tests/qtest: Add a function that checks whether a device is available

Devices might not always be compiled into the QEMU target binaries.
We already have the libqos framework that is good for handling such
situations, but some of the qtests are not a real good fit for the
libqos framework. Let's add a qtest_has_device() function for such
tests instead.

Message-Id: <20211220081054.151515-2-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

diff --git a/tests/qtest/libqos/libqtest.h b/tests/qtest/libqos/libqtest.h
index a6d38d7ef7fbc7270a90ac054bab0b8f35e616c2..cf38d273f5c05af892b45111ede8e3a66e22df37 100644 (file)
--- a/tests/qtest/libqos/libqtest.h
+++ b/tests/qtest/libqos/libqtest.h
@@ -718,6 +718,14 @@ void qtest_cb_for_every_machine(void (*cb)(const char *machine),
  */
 bool qtest_has_machine(const char *machine);
 
+/**
+ * qtest_has_device:
+ * @device: The device to look for
+ *
+ * Returns: true if the device is available in the target binary.
+ */
+bool qtest_has_device(const char *device);
+
 /**
  * qtest_qmp_device_add_qdict:
  * @qts: QTestState instance to operate on

diff --git a/tests/qtest/libqtest.c b/tests/qtest/libqtest.c
index a68326caae98188b166358ed6ba3296856520514..41f4da4e54fc2a6c556bd2e4e002441f1b02605e 100644 (file)
--- a/tests/qtest/libqtest.c
+++ b/tests/qtest/libqtest.c
@@ -1418,6 +1418,50 @@ bool qtest_has_machine(const char *machine)
     return false;
 }
 
+bool qtest_has_device(const char *device)
+{
+    static QList *list;
+    const QListEntry *p;
+    QObject *qobj;
+    QString *qstr;
+    QDict *devinfo;
+    int idx;
+
+    if (!list) {
+        QDict *resp;
+        QDict *args;
+        QTestState *qts = qtest_init("-machine none");
+
+        args = qdict_new();
+        qdict_put_bool(args, "abstract", false);
+        qdict_put_str(args, "implements", "device");
+
+        resp = qtest_qmp(qts, "{'execute': 'qom-list-types', 'arguments': %p }",
+                         args);
+        g_assert(qdict_haskey(resp, "return"));
+        list = qdict_get_qlist(resp, "return");
+        qobject_ref(list);
+        qobject_unref(resp);
+
+        qtest_quit(qts);
+    }
+
+    for (p = qlist_first(list), idx = 0; p; p = qlist_next(p), idx++) {
+        devinfo = qobject_to(QDict, qlist_entry_obj(p));
+        g_assert(devinfo);
+
+        qobj = qdict_get(devinfo, "name");
+        g_assert(qobj);
+        qstr = qobject_to(QString, qobj);
+        g_assert(qstr);
+        if (g_str_equal(qstring_get_str(qstr), device)) {
+            return true;
+        }
+    }
+
+    return false;
+}
+
 /*
  * Generic hot-plugging test via the device_add QMP commands.
  */