tests/check-qom-proplist: Improve iterator coverage

The tests' "qemu-dummy" device has only class properties.  Turn one of
them into an instance property.  test_dummy_class_iterator() expects
one fewer property than test_dummy_iterator().  Rewrite
test_dummy_prop_iterator() to take expected properties as argument.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20200505152926.18877-9-armbru@redhat.com>

tests/check-qom-proplist.c

@@ -130,17 +130,18 @@ static void dummy_init(Object *obj)
     object_property_add_bool(obj, "bv",
                              dummy_get_bv,
                              dummy_set_bv,
-                             &err);
+                             NULL);
+    /* duplicate: */
+    object_property_add_str(obj, "sv",
+                            dummy_get_sv,
+                            dummy_set_sv,
+                            &err);
     error_free_or_abort(&err);
 }
 
 
 static void dummy_class_init(ObjectClass *cls, void *data)
 {
-    object_class_property_add_bool(cls, "bv",
-                                   dummy_get_bv,
-                                   dummy_set_bv,
-                                   NULL);
     object_class_property_add_str(cls, "sv",
                                   dummy_get_sv,
                                   dummy_set_sv,
@@ -520,34 +521,33 @@ static void test_dummy_getenum(void)
 }
 
 
-static void test_dummy_prop_iterator(ObjectPropertyIterator *iter)
+static void test_dummy_prop_iterator(ObjectPropertyIterator *iter,
+                                     const char *expected[], int n)
 {
-    bool seenbv = false, seensv = false, seenav = false, seentype = false;
     ObjectProperty *prop;
+    int i;
 
     while ((prop = object_property_iter_next(iter))) {
-        if (!seenbv && g_str_equal(prop->name, "bv")) {
+        for (i = 0; i < n; i++) {
-            seenbv = true;
+            if (!g_strcmp0(prop->name, expected[i])) {
-        } else if (!seensv && g_str_equal(prop->name, "sv")) {
+                break;
-            seensv = true;
+            }
-        } else if (!seenav && g_str_equal(prop->name, "av")) {
-            seenav = true;
-        } else if (!seentype && g_str_equal(prop->name, "type")) {
-            /* This prop comes from the base Object class */
-            seentype = true;
-        } else {
-            g_printerr("Found prop '%s'\n", prop->name);
-            g_assert_not_reached();
         }
+        g_assert(i < n);
+        expected[i] = NULL;
+    }
+
+    for (i = 0; i < n; i++) {
+        g_assert(!expected[i]);
     }
-    g_assert(seenbv);
-    g_assert(seenav);
-    g_assert(seensv);
-    g_assert(seentype);
 }
 
 static void test_dummy_iterator(void)
 {
+    const char *expected[] = {
+        "type",                 /* inherited from TYPE_OBJECT */
+        "sv", "av",             /* class properties */
+        "bv"};                  /* instance property */
     Object *parent = object_get_objects_root();
     DummyObject *dobj = DUMMY_OBJECT(
         object_new_with_props(TYPE_DUMMY,
@@ -561,17 +561,18 @@ static void test_dummy_iterator(void)
     ObjectPropertyIterator iter;
 
     object_property_iter_init(&iter, OBJECT(dobj));
-    test_dummy_prop_iterator(&iter);
+    test_dummy_prop_iterator(&iter, expected, ARRAY_SIZE(expected));
     object_unparent(OBJECT(dobj));
 }
 
 static void test_dummy_class_iterator(void)
 {
+    const char *expected[] = { "type", "av", "sv" };
     ObjectPropertyIterator iter;
     ObjectClass *klass = object_class_by_name(TYPE_DUMMY);
 
     object_class_property_iter_init(&iter, klass);
-    test_dummy_prop_iterator(&iter);
+    test_dummy_prop_iterator(&iter, expected, ARRAY_SIZE(expected));
 }
 
 static void test_dummy_delchild(void)