tests/qtest: Pass migration tests individually to meson

Having glib tests (qtest) all defined in a single test file makes it
hard to know which test has failed when running CI. Create a new
'migration' test suite and move the migration tests individually to
meson.

For now, use the global migration-test timeout value, but we could set
a per-subtest timeout in the future.

Sample output:

$ ../configure --target-list=x86_64-softmmu,aarch64-softmmu ...
$ make check-migration
...
36/469 qemu:migration / /x86_64/migration/precopy/unix/plain                       OK    34.25s   1 subtests passed
37/469 qemu:migration / /x86_64/migration/multifd/tcp/tls/x509/default-host        OK     7.33s   1 subtests passed
39/469 qemu:migration / /x86_64/migration/multifd/tcp/tls/x509/allow-anon-client   OK     7.32s   1 subtests passed
40/469 qemu:migration / /aarch64/migration/postcopy/compress/plain                 SKIP   0.04s
41/469 qemu:migration / /aarch64/migration/postcopy/recovery/compress/plain        SKIP   0.04s
42/469 qemu:migration / /aarch64/migration/bad_dest                                OK     0.65s   1 subtests passed

Signed-off-by: Fabiano Rosas <farosas@suse.de>

tests/qtest/gen_migration_tests_list.py

@@ -0,0 +1,12 @@
+#!/usr/bin/env python3
+
+import re
+import sys
+
+file_path = sys.argv[1]
+
+with open(file_path, 'r') as f:
+    for line in f.readlines():
+        match = re.search('\"(/migration/.*)\"', line)
+        if match:
+            print(match.groups()[0])

tests/qtest/meson.build

@@ -369,14 +369,36 @@ foreach dir : target_dirs
         test: executable(test, src, dependencies: deps)
       }
     endif
-    test('qtest-@0@/@1@'.format(target_base, test),
-         qtest_executables[test],
-         depends: [test_deps, qtest_emulator, emulator_modules],
-         env: qtest_env,
-         args: ['--tap', '-k'],
-         protocol: 'tap',
-         timeout: slow_qtests.get(test, 30),
-         priority: slow_qtests.get(test, 30),
-         suite: ['qtest', 'qtest-' + target_base])
+
+    migtest = 'migration-test'
+    if test == migtest
+      migtests = run_command(python, files('gen_migration_tests_list.py'),
+                             meson.current_source_dir() / 'migration-test.c',
+                             check: true)
+
+      foreach item : migtests.stdout().strip().split('\n')
+        testname = '/@0@@1@'.format(target_base, item)
+
+        test(testname,
+             qtest_executables['migration-test'],
+             depends: [test_deps, qtest_emulator, emulator_modules],
+             env: qtest_env,
+             args: ['-k', '-p', testname],
+             protocol: 'tap',
+             timeout: slow_qtests.get(migtest),
+             priority: slow_qtests.get(migtest),
+             suite: ['migration'])
+      endforeach
+    else
+      test('qtest-@0@/@1@'.format(target_base, test),
+           qtest_executables[test],
+           depends: [test_deps, qtest_emulator, emulator_modules],
+           env: qtest_env,
+           args: ['--tap', '-k'],
+           protocol: 'tap',
+           timeout: slow_qtests.get(test, 30),
+           priority: slow_qtests.get(test, 30),
+           suite: ['qtest', 'qtest-' + target_base])
+      endif
   endforeach
 endforeach