Re: [Qemu-devel] [PATCH 10/18] Boot Linux Console Test: refactor the console watcher into utility method

[Wainer dos Santos Moschetta <wainersm@redhat.com>]

Hi Cleber,

On 01/17/2019 04:56 PM, Cleber Rosa wrote:
> This introduces a utility method that monitors the console device and
> looks for either a message that signals the test success or failure.
>
> Signed-off-by: Cleber Rosa <crosa@redhat.com>
> ---
>   tests/acceptance/boot_linux_console.py | 30 ++++++++++++++++++--------
>   1 file changed, 21 insertions(+), 9 deletions(-)
>
> diff --git a/tests/acceptance/boot_linux_console.py b/tests/acceptance/boot_linux_console.py
> index 35b31162d4..278bb2be3d 100644
> --- a/tests/acceptance/boot_linux_console.py
> +++ b/tests/acceptance/boot_linux_console.py
> @@ -23,6 +23,25 @@ class BootLinuxConsole(Test):
>   
>       timeout = 60
>   
> +    def wait_for_console_pattern(self, success_message,
> +                                 failure_message='Kernel panic - not syncing'):
> +        """
> +        Waits for messages to appear on the console, while logging the content
> +
> +        :param success_message: if this message appears, test succeeds
> +        :param failure_message: if this message appears, test fails
> +        """

What's the docstring format used here? I am wondering if :type is optional.

- Wainer

> +        console = self.vm.console_socket.makefile()
> +        console_logger = logging.getLogger('console')
> +        while True:
> +            msg = console.readline()
> +            console_logger.debug(msg.strip())
> +            if success_message in msg:
> +                break
> +            if failure_message in msg:
> +                fail = 'Failure message found in console: %s' % failure_message
> +                self.fail(fail)
> +
>       def test_x86_64_pc(self):
>           """
>           :avocado: tags=arch:x86_64
> @@ -39,12 +58,5 @@ class BootLinuxConsole(Test):
>           self.vm.add_args('-kernel', kernel_path,
>                            '-append', kernel_command_line)
>           self.vm.launch()
> -        console = self.vm.console_socket.makefile()
> -        console_logger = logging.getLogger('console')
> -        while True:
> -            msg = console.readline()
> -            console_logger.debug(msg.strip())
> -            if 'Kernel command line: %s' % kernel_command_line in msg:
> -                break
> -            if 'Kernel panic - not syncing' in msg:
> -                self.fail("Kernel panic reached")
> +        console_pattern = 'Kernel command line: %s' % kernel_command_line
> +        self.wait_for_console_pattern(console_pattern)