tests/qtest: Add a function to check whether a machine is available

It is nowadays possible to build QEMU with a reduced set of machines
in each binary. However, the qtests still hard-code the expected
machines and fail if the binary does not feature the required machine.
Let's get a little bit more flexible here: Add a function that can be
used to query whether a certain machine is available or not, and use
it in some tests as an example (more work has to be done in other
tests which will follow later).

Message-Id: <20211201104347.51922-5-thuth@redhat.com>
Acked-by: John Snow <jsnow@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/tests/qtest/cdrom-test.c b/tests/qtest/cdrom-test.c
index 5af944a5fb..c1fcac5c45 100644
--- a/tests/qtest/cdrom-test.c
+++ b/tests/qtest/cdrom-test.c
@@ -109,9 +109,11 @@ static void test_cdrom_param(gconstpointer data)
 static void add_cdrom_param_tests(const char **machines)
 {
     while (*machines) {
-        char *testname = g_strdup_printf("cdrom/param/%s", *machines);
-        qtest_add_data_func(testname, *machines, test_cdrom_param);
-        g_free(testname);
+        if (qtest_has_machine(*machines)) {
+            char *testname = g_strdup_printf("cdrom/param/%s", *machines);
+            qtest_add_data_func(testname, *machines, test_cdrom_param);
+            g_free(testname);
+        }
         machines++;
     }
 }