tests: Detect pcap vs. ioctl recording and run correct one

tests/umockdev-test.py

@@ -17,6 +17,8 @@ try:
     if version < (0, 13, 2):
         print('umockdev is too old for test to be reliable, expect random failures!')
         print('Please update umockdev to at least 0.13.2.')
+    pcap_supported = version >= (0, 15, 6) or os.getenv('CI_COMMIT_SHA') is not None
+
 except FileNotFoundError:
     print('umockdev-run not found, skipping test!')
     print('Please install umockdev.')
@@ -55,7 +57,24 @@ def cmp_pngs(png_a, png_b):
 
 def get_umockdev_runner(ioctl_basename):
     ioctl = os.path.join(ddir, "{}.ioctl".format(ioctl_basename))
+    pcap = os.path.join(ddir, "{}.pcapng".format(ioctl_basename))
+
     device = os.path.join(ddir, "device")
+
+    if os.path.exists(pcap):
+        p = open(device).readline().strip()
+        assert p.startswith('P: ')
+        syspath = '/sys' + p[3:]
+
+        umockdev = ['umockdev-run', '-d', device,
+                    '-p', "%s=%s" % (syspath, pcap),
+                    '--']
+
+        # Skip test if we detect too old umockdev for pcap replay
+        if not pcap_supported:
+            sys.exit(77)
+
+    else:
         dev = open(ioctl).readline().strip()
         assert dev.startswith('@DEV ')
         dev = dev[5:]