[PATCH v3 4/9] tests/acceptance: Refactor exec_command_and_wait_for_pattern()

["Philippe Mathieu-Daudé" <f4bug@amsat.org>]

From: Philippe Mathieu-Daudé <philmd@redhat.com>

The same utility method is already present in two different test
files, so let's consolidate it into a single utility function.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 tests/acceptance/avocado_qemu/__init__.py | 19 +++++++++++++++++++
 tests/acceptance/boot_linux_console.py    | 12 ++++--------
 2 files changed, 23 insertions(+), 8 deletions(-)

diff --git a/tests/acceptance/avocado_qemu/__init__.py b/tests/acceptance/avocado_qemu/__init__.py
index 39f72945cd..4d7d6b640a 100644
--- a/tests/acceptance/avocado_qemu/__init__.py
+++ b/tests/acceptance/avocado_qemu/__init__.py
@@ -80,6 +80,25 @@ def wait_for_console_pattern(test, success_message,
             test.fail(fail)
 
 
+def exec_command_and_wait_for_pattern(test, command,
+                                      success_message, failure_message):
+    """
+    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\n'
+    self.vm.console_socket.sendall(command.encode())
+    wait_for_console_pattern(self, success_message)
+
+
 class Test(avocado.Test):
     def setUp(self):
         self._vms = {}
diff --git a/tests/acceptance/boot_linux_console.py b/tests/acceptance/boot_linux_console.py
index bf9861296a..cc4d9be625 100644
--- a/tests/acceptance/boot_linux_console.py
+++ b/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
@@ -29,11 +30,6 @@ class BootLinuxConsole(Test):
 
     KERNEL_COMMON_COMMAND_LINE = 'printk.time=0 '
 
-    def exec_command_and_wait_for_pattern(self, command, success_message):
-        command += '\r\n'
-        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
@@ -162,11 +158,11 @@ class BootLinuxConsole(Test):
         self.vm.launch()
         wait_for_console_pattern(self, 'Boot successful.')
 
-        self.exec_command_and_wait_for_pattern('cat /proc/cpuinfo',
+        exec_command_and_wait_for_pattern(self, 'cat /proc/cpuinfo',
                                                'BogoMIPS')
-        self.exec_command_and_wait_for_pattern('uname -a',
+        exec_command_and_wait_for_pattern(self, 'uname -a',
                                                'Debian')
-        self.exec_command_and_wait_for_pattern('reboot',
+        exec_command_and_wait_for_pattern(self, 'reboot',
                                                'reboot: Restarting system')
 
     def do_test_mips_malta32el_nanomips(self, kernel_url, kernel_hash):
-- 
2.21.0