resolv_integration_test: refactor TestCase to TestSuite am: 19a291bb

class ResolverTest : public ::testing::Test {

  public:

    static void SetUpTestCase() {

    static void SetUpTestSuite() {

        // Get binder service.

        // Note that |mDnsClient| is not used for getting binder service in this static function.

        // The reason is that wants to keep |mDnsClient| as a non-static data member. |mDnsClient|

        // recipient.

        ABinderProcess_startThreadPool();

    }

    static void TearDownTestCase() { AIBinder_DeathRecipient_delete(sResolvDeathRecipient); }

    static void TearDownTestSuite() { AIBinder_DeathRecipient_delete(sResolvDeathRecipient); }

  protected:

    void SetUp() { mDnsClient.SetUp(); }

    // TODO: Perhaps add an unregistering listener binder call or fork a listener process which

    // could be terminated earlier.

    static std::shared_ptr<DnsMetricsListener>

            sDnsMetricsListener;  // Initialized in SetUpTestCase.

            sDnsMetricsListener;  // Initialized in SetUpTestSuite.

    // Use a shared static death recipient to monitor the service death. The static death

    // recipient could monitor the death not only during the test but also between tests.

    static AIBinder_DeathRecipient* sResolvDeathRecipient;  // Initialized in SetUpTestCase.

    static AIBinder_DeathRecipient* sResolvDeathRecipient;  // Initialized in SetUpTestSuite.

};

// Initialize static member of class.