qemu_guest_agent: new case of guest agent log check

check guest agent logs via -v and -l parameters.
Signed-off-by: NXiaoling Gao <xiagao@redhat.com>

qemu/tests/cfg/qemu_guest_agent.cfg

@@ -251,6 +251,15 @@
             image_name_stg0 = images/storage0
             image_size_stg0 = 1G
             force_create_image_stg0 = yes
+        - gagent_check_log:
+            only isa_serial
+            gagent_check_type = log
+            black_list = "guest-file-[a-zA-Z]*"
+            get_log_cmd = cat /var/log/qemu-ga/qemu-ga.log |grep "read data"
+            tmp_file = "/tmp/qga_test"
+            Windows:
+                get_log_cmd = type c:\qga.log |findstr /c:"read data"
+                tmp_file = "C:\qga_test.txt"
         - gagent_query_chardev:
             no isa_serial
             gagent_check_type = query_chardev
@@ -280,10 +289,10 @@
             only i386, x86_64
             gagent_serial_type = isa
             serials += " org.qemu.guest_agent.0"
-            gagent_start_cmd = "pgrep qemu-ga || qemu-ga -d -m isa-serial -p /dev/ttyS1"
+            gagent_start_cmd = "pgrep qemu-ga || qemu-ga -d -m isa-serial -p /dev/ttyS1 -l /var/log/qemu-ga/qemu-ga.log -v"
             gagent_status_cmd = "pgrep qemu-ga"
-            gagent_restart_cmd = "pgrep qemu-ga |xargs kill -s 9 && qemu-ga -d -m isa-serial -p /dev/ttyS1"
+            gagent_restart_cmd = "pgrep qemu-ga |xargs kill -s 9 &&  ${gagent_start_cmd}"
             Windows:
-                gagent_start_cmd = "cd C:\Program Files\Qemu-ga & start /b qemu-ga.exe -m isa-serial -p COM2"
+                gagent_start_cmd = "cd C:\Program Files\Qemu-ga & start /b qemu-ga.exe -m isa-serial -p COM2 -l c:\qga.log -v"
                 gagent_status_cmd = "tasklist |findstr /i /r qemu-ga.exe.*Console"
                 gagent_restart_cmd = "taskkill /f /t /im qemu-ga.exe & ${gagent_start_cmd}"

qemu/tests/qemu_guest_agent.py

@@ -1933,6 +1933,52 @@ class QemuGuestAgentBasicCheck(QemuGuestAgentTest):
         else:
             test.fail("Should return error info.")
 
+    @error_context.context_aware
+    def gagent_check_log(self, test, params, env):
+        """
+        Check guest agent logs.
+        Steps:
+        1) start guest-agent to record logs
+        2) issue some guest agent commands
+        3) check agent log, if those commands are recorded
+
+        :param test: kvm test object
+        :param params: Dictionary with the test parameterspy
+        :param env: Dictionary with test environment.
+        """
+        def log_check(qga_cmd):
+            """
+            check guest agent log.
+            """
+            error_context.context("Check %s cmd in agent log." % qga_cmd,
+                                  logging.info)
+            log_str = session.cmd_output(get_log_cmd).strip().split('\n')[-1]
+            pattern = r"%s" % qga_cmd
+            if not re.findall(pattern, log_str, re.M | re.I):
+                test.fail("The %s command is not recorded in agent"
+                          " log." % qga_cmd)
+
+        get_log_cmd = params["get_log_cmd"]
+        session = self._get_session(self.params, self.vm)
+        self._open_session_list.append(session)
+        self._change_bl(session)
+
+        error_context.context("Issue some common guest agent commands.",
+                              logging.info)
+        self.gagent.get_time()
+        log_check("guest-get-time")
+
+        tmp_file = params["tmp_file"]
+        content = "hello world\n"
+        ret_handle = int(self.gagent.guest_file_open(tmp_file, mode="w+"))
+        log_check("guest-file-open")
+
+        self.gagent.guest_file_write(ret_handle, content)
+        log_check("guest-file-write")
+
+        self.gagent.guest_file_read(ret_handle)
+        log_check("guest-file-read")
+
     @error_context.context_aware
     def gagent_check_with_migrate(self, test, params, env):
         """