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qemu/tests/test-qmp-input-visitor.c
Markus Armbruster 297a3646c2 qapi: Replace uncommon use of the error API by the common one 
We commonly use the error API like this:

    err = NULL;
    foo(..., &err);
    if (err) {
        goto out;
    }
    bar(..., &err);

Every error source is checked separately.  The second function is only
called when the first one succeeds.  Both functions are free to pass
their argument to error_set().  Because error_set() asserts no error
has been set, this effectively means they must not be called with an
error set.

The qapi-generated code uses the error API differently:

    // *errp was initialized to NULL somewhere up the call chain
    frob(..., errp);
    gnat(..., errp);

Errors accumulate in *errp: first error wins, subsequent errors get
dropped.  To make this work, the second function does nothing when
called with an error set.  Requires non-null errp, or else the second
function can't see the first one fail.

This usage has also bled into visitor tests, and two device model
object property getters rtc_get_date() and balloon_stats_get_all().

With the "accumulate" technique, you need fewer error checks in
callers, and buy that with an error check in every callee.  Can be
nice.

However, mixing the two techniques is confusing.  You can't use the
"accumulate" technique with functions designed for the "check
separately" technique.  You can use the "check separately" technique
with functions designed for the "accumulate" technique, but then
error_set() can't catch you setting an error more than once.

Standardize on the "check separately" technique for now, because it's
overwhelmingly prevalent.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2014-05-15 14:00:46 -04:00

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/*
* QMP Input Visitor unit-tests.
*
* Copyright (C) 2011 Red Hat Inc.
*
* Authors:
* Luiz Capitulino <lcapitulino@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 <glib.h>
#include <stdarg.h>
#include "qemu-common.h"
#include "qapi/qmp-input-visitor.h"
#include "test-qapi-types.h"
#include "test-qapi-visit.h"
#include "qapi/qmp/types.h"
typedef struct TestInputVisitorData {
QObject *obj;
QmpInputVisitor *qiv;
} TestInputVisitorData;
static void visitor_input_teardown(TestInputVisitorData *data,
const void *unused)
{
qobject_decref(data->obj);
data->obj = NULL;
if (data->qiv) {
qmp_input_visitor_cleanup(data->qiv);
data->qiv = NULL;
}
}
/* This is provided instead of a test setup function so that the JSON
string used by the tests are kept in the test functions (and not
int main()) */
static GCC_FMT_ATTR(2, 3)
Visitor *visitor_input_test_init(TestInputVisitorData *data,
const char *json_string, ...)
{
Visitor *v;
va_list ap;
va_start(ap, json_string);
data->obj = qobject_from_jsonv(json_string, &ap);
va_end(ap);
g_assert(data->obj != NULL);
data->qiv = qmp_input_visitor_new(data->obj);
g_assert(data->qiv != NULL);
v = qmp_input_get_visitor(data->qiv);
g_assert(v != NULL);
return v;
}
/* similar to visitor_input_test_init(), but does not expect a string
* literal/format json_string argument and so can be used for
* programatically generated strings (and we can't pass in programatically
* generated strings via %s format parameters since qobject_from_jsonv()
* will wrap those in double-quotes and treat the entire object as a
* string)
*/
static Visitor *visitor_input_test_init_raw(TestInputVisitorData *data,
const char *json_string)
{
Visitor *v;
data->obj = qobject_from_json(json_string);
g_assert(data->obj != NULL);
data->qiv = qmp_input_visitor_new(data->obj);
g_assert(data->qiv != NULL);
v = qmp_input_get_visitor(data->qiv);
g_assert(v != NULL);
return v;
}
static void test_visitor_in_int(TestInputVisitorData *data,
const void *unused)
{
int64_t res = 0, value = -42;
Error *err = NULL;
Visitor *v;
v = visitor_input_test_init(data, "%" PRId64, value);
visit_type_int(v, &res, NULL, &err);
g_assert(!err);
g_assert_cmpint(res, ==, value);
}
static void test_visitor_in_int_overflow(TestInputVisitorData *data,
const void *unused)
{
int64_t res = 0;
Error *err = NULL;
Visitor *v;
/* this will overflow a Qint/int64, so should be deserialized into
* a QFloat/double field instead, leading to an error if we pass it
* to visit_type_int. confirm this.
*/
v = visitor_input_test_init(data, "%f", DBL_MAX);
visit_type_int(v, &res, NULL, &err);
g_assert(err);
error_free(err);
}
static void test_visitor_in_bool(TestInputVisitorData *data,
const void *unused)
{
Error *err = NULL;
bool res = false;
Visitor *v;
v = visitor_input_test_init(data, "true");
visit_type_bool(v, &res, NULL, &err);
g_assert(!err);
g_assert_cmpint(res, ==, true);
}
static void test_visitor_in_number(TestInputVisitorData *data,
const void *unused)
{
double res = 0, value = 3.14;
Error *err = NULL;
Visitor *v;
v = visitor_input_test_init(data, "%f", value);
visit_type_number(v, &res, NULL, &err);
g_assert(!err);
g_assert_cmpfloat(res, ==, value);
}
static void test_visitor_in_string(TestInputVisitorData *data,
const void *unused)
{
char *res = NULL, *value = (char *) "Q E M U";
Error *err = NULL;
Visitor *v;
v = visitor_input_test_init(data, "%s", value);
visit_type_str(v, &res, NULL, &err);
g_assert(!err);
g_assert_cmpstr(res, ==, value);
g_free(res);
}
static void test_visitor_in_enum(TestInputVisitorData *data,
const void *unused)
{
Error *err = NULL;
Visitor *v;
EnumOne i;
for (i = 0; EnumOne_lookup[i]; i++) {
EnumOne res = -1;
v = visitor_input_test_init(data, "%s", EnumOne_lookup[i]);
visit_type_EnumOne(v, &res, NULL, &err);
g_assert(!err);
g_assert_cmpint(i, ==, res);
visitor_input_teardown(data, NULL);
}
data->obj = NULL;
data->qiv = NULL;
}
typedef struct TestStruct
{
int64_t integer;
bool boolean;
char *string;
} TestStruct;
static void visit_type_TestStruct(Visitor *v, TestStruct **obj,
const char *name, Error **errp)
{
Error *err = NULL;
visit_start_struct(v, (void **)obj, "TestStruct", name, sizeof(TestStruct),
&err);
if (err) {
goto out;
}
visit_type_int(v, &(*obj)->integer, "integer", &err);
if (err) {
goto out_end;
}
visit_type_bool(v, &(*obj)->boolean, "boolean", &err);
if (err) {
goto out_end;
}
visit_type_str(v, &(*obj)->string, "string", &err);
out_end:
error_propagate(errp, err);
err = NULL;
visit_end_struct(v, &err);
out:
error_propagate(errp, err);
}
static void test_visitor_in_struct(TestInputVisitorData *data,
const void *unused)
{
TestStruct *p = NULL;
Error *err = NULL;
Visitor *v;
v = visitor_input_test_init(data, "{ 'integer': -42, 'boolean': true, 'string': 'foo' }");
visit_type_TestStruct(v, &p, NULL, &err);
g_assert(!err);
g_assert_cmpint(p->integer, ==, -42);
g_assert(p->boolean == true);
g_assert_cmpstr(p->string, ==, "foo");
g_free(p->string);
g_free(p);
}
static void check_and_free_str(char *str, const char *cmp)
{
g_assert_cmpstr(str, ==, cmp);
g_free(str);
}
static void test_visitor_in_struct_nested(TestInputVisitorData *data,
const void *unused)
{
UserDefNested *udp = NULL;
Error *err = NULL;
Visitor *v;
v = visitor_input_test_init(data, "{ 'string0': 'string0', 'dict1': { 'string1': 'string1', 'dict2': { 'userdef1': { 'integer': 42, 'string': 'string' }, 'string2': 'string2'}}}");
visit_type_UserDefNested(v, &udp, NULL, &err);
g_assert(!err);
check_and_free_str(udp->string0, "string0");
check_and_free_str(udp->dict1.string1, "string1");
g_assert_cmpint(udp->dict1.dict2.userdef1->base->integer, ==, 42);
check_and_free_str(udp->dict1.dict2.userdef1->string, "string");
check_and_free_str(udp->dict1.dict2.string2, "string2");
g_assert(udp->dict1.has_dict3 == false);
g_free(udp->dict1.dict2.userdef1);
g_free(udp);
}
static void test_visitor_in_list(TestInputVisitorData *data,
const void *unused)
{
UserDefOneList *item, *head = NULL;
Error *err = NULL;
Visitor *v;
int i;
v = visitor_input_test_init(data, "[ { 'string': 'string0', 'integer': 42 }, { 'string': 'string1', 'integer': 43 }, { 'string': 'string2', 'integer': 44 } ]");
visit_type_UserDefOneList(v, &head, NULL, &err);
g_assert(!err);
g_assert(head != NULL);
for (i = 0, item = head; item; item = item->next, i++) {
char string[12];
snprintf(string, sizeof(string), "string%d", i);
g_assert_cmpstr(item->value->string, ==, string);
g_assert_cmpint(item->value->base->integer, ==, 42 + i);
}
qapi_free_UserDefOneList(head);
}
static void test_visitor_in_union(TestInputVisitorData *data,
const void *unused)
{
Visitor *v;
Error *err = NULL;
UserDefUnion *tmp;
v = visitor_input_test_init(data, "{ 'type': 'b', 'integer': 41, 'data' : { 'integer': 42 } }");
visit_type_UserDefUnion(v, &tmp, NULL, &err);
g_assert(err == NULL);
g_assert_cmpint(tmp->kind, ==, USER_DEF_UNION_KIND_B);
g_assert_cmpint(tmp->integer, ==, 41);
g_assert_cmpint(tmp->b->integer, ==, 42);
qapi_free_UserDefUnion(tmp);
}
static void test_visitor_in_union_flat(TestInputVisitorData *data,
const void *unused)
{
Visitor *v;
Error *err = NULL;
UserDefFlatUnion *tmp;
v = visitor_input_test_init(data,
"{ 'enum1': 'value1', "
"'string': 'str', "
"'boolean': true }");
/* TODO when generator bug is fixed, add 'integer': 41 */
visit_type_UserDefFlatUnion(v, &tmp, NULL, &err);
g_assert(err == NULL);
g_assert_cmpint(tmp->kind, ==, ENUM_ONE_VALUE1);
g_assert_cmpstr(tmp->string, ==, "str");
/* TODO g_assert_cmpint(tmp->integer, ==, 41); */
g_assert_cmpint(tmp->value1->boolean, ==, true);
qapi_free_UserDefFlatUnion(tmp);
}
static void test_visitor_in_union_anon(TestInputVisitorData *data,
const void *unused)
{
Visitor *v;
Error *err = NULL;
UserDefAnonUnion *tmp;
v = visitor_input_test_init(data, "42");
visit_type_UserDefAnonUnion(v, &tmp, NULL, &err);
g_assert(err == NULL);
g_assert_cmpint(tmp->kind, ==, USER_DEF_ANON_UNION_KIND_I);
g_assert_cmpint(tmp->i, ==, 42);
qapi_free_UserDefAnonUnion(tmp);
}
static void test_native_list_integer_helper(TestInputVisitorData *data,
const void *unused,
UserDefNativeListUnionKind kind)
{
UserDefNativeListUnion *cvalue = NULL;
Error *err = NULL;
Visitor *v;
GString *gstr_list = g_string_new("");
GString *gstr_union = g_string_new("");
int i;
for (i = 0; i < 32; i++) {
g_string_append_printf(gstr_list, "%d", i);
if (i != 31) {
g_string_append(gstr_list, ", ");
}
}
g_string_append_printf(gstr_union, "{ 'type': '%s', 'data': [ %s ] }",
UserDefNativeListUnionKind_lookup[kind],
gstr_list->str);
v = visitor_input_test_init_raw(data, gstr_union->str);
visit_type_UserDefNativeListUnion(v, &cvalue, NULL, &err);
g_assert(err == NULL);
g_assert(cvalue != NULL);
g_assert_cmpint(cvalue->kind, ==, kind);
switch (kind) {
case USER_DEF_NATIVE_LIST_UNION_KIND_INTEGER: {
intList *elem = NULL;
for (i = 0, elem = cvalue->integer; elem; elem = elem->next, i++) {
g_assert_cmpint(elem->value, ==, i);
}
break;
}
case USER_DEF_NATIVE_LIST_UNION_KIND_S8: {
int8List *elem = NULL;
for (i = 0, elem = cvalue->s8; elem; elem = elem->next, i++) {
g_assert_cmpint(elem->value, ==, i);
}
break;
}
case USER_DEF_NATIVE_LIST_UNION_KIND_S16: {
int16List *elem = NULL;
for (i = 0, elem = cvalue->s16; elem; elem = elem->next, i++) {
g_assert_cmpint(elem->value, ==, i);
}
break;
}
case USER_DEF_NATIVE_LIST_UNION_KIND_S32: {
int32List *elem = NULL;
for (i = 0, elem = cvalue->s32; elem; elem = elem->next, i++) {
g_assert_cmpint(elem->value, ==, i);
}
break;
}
case USER_DEF_NATIVE_LIST_UNION_KIND_S64: {
int64List *elem = NULL;
for (i = 0, elem = cvalue->s64; elem; elem = elem->next, i++) {
g_assert_cmpint(elem->value, ==, i);
}
break;
}
case USER_DEF_NATIVE_LIST_UNION_KIND_U8: {
uint8List *elem = NULL;
for (i = 0, elem = cvalue->u8; elem; elem = elem->next, i++) {
g_assert_cmpint(elem->value, ==, i);
}
break;
}
case USER_DEF_NATIVE_LIST_UNION_KIND_U16: {
uint16List *elem = NULL;
for (i = 0, elem = cvalue->u16; elem; elem = elem->next, i++) {
g_assert_cmpint(elem->value, ==, i);
}
break;
}
case USER_DEF_NATIVE_LIST_UNION_KIND_U32: {
uint32List *elem = NULL;
for (i = 0, elem = cvalue->u32; elem; elem = elem->next, i++) {
g_assert_cmpint(elem->value, ==, i);
}
break;
}
case USER_DEF_NATIVE_LIST_UNION_KIND_U64: {
uint64List *elem = NULL;
for (i = 0, elem = cvalue->u64; elem; elem = elem->next, i++) {
g_assert_cmpint(elem->value, ==, i);
}
break;
}
default:
g_assert_not_reached();
}
g_string_free(gstr_union, true);
g_string_free(gstr_list, true);
qapi_free_UserDefNativeListUnion(cvalue);
}
static void test_visitor_in_native_list_int(TestInputVisitorData *data,
const void *unused)
{
test_native_list_integer_helper(data, unused,
USER_DEF_NATIVE_LIST_UNION_KIND_INTEGER);
}
static void test_visitor_in_native_list_int8(TestInputVisitorData *data,
const void *unused)
{
test_native_list_integer_helper(data, unused,
USER_DEF_NATIVE_LIST_UNION_KIND_S8);
}
static void test_visitor_in_native_list_int16(TestInputVisitorData *data,
const void *unused)
{
test_native_list_integer_helper(data, unused,
USER_DEF_NATIVE_LIST_UNION_KIND_S16);
}
static void test_visitor_in_native_list_int32(TestInputVisitorData *data,
const void *unused)
{
test_native_list_integer_helper(data, unused,
USER_DEF_NATIVE_LIST_UNION_KIND_S32);
}
static void test_visitor_in_native_list_int64(TestInputVisitorData *data,
const void *unused)
{
test_native_list_integer_helper(data, unused,
USER_DEF_NATIVE_LIST_UNION_KIND_S64);
}
static void test_visitor_in_native_list_uint8(TestInputVisitorData *data,
const void *unused)
{
test_native_list_integer_helper(data, unused,
USER_DEF_NATIVE_LIST_UNION_KIND_U8);
}
static void test_visitor_in_native_list_uint16(TestInputVisitorData *data,
const void *unused)
{
test_native_list_integer_helper(data, unused,
USER_DEF_NATIVE_LIST_UNION_KIND_U16);
}
static void test_visitor_in_native_list_uint32(TestInputVisitorData *data,
const void *unused)
{
test_native_list_integer_helper(data, unused,
USER_DEF_NATIVE_LIST_UNION_KIND_U32);
}
static void test_visitor_in_native_list_uint64(TestInputVisitorData *data,
const void *unused)
{
test_native_list_integer_helper(data, unused,
USER_DEF_NATIVE_LIST_UNION_KIND_U64);
}
static void test_visitor_in_native_list_bool(TestInputVisitorData *data,
const void *unused)
{
UserDefNativeListUnion *cvalue = NULL;
boolList *elem = NULL;
Error *err = NULL;
Visitor *v;
GString *gstr_list = g_string_new("");
GString *gstr_union = g_string_new("");
int i;
for (i = 0; i < 32; i++) {
g_string_append_printf(gstr_list, "%s",
(i % 3 == 0) ? "true" : "false");
if (i != 31) {
g_string_append(gstr_list, ", ");
}
}
g_string_append_printf(gstr_union, "{ 'type': 'boolean', 'data': [ %s ] }",
gstr_list->str);
v = visitor_input_test_init_raw(data, gstr_union->str);
visit_type_UserDefNativeListUnion(v, &cvalue, NULL, &err);
g_assert(err == NULL);
g_assert(cvalue != NULL);
g_assert_cmpint(cvalue->kind, ==, USER_DEF_NATIVE_LIST_UNION_KIND_BOOLEAN);
for (i = 0, elem = cvalue->boolean; elem; elem = elem->next, i++) {
g_assert_cmpint(elem->value, ==, (i % 3 == 0) ? 1 : 0);
}
g_string_free(gstr_union, true);
g_string_free(gstr_list, true);
qapi_free_UserDefNativeListUnion(cvalue);
}
static void test_visitor_in_native_list_string(TestInputVisitorData *data,
const void *unused)
{
UserDefNativeListUnion *cvalue = NULL;
strList *elem = NULL;
Error *err = NULL;
Visitor *v;
GString *gstr_list = g_string_new("");
GString *gstr_union = g_string_new("");
int i;
for (i = 0; i < 32; i++) {
g_string_append_printf(gstr_list, "'%d'", i);
if (i != 31) {
g_string_append(gstr_list, ", ");
}
}
g_string_append_printf(gstr_union, "{ 'type': 'string', 'data': [ %s ] }",
gstr_list->str);
v = visitor_input_test_init_raw(data, gstr_union->str);
visit_type_UserDefNativeListUnion(v, &cvalue, NULL, &err);
g_assert(err == NULL);
g_assert(cvalue != NULL);
g_assert_cmpint(cvalue->kind, ==, USER_DEF_NATIVE_LIST_UNION_KIND_STRING);
for (i = 0, elem = cvalue->string; elem; elem = elem->next, i++) {
gchar str[8];
sprintf(str, "%d", i);
g_assert_cmpstr(elem->value, ==, str);
}
g_string_free(gstr_union, true);
g_string_free(gstr_list, true);
qapi_free_UserDefNativeListUnion(cvalue);
}
#define DOUBLE_STR_MAX 16
static void test_visitor_in_native_list_number(TestInputVisitorData *data,
const void *unused)
{
UserDefNativeListUnion *cvalue = NULL;
numberList *elem = NULL;
Error *err = NULL;
Visitor *v;
GString *gstr_list = g_string_new("");
GString *gstr_union = g_string_new("");
int i;
for (i = 0; i < 32; i++) {
g_string_append_printf(gstr_list, "%f", (double)i / 3);
if (i != 31) {
g_string_append(gstr_list, ", ");
}
}
g_string_append_printf(gstr_union, "{ 'type': 'number', 'data': [ %s ] }",
gstr_list->str);
v = visitor_input_test_init_raw(data, gstr_union->str);
visit_type_UserDefNativeListUnion(v, &cvalue, NULL, &err);
g_assert(err == NULL);
g_assert(cvalue != NULL);
g_assert_cmpint(cvalue->kind, ==, USER_DEF_NATIVE_LIST_UNION_KIND_NUMBER);
for (i = 0, elem = cvalue->number; elem; elem = elem->next, i++) {
GString *double_expected = g_string_new("");
GString *double_actual = g_string_new("");
g_string_printf(double_expected, "%.6f", (double)i / 3);
g_string_printf(double_actual, "%.6f", elem->value);
g_assert_cmpstr(double_expected->str, ==, double_actual->str);
g_string_free(double_expected, true);
g_string_free(double_actual, true);
}
g_string_free(gstr_union, true);
g_string_free(gstr_list, true);
qapi_free_UserDefNativeListUnion(cvalue);
}
static void input_visitor_test_add(const char *testpath,
TestInputVisitorData *data,
void (*test_func)(TestInputVisitorData *data, const void *user_data))
{
g_test_add(testpath, TestInputVisitorData, data, NULL, test_func,
visitor_input_teardown);
}
static void test_visitor_in_errors(TestInputVisitorData *data,
const void *unused)
{
TestStruct *p = NULL;
Error *err = NULL;
Visitor *v;
v = visitor_input_test_init(data, "{ 'integer': false, 'boolean': 'foo', 'string': -42 }");
visit_type_TestStruct(v, &p, NULL, &err);
g_assert(err);
g_assert(p->string == NULL);
error_free(err);
g_free(p->string);
g_free(p);
}
int main(int argc, char **argv)
{
TestInputVisitorData in_visitor_data;
g_test_init(&argc, &argv, NULL);
input_visitor_test_add("/visitor/input/int",
&in_visitor_data, test_visitor_in_int);
input_visitor_test_add("/visitor/input/int_overflow",
&in_visitor_data, test_visitor_in_int_overflow);
input_visitor_test_add("/visitor/input/bool",
&in_visitor_data, test_visitor_in_bool);
input_visitor_test_add("/visitor/input/number",
&in_visitor_data, test_visitor_in_number);
input_visitor_test_add("/visitor/input/string",
&in_visitor_data, test_visitor_in_string);
input_visitor_test_add("/visitor/input/enum",
&in_visitor_data, test_visitor_in_enum);
input_visitor_test_add("/visitor/input/struct",
&in_visitor_data, test_visitor_in_struct);
input_visitor_test_add("/visitor/input/struct-nested",
&in_visitor_data, test_visitor_in_struct_nested);
input_visitor_test_add("/visitor/input/list",
&in_visitor_data, test_visitor_in_list);
input_visitor_test_add("/visitor/input/union",
&in_visitor_data, test_visitor_in_union);
input_visitor_test_add("/visitor/input/union-flat",
&in_visitor_data, test_visitor_in_union_flat);
input_visitor_test_add("/visitor/input/union-anon",
&in_visitor_data, test_visitor_in_union_anon);
input_visitor_test_add("/visitor/input/errors",
&in_visitor_data, test_visitor_in_errors);
input_visitor_test_add("/visitor/input/native_list/int",
&in_visitor_data,
test_visitor_in_native_list_int);
input_visitor_test_add("/visitor/input/native_list/int8",
&in_visitor_data,
test_visitor_in_native_list_int8);
input_visitor_test_add("/visitor/input/native_list/int16",
&in_visitor_data,
test_visitor_in_native_list_int16);
input_visitor_test_add("/visitor/input/native_list/int32",
&in_visitor_data,
test_visitor_in_native_list_int32);
input_visitor_test_add("/visitor/input/native_list/int64",
&in_visitor_data,
test_visitor_in_native_list_int64);
input_visitor_test_add("/visitor/input/native_list/uint8",
&in_visitor_data,
test_visitor_in_native_list_uint8);
input_visitor_test_add("/visitor/input/native_list/uint16",
&in_visitor_data,
test_visitor_in_native_list_uint16);
input_visitor_test_add("/visitor/input/native_list/uint32",
&in_visitor_data,
test_visitor_in_native_list_uint32);
input_visitor_test_add("/visitor/input/native_list/uint64",
&in_visitor_data, test_visitor_in_native_list_uint64);
input_visitor_test_add("/visitor/input/native_list/bool",
&in_visitor_data, test_visitor_in_native_list_bool);
input_visitor_test_add("/visitor/input/native_list/str",
&in_visitor_data, test_visitor_in_native_list_string);
input_visitor_test_add("/visitor/input/native_list/number",
&in_visitor_data, test_visitor_in_native_list_number);
g_test_run();
return 0;
}
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