qmp-test: New, covering basic QMP protocol

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <1488544368-30622-4-git-send-email-armbru@redhat.com>

1 files changed, 139 insertions, 0 deletions

diff --git a/tests/qmp-test.c b/tests/qmp-test.c
new file mode 100644
index 0000000000..405e49ec34
--- /dev/null
+++ b/tests/qmp-test.c
@@ -0,0 +1,139 @@
+/*
+ * QMP protocol test cases
+ *
+ * Copyright (c) 2017 Red Hat Inc.
+ *
+ * Authors:
+ *  Markus Armbruster <armbru@redhat.com>,
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "libqtest.h"
+#include "qapi-visit.h"
+#include "qapi/error.h"
+#include "qapi/qobject-input-visitor.h"
+#include "qapi/visitor.h"
+
+const char common_args[] = "-nodefaults -machine none";
+
+static const char *get_error_class(QDict *resp)
+{
+    QDict *error = qdict_get_qdict(resp, "error");
+    const char *desc = qdict_get_try_str(error, "desc");
+
+    g_assert(desc);
+    return error ? qdict_get_try_str(error, "class") : NULL;
+}
+
+static void test_version(QObject *version)
+{
+    Visitor *v;
+    VersionInfo *vinfo;
+
+    g_assert(version);
+    v = qobject_input_visitor_new(version, true);
+    visit_type_VersionInfo(v, "version", &vinfo, &error_abort);
+    qapi_free_VersionInfo(vinfo);
+    visit_free(v);
+}
+
+static void test_malformed(void)
+{
+    QDict *resp;
+
+    /* Not even a dictionary */
+    resp = qmp("null");
+    g_assert_cmpstr(get_error_class(resp), ==, "GenericError");
+    QDECREF(resp);
+
+    /* No "execute" key */
+    resp = qmp("{}");
+    g_assert_cmpstr(get_error_class(resp), ==, "GenericError");
+    QDECREF(resp);
+
+    /* "execute" isn't a string */
+    resp = qmp("{ 'execute': true }");
+    g_assert_cmpstr(get_error_class(resp), ==, "GenericError");
+    QDECREF(resp);
+
+    /* "arguments" isn't a dictionary */
+    resp = qmp("{ 'execute': 'no-such-cmd', 'arguments': [] }");
+    g_assert_cmpstr(get_error_class(resp), ==, "GenericError");
+    QDECREF(resp);
+
+    /* extra key */
+    resp = qmp("{ 'execute': 'no-such-cmd', 'extra': true }");
+    g_assert_cmpstr(get_error_class(resp), ==, "GenericError");
+    QDECREF(resp);
+}
+
+static void test_qmp_protocol(void)
+{
+    QDict *resp, *q, *ret;
+    QList *capabilities;
+
+    global_qtest = qtest_init_without_qmp_handshake(common_args);
+
+    /* Test greeting */
+    resp = qmp_receive();
+    q = qdict_get_qdict(resp, "QMP");
+    g_assert(q);
+    test_version(qdict_get(q, "version"));
+    capabilities = qdict_get_qlist(q, "capabilities");
+    g_assert(capabilities && qlist_empty(capabilities));
+    QDECREF(resp);
+
+    /* Test valid command before handshake */
+    resp = qmp("{ 'execute': 'query-version' }");
+    g_assert_cmpstr(get_error_class(resp), ==, "CommandNotFound");
+    QDECREF(resp);
+
+    /* Test malformed commands before handshake */
+    test_malformed();
+
+    /* Test handshake */
+    resp = qmp("{ 'execute': 'qmp_capabilities' }");
+    ret = qdict_get_qdict(resp, "return");
+    g_assert(ret && !qdict_size(ret));
+    QDECREF(resp);
+
+    /* Test repeated handshake */
+    resp = qmp("{ 'execute': 'qmp_capabilities' }");
+    g_assert_cmpstr(get_error_class(resp), ==, "CommandNotFound");
+    QDECREF(resp);
+
+    /* Test valid command */
+    resp = qmp("{ 'execute': 'query-version' }");
+    test_version(qdict_get(resp, "return"));
+    QDECREF(resp);
+
+    /* Test malformed commands */
+    test_malformed();
+
+    /* Test 'id' */
+    resp = qmp("{ 'execute': 'query-name', 'id': 'cookie#1' }");
+    ret = qdict_get_qdict(resp, "return");
+    g_assert(ret);
+    g_assert_cmpstr(qdict_get_try_str(resp, "id"), ==, "cookie#1");
+    QDECREF(resp);
+
+    /* Test command failure with 'id' */
+    resp = qmp("{ 'execute': 'human-monitor-command', 'id': 2 }");
+    g_assert_cmpstr(get_error_class(resp), ==, "GenericError");
+    g_assert_cmpint(qdict_get_int(resp, "id"), ==, 2);
+    QDECREF(resp);
+
+    qtest_end();
+}
+
+int main(int argc, char *argv[])
+{
+    g_test_init(&argc, &argv, NULL);
+
+    qtest_add_func("qmp/protocol", test_qmp_protocol);
+
+    return g_test_run();
+}