How to use the pywatchman.SocketConnectError function in pywatchman

def test_user_not_in_sock_group(self):
        group = self._get_non_member_group()
        instance = self._new_instance(
            {"sock_group": group.gr_name}, expect_success=False
        )
        with self.assertRaises(pywatchman.SocketConnectError) as ctx:
            instance.start()
        self.assertEqual(ctx.exception.sockpath, instance.getSockPath())
        wanted = "setting up group '%s' failed" % group.gr_name
        self.assertWaitFor(
            lambda: wanted in instance.getCLILogContents(),
            get_debug_output=lambda: instance.getCLILogContents(),
        )

if self.debug_watchman:
            print("Watchman instance PID: " + str(self.proc.pid))
            if pywatchman.compat.PYTHON3:
                user_input = input
            else:
                user_input = raw_input  # noqa:F821
            user_input("Press Enter to continue...")

        # wait for it to come up
        deadline = time.time() + self.start_timeout
        while time.time() < deadline:
            try:
                client = pywatchman.client(sockpath=self.sock_file)
                self.pid = client.query("get-pid")["pid"]
                break
            except pywatchman.SocketConnectError:
                t, val, tb = sys.exc_info()
                time.sleep(0.1)
            finally:
                client.close()

        if self.pid is None:
            # self.proc didn't come up: wait for it to die
            self.stop()
            pywatchman.compat.reraise(t, val, tb)

def test_too_open_user_dir(self):
        instance = self._new_instance({}, expect_success=False)
        os.makedirs(instance.user_dir)
        os.chmod(instance.user_dir, 0o777)
        with self.assertRaises(pywatchman.SocketConnectError) as ctx:
            instance.start()
        self.assertEqual(ctx.exception.sockpath, instance.getSockPath())

        wanted = "the permissions on %s allow others to write to it" % (
            instance.user_dir
        )
        self.assertWaitFor(
            lambda: wanted in instance.getCLILogContents(),
            get_debug_output=lambda: instance.getCLILogContents(),
        )