST_DESC("Only HTTP proxy specified, different port, space-delimited"),

      // Input.
      "[Proxy Settings]\nProxyType=1\n"
          "httpProxy=www.google.com 88\n",
      {},                                      // env_values

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                   // auto_detect
      GURL(),                                  // pac_url
      ProxyRulesExpectation::PerScheme(
          "www.google.com:88",  // http
          "",                   // https
          "",                   // ftp
          ""),                  // bypass rules
    },

    {
      TEST_DESC("Bypass *.google.com"),

      // Input.
      "[Proxy Settings]\nProxyType=1\nhttpProxy=www.google.com\n"
          "NoProxyFor=.google.com\n",
      {},                                      // env_values

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                   // auto_detect
      GURL(),                                  // pac_url
      ProxyRulesExpectation::PerScheme(
          "www.google.com:80",  // http
          "",                   // https
          "",                   // ftp
          "*.google.com"),      // bypass rules
    },

    {
      TEST_DESC("Bypass *.google.com and *.kde.org"),

      // Input.
      "[Proxy Settings]\nProxyType=1\nhttpProxy=www.google.com\n"
          "NoProxyFor=.google.com,.kde.org\n",
      {},                                      // env_values

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                   // auto_detect
      GURL(),                                  // pac_url
      ProxyRulesExpectation::PerScheme(
          "www.google.com:80",           // http
          "",                            // https
          "",                            // ftp
          "*.google.com,*.kde.org"),     // bypass rules
    },

    {
      TEST_DESC("Correctly parse bypass list with ReversedException"),

      // Input.
      "[Proxy Settings]\nProxyType=1\nhttpProxy=www.google.com\n"
          "NoProxyFor=.google.com\nReversedException=true\n",
      {},                                      // env_values

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                   // auto_detect
      GURL(),                                  // pac_url
      ProxyRulesExpectation::PerSchemeWithBypassReversed(
          "www.google.com:80",  // http
          "",                   // https
          "",                   // ftp
          "*.google.com"),      // bypass rules
    },

    {
      TEST_DESC("socks"),

      // Input.
      "[Proxy Settings]\nProxyType=1\nsocksProxy=socks.com 888\n",
      {},                                      // env_values

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                   // auto_detect
      GURL(),                                  // pac_url
      ProxyRulesExpectation::Single(
          "socks5://socks.com:888",  // single proxy
          ""),                       // bypass rules
    },

    {
      TEST_DESC("socks4"),

      // Input.
      "[Proxy Settings]\nProxyType=1\nsocksProxy=socks4://socks.com 888\n",
      {},                                      // env_values

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                   // auto_detect
      GURL(),                                  // pac_url
      ProxyRulesExpectation::Single(
          "socks4://socks.com:888",  // single proxy
          ""),                       // bypass rules
    },

    {
      TEST_DESC("Treat all hostname patterns as wildcard patterns"),

      // Input.
      "[Proxy Settings]\nProxyType=1\nhttpProxy=www.google.com\n"
          "NoProxyFor=google.com,kde.org,<local>\n",
      {},                                      // env_values

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                   // auto_detect
      GURL(),                                  // pac_url
      ProxyRulesExpectation::PerScheme(
          "www.google.com:80",              // http
          "",                               // https
          "",                               // ftp
          "*google.com,*kde.org,<local>"),  // bypass rules
    },

    {
      TEST_DESC("Allow trailing whitespace after boolean value"),

      // Input.
      "[Proxy Settings]\nProxyType=1\nhttpProxy=www.google.com\n"
          "NoProxyFor=.google.com\nReversedException=true  \n",
      {},                                      // env_values

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                   // auto_detect
      GURL(),                                  // pac_url
      ProxyRulesExpectation::PerSchemeWithBypassReversed(
          "www.google.com:80",  // http
          "",                   // https
          "",                   // ftp
          "*.google.com"),      // bypass rules
    },

    {
      TEST_DESC("Ignore settings outside [Proxy Settings]"),

      // Input.
      "httpsProxy=www.foo.com\n[Proxy Settings]\nProxyType=1\n"
          "httpProxy=www.google.com\n[Other Section]\nftpProxy=ftp.foo.com\n",
      {},                                      // env_values

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                   // auto_detect
      GURL(),                                  // pac_url
      ProxyRulesExpectation::PerScheme(
          "www.google.com:80",  // http
          "",                   // https
          "",                   // ftp
          ""),                  // bypass rules
    },

    {
      TEST_DESC("Handle CRLF line endings"),

      // Input.
      "[Proxy Settings]\r\nProxyType=1\r\nhttpProxy=www.google.com\r\n",
      {},                                      // env_values

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                   // auto_detect
      GURL(),                                  // pac_url
      ProxyRulesExpectation::PerScheme(
          "www.google.com:80",  // http
          "",                   // https
          "",                   // ftp
          ""),                  // bypass rules
    },

    {
      TEST_DESC("Handle blank lines and mixed line endings"),

      // Input.
      "[Proxy Settings]\r\n\nProxyType=1\n\r\nhttpProxy=www.google.com\n\n",
      {},                                      // env_values

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                   // auto_detect
      GURL(),                                  // pac_url
      ProxyRulesExpectation::PerScheme(
          "www.google.com:80",  // http
          "",                   // https
          "",                   // ftp
          ""),                  // bypass rules
    },

    {
      TEST_DESC("Handle localized settings"),

      // Input.
      "[Proxy Settings]\nProxyType[$e]=1\nhttpProxy[$e]=www.google.com\n",
      {},                                      // env_values

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                   // auto_detect
      GURL(),                                  // pac_url
      ProxyRulesExpectation::PerScheme(
          "www.google.com:80",  // http
          "",                   // https
          "",                   // ftp
          ""),                  // bypass rules
    },

    {
      TEST_DESC("Ignore malformed localized settings"),

      // Input.
      "[Proxy Settings]\nProxyType=1\nhttpProxy=www.google.com\n"
          "httpsProxy$e]=www.foo.com\nftpProxy=ftp.foo.com\n",
      {},                                      // env_values

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                   // auto_detect
      GURL(),                                  // pac_url
      ProxyRulesExpectation::PerScheme(
          "www.google.com:80",  // http
          "",                   // https
          "ftp.foo.com:80",     // ftp
          ""),                  // bypass rules
    },

    {
      TEST_DESC("Handle strange whitespace"),

      // Input.
      "[Proxy Settings]\nProxyType [$e] =2\n"
          "  Proxy Config Script =  http:// foo\n",
      {},                                      // env_values

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                   // auto_detect
      GURL("http:// foo"),                     // pac_url
      ProxyRulesExpectation::Empty(),
    },

    {
      TEST_DESC("Ignore all of a line which is too long"),

      // Input.
      std::string("[Proxy Settings]\nProxyType=1\nftpProxy=ftp.foo.com\n") +
          long_line + "httpsProxy=www.foo.com\nhttpProxy=www.google.com\n",
      {},                                          // env_values

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                       // auto_detect
      GURL(),                                      // pac_url
      ProxyRulesExpectation::PerScheme(
          "www.google.com:80",  // http
          "",                   // https
          "ftp.foo.com:80",     // ftp
          ""),                  // bypass rules
    },

    {
      TEST_DESC("Indirect Proxy - no env vars set"),

      // Input.
      "[Proxy Settings]\nProxyType=4\nhttpProxy=http_proxy\n"
          "httpsProxy=https_proxy\nftpProxy=ftp_proxy\nNoProxyFor=no_proxy\n",
      {},                                      // env_values

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                   // auto_detect
      GURL(),                                  // pac_url
      ProxyRulesExpectation::Empty(),
    },

    {
      TEST_DESC("Indirect Proxy - with env vars set"),

      // Input.
      "[Proxy Settings]\nProxyType=4\nhttpProxy=http_proxy\n"
          "httpsProxy=https_proxy\nftpProxy=ftp_proxy\nNoProxyFor=no_proxy\n",
      {  // env_values
        NULL,  // DESKTOP_SESSION
        NULL,  // HOME
        NULL,  // KDEHOME
        NULL,  // KDE_SESSION_VERSION
        NULL,  // auto_proxy
        NULL,  // all_proxy
        "www.normal.com",  // http_proxy
        "www.secure.com",  // https_proxy
        "ftp.foo.com",  // ftp_proxy
        NULL, NULL,  // SOCKS
        ".google.com, .kde.org",  // no_proxy
      },

      // Expected result.
      ProxyConfigService::CONFIG_VALID,
      false,                                   // auto_detect
      GURL(),                                  // pac_url
      ProxyRulesExpectation::PerScheme(
          "www.normal.com:80",           // http
          "www.secure.com:80",           // https
          "ftp.foo.com:80",              // ftp
          "*.google.com,*.kde.org"),     // bypass rules
    },

  };

  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(tests); ++i) {
    SCOPED_TRACE(base::StringPrintf("Test[%" PRIuS "] %s", i,
                                    tests[i].description.c_str()));
    MockEnvironment* env = new MockEnvironment;
    env->values = tests[i].env_values;
    // Force the KDE getter to be used and tell it where the test is.
    env->values.DESKTOP_SESSION = "kde4";
    env->values.KDEHOME = kde_home_.value().c_str();
    SynchConfigGetter sync_config_getter(
        new ProxyConfigServiceLinux(env));
    ProxyConfig config;
    // Overwrite the kioslaverc file.
    file_util::WriteFile(kioslaverc_, tests[i].kioslaverc.c_str(),
                         tests[i].kioslaverc.length());
    sync_config_getter.SetupAndInitialFetch();
    ProxyConfigService::ConfigAvailability availability =
        sync_config_getter.SyncGetLatestProxyConfig(&config);
    EXPECT_EQ(tests[i].availability, availability);

    if (availability == ProxyConfigService::CONFIG_VALID) {
      EXPECT_EQ(tests[i].auto_detect, config.auto_detect());
      EXPECT_EQ(tests[i].pac_url, config.pac_url());
      EXPECT_TRUE(tests[i].proxy_rules.Matches(config.proxy_rules()));
    }
  }
}

TEST_F(ProxyConfigServiceLinuxTest, KDEHomePicker) {
  // Auto detect proxy settings.
  std::string slaverc3 = "[Proxy Settings]\nProxyType=3\n";
  // Valid PAC URL.
  std::string slaverc4 = "[Proxy Settings]\nProxyType=2\n"
                             "Proxy Config Script=http://wpad/wpad.dat\n";
  GURL slaverc4_pac_url("http://wpad/wpad.dat");

  // Overwrite the .kde kioslaverc file.
  file_util::WriteFile(kioslaverc_, slaverc3.c_str(), slaverc3.length());

  // If .kde4 exists it will mess up the first test. It should not, as
  // we created the directory for $HOME in the test setup.
  CHECK(!base::DirectoryExists(kde4_home_));

  { SCOPED_TRACE("KDE4, no .kde4 directory, verify fallback");
    MockEnvironment* env = new MockEnvironment;
    env->values.DESKTOP_SESSION = "kde4";
    env->values.HOME = user_home_.value().c_str();
    SynchConfigGetter sync_config_getter(
        new ProxyConfigServiceLinux(env));
    ProxyConfig config;
    sync_config_getter.SetupAndInitialFetch();
    EXPECT_EQ(ProxyConfigService::CONFIG_VALID,
              sync_config_getter.SyncGetLatestProxyConfig(&config));
    EXPECT_TRUE(config.auto_detect());
    EXPECT_EQ(GURL(), config.pac_url());
  }

  // Now create .kde4 and put a kioslaverc in the config directory.
  // Note that its timestamp will be at least as new as the .kde one.
  base::CreateDirectory(kde4_config_);
  file_util::WriteFile(kioslaverc4_, slaverc4.c_str(), slaverc4.length());
  CHECK(base::PathExists(kioslaverc4_));

  { SCOPED_TRACE("KDE4, .kde4 directory present, use it");
    MockEnvironment* env = new MockEnvironment;
    env->values.DESKTOP_SESSION = "kde4";
    env->values.HOME = user_home_.value().c_str();
    SynchConfigGetter sync_config_getter(
        new ProxyConfigServiceLinux(env));
    ProxyConfig config;
    sync_config_getter.SetupAndInitialFetch();
    EXPECT_EQ(ProxyConfigService::CONFIG_VALID,
              sync_config_getter.SyncGetLatestProxyConfig(&config));
    EXPECT_FALSE(config.auto_detect());
    EXPECT_EQ(slaverc4_pac_url, config.pac_url());
  }

  { SCOPED_TRACE("KDE3, .kde4 directory present, ignore it");
    MockEnvironment* env = new MockEnvironment;
    env->values.DESKTOP_SESSION = "kde";
    env->values.HOME = user_home_.value().c_str();
    SynchConfigGetter sync_config_getter(
        new ProxyConfigServiceLinux(env));
    ProxyConfig config;
    sync_config_getter.SetupAndInitialFetch();
    EXPECT_EQ(ProxyConfigService::CONFIG_VALID,
              sync_config_getter.SyncGetLatestProxyConfig(&config));
    EXPECT_TRUE(config.auto_detect());
    EXPECT_EQ(GURL(), config.pac_url());
  }

  { SCOPED_TRACE("KDE4, .kde4 directory present, KDEHOME set to .kde");
    MockEnvironment* env = new MockEnvironment;
    env->values.DESKTOP_SESSION = "kde4";
    env->values.HOME = user_home_.value().c_str();
    env->values.KDEHOME = kde_home_.value().c_str();
    SynchConfigGetter sync_config_getter(
        new ProxyConfigServiceLinux(env));
    ProxyConfig config;
    sync_config_getter.SetupAndInitialFetch();
    EXPECT_EQ(ProxyConfigService::CONFIG_VALID,
              sync_config_getter.SyncGetLatestProxyConfig(&config));
    EXPECT_TRUE(config.auto_detect());
    EXPECT_EQ(GURL(), config.pac_url());
  }

  // Finally, make the .kde4 config directory older than the .kde directory
  // and make sure we then use .kde instead of .kde4 since it's newer.
  base::TouchFile(kde4_config_, base::Time(), base::Time());

  { SCOPED_TRACE("KDE4, very old .kde4 directory present, use .kde");
    MockEnvironment* env = new MockEnvironment;
    env->values.DESKTOP_SESSION = "kde4";
    env->values.HOME = user_home_.value().c_str();
    SynchConfigGetter sync_config_getter(
        new ProxyConfigServiceLinux(env));
    ProxyConfig config;
    sync_config_getter.SetupAndInitialFetch();
    EXPECT_EQ(ProxyConfigService::CONFIG_VALID,
              sync_config_getter.SyncGetLatestProxyConfig(&config));
    EXPECT_TRUE(config.auto_detect());
    EXPECT_EQ(GURL(), config.pac_url());
  }
}

}  // namespace net