[PATCH v2] tests/acceptance: Test case for detecting -object crashes

[Eduardo Habkost <ehabkost@redhat.com>]

Add a simple test case that will run QEMU directly (without QMP)
just to check for crashes when using `-object`.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
Changes v1 -> v2:
* "Running command:" log message instead of "Command:" (Cleber)
* Use universal_newlines=True instead of encoding='utf-8' (Cleber)
* Rename devices() to get_devices() (Cleber)
* Use @avocado.fail_on(subprocess.CalledProcessError) (Cleber)
* Reword test_crash() docstring (Cleber)
* Reorder imports
---
 tests/acceptance/object_option.py | 53 +++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 tests/acceptance/object_option.py

diff --git a/tests/acceptance/object_option.py b/tests/acceptance/object_option.py
new file mode 100644
index 0000000000..511c03a36f
--- /dev/null
+++ b/tests/acceptance/object_option.py
@@ -0,0 +1,53 @@
+# Copyright (c) 2020 Red Hat, Inc.
+#
+# Author:
+#  Eduardo Habkost <ehabkost@redhat.com>
+#
+# This work is licensed under the terms of the GNU GPL, version 2 or
+# later.  See the COPYING file in the top-level directory.
+import shlex
+import subprocess
+
+import avocado
+import avocado_qemu
+
+
+class ObjectOption(avocado_qemu.Test):
+    """Check if ``-object`` option behaves as expected"""
+
+    def run(self, cmd, *args, **kwargs):
+        cmdstr = ' '.join(shlex.quote(c) for c in cmd)
+        self.log.info("Running command: %s", cmdstr)
+        return subprocess.run(cmd, universal_newlines=True, *args, **kwargs)
+
+    def get_devices(self):
+        out = self.run([self.qemu_bin, '-object', 'help'],
+                       check=True, stdout=subprocess.PIPE).stdout
+        lines = out.split('\n')
+        return [l.strip() for l in lines[1:] if l.strip()]
+
+    @avocado.fail_on(subprocess.CalledProcessError)
+    def test_help(self):
+        """Check if ``-object ...,help`` behaves as expected"""
+        for device in self.get_devices():
+            self.run([self.qemu_bin, '-object', '%s,help' % (device)],
+                     check=True,
+                     stdout=subprocess.DEVNULL)
+
+    @avocado.fail_on(subprocess.CalledProcessError)
+    def test_crash(self):
+        """Check that QEMU doesn't crash when using ``-object ...``"""
+        for device in self.get_devices():
+            r = self.run([self.qemu_bin, '-object',
+                                '%s,id=obj0' % (device),
+                                '-monitor', 'stdio'],
+                         input='quit\n',
+                         stdout=subprocess.DEVNULL,
+                         stderr=subprocess.PIPE)
+            if r.returncode not in (0, 1):
+                self.log.warn("QEMU stderr: %s", r.stderr)
+                self.log.warn("QEMU exit code: %d", r.returncode)
+                if r.returncode < 0:
+                    self.fail("QEMU crashed")
+                else:
+                    self.fail("Unexpected exit code")
-- 
2.26.2