tests/acceptance: Refactor exec_command_and_wait_for_pattern()

Refactor the exec_command_and_wait_for_pattern() utility method
so we can reuse it in other files.
Signed-off-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20191028073441.6448-6-philmd@redhat.com>
Reviewed-by: NCleber Rosa <crosa@redhat.com>
Tested-by: NCleber Rosa <crosa@redhat.com>
Signed-off-by: NCleber Rosa <crosa@redhat.com>

tests/acceptance/avocado_qemu/__init__.py

@@ -80,6 +80,25 @@ def wait_for_console_pattern(test, success_message, failure_message=None):
             test.fail(fail)
 
 
+def exec_command_and_wait_for_pattern(test, command,
+                                      success_message, failure_message=None):
+    """
+    Send a command to a console (appending CRLF characters), then wait
+    for success_message to appear on the console, while logging the.
+    content. Mark the test as failed if failure_message is found instead.
+
+    :param test: an Avocado test containing a VM that will have its console
+                 read and probed for a success or failure message
+    :type test: :class:`avocado_qemu.Test`
+    :param command: the command to send
+    :param success_message: if this message appears, test succeeds
+    :param failure_message: if this message appears, test fails
+    """
+    command += '\r'
+    test.vm.console_socket.sendall(command.encode())
+    wait_for_console_pattern(test, success_message, failure_message)
+
+
 class Test(avocado.Test):
     def setUp(self):
         self._vms = {}

tests/acceptance/boot_linux_console.py

@@ -14,6 +14,7 @@ import gzip
 import shutil
 
 from avocado_qemu import Test
+from avocado_qemu import exec_command_and_wait_for_pattern
 from avocado_qemu import wait_for_console_pattern
 from avocado.utils import process
 from avocado.utils import archive
@@ -33,11 +34,6 @@ class BootLinuxConsole(Test):
         wait_for_console_pattern(self, success_message,
                                  failure_message='Kernel panic - not syncing')
 
-    def exec_command_and_wait_for_pattern(self, command, success_message):
-        command += '\r'
-        self.vm.console_socket.sendall(command.encode())
-        wait_for_console_pattern(self, success_message)
-
     def extract_from_deb(self, deb, path):
         """
         Extracts a file from a deb package into the test workdir
@@ -166,12 +162,12 @@ class BootLinuxConsole(Test):
         self.vm.launch()
         self.wait_for_console_pattern('Boot successful.')
 
-        self.exec_command_and_wait_for_pattern('cat /proc/cpuinfo',
-                                               'BogoMIPS')
-        self.exec_command_and_wait_for_pattern('uname -a',
-                                               'Debian')
-        self.exec_command_and_wait_for_pattern('reboot',
-                                               'reboot: Restarting system')
+        exec_command_and_wait_for_pattern(self, 'cat /proc/cpuinfo',
+                                                'BogoMIPS')
+        exec_command_and_wait_for_pattern(self, 'uname -a',
+                                                'Debian')
+        exec_command_and_wait_for_pattern(self, 'reboot',
+                                                'reboot: Restarting system')
 
     def do_test_mips_malta32el_nanomips(self, kernel_url, kernel_hash):
         kernel_path_xz = self.fetch_asset(kernel_url, asset_hash=kernel_hash)