tests/check-qobject.c

   1 /*
   2  * Generic QObject unit-tests.
   3  *
   4  * Copyright (C) 2017 Red Hat Inc.
   5  *
   6  * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
   7  * See the COPYING.LIB file in the top-level directory.
   8  */
   9
  10 #include "qemu/osdep.h"
  11 #include "block/qdict.h"
  12 #include "qapi/qmp/qbool.h"
  13 #include "qapi/qmp/qdict.h"
  14 #include "qapi/qmp/qlist.h"
  15 #include "qapi/qmp/qnull.h"
  16 #include "qapi/qmp/qnum.h"
  17 #include "qapi/qmp/qstring.h"
  18 #include "qemu-common.h"
  19
  20 #include <math.h>
  21
  22 /* Marks the end of the test_equality() argument list.
  23  * We cannot use NULL there because that is a valid argument. */
  24 static QObject test_equality_end_of_arguments;
  25
  26 /**
  27  * Test whether all variadic QObject *arguments are equal (@expected
  28  * is true) or whether they are all not equal (@expected is false).
  29  * Every QObject is tested to be equal to itself (to test
  30  * reflexivity), all tests are done both ways (to test symmetry), and
  31  * transitivity is not assumed but checked (each object is compared to
  32  * every other one).
  33  *
  34  * Note that qobject_is_equal() is not really an equivalence relation,
  35  * so this function may not be used for all objects (reflexivity is
  36  * not guaranteed, e.g. in the case of a QNum containing NaN).
  37  *
  38  * The @_ argument is required because a boolean may not be the last
  39  * argument before a variadic argument list (C11 7.16.1.4 para. 4).
  40  */
  41 static void do_test_equality(bool expected, int _, ...)
  42 {
  43     va_list ap_count, ap_extract;
  44     QObject **args;
  45     int arg_count = 0;
  46     int i, j;
  47
  48     va_start(ap_count, _);
  49     va_copy(ap_extract, ap_count);
  50     while (va_arg(ap_count, QObject *) != &test_equality_end_of_arguments) {
  51         arg_count++;
  52     }
  53     va_end(ap_count);
  54
  55     args = g_new(QObject *, arg_count);
  56     for (i = 0; i < arg_count; i++) {
  57         args[i] = va_arg(ap_extract, QObject *);
  58     }
  59     va_end(ap_extract);
  60
  61     for (i = 0; i < arg_count; i++) {
  62         g_assert(qobject_is_equal(args[i], args[i]) == true);
  63
  64         for (j = i + 1; j < arg_count; j++) {
  65             g_assert(qobject_is_equal(args[i], args[j]) == expected);
  66         }
  67     }
  68
  69     g_free(args);
  70 }
  71
  72 #define check_equal(...) \
  73     do_test_equality(true, 0, __VA_ARGS__, &test_equality_end_of_arguments)
  74 #define check_unequal(...) \
  75     do_test_equality(false, 0, __VA_ARGS__, &test_equality_end_of_arguments)
  76
  77 static void do_free_all(int _, ...)
  78 {
  79     va_list ap;
  80     QObject *obj;
  81
  82     va_start(ap, _);
  83     while ((obj = va_arg(ap, QObject *)) != NULL) {
  84         qobject_unref(obj);
  85     }
  86     va_end(ap);
  87 }
  88
  89 #define free_all(...) \
  90     do_free_all(0, __VA_ARGS__, NULL)
  91
  92 static void qobject_is_equal_null_test(void)
  93 {
  94     check_unequal(qnull(), NULL);
  95 }
  96
  97 static void qobject_is_equal_num_test(void)
  98 {
  99     QNum *u0, *i0, *d0, *dnan, *um42, *im42, *dm42;
 100
 101     u0 = qnum_from_uint(0u);
 102     i0 = qnum_from_int(0);
 103     d0 = qnum_from_double(0.0);
 104     dnan = qnum_from_double(NAN);
 105     um42 = qnum_from_uint((uint64_t)-42);
 106     im42 = qnum_from_int(-42);
 107     dm42 = qnum_from_double(-42.0);
 108
 109     /* Integers representing a mathematically equal number should
 110      * compare equal */
 111     check_equal(u0, i0);
 112     /* Doubles, however, are always unequal to integers */
 113     check_unequal(u0, d0);
 114     check_unequal(i0, d0);
 115
 116     /* Do not assume any object is equal to itself -- note however
 117      * that NaN cannot occur in a JSON object anyway. */
 118     g_assert(qobject_is_equal(QOBJECT(dnan), QOBJECT(dnan)) == false);
 119
 120     /* No unsigned overflow */
 121     check_unequal(um42, im42);
 122     check_unequal(um42, dm42);
 123     check_unequal(im42, dm42);
 124
 125     free_all(u0, i0, d0, dnan, um42, im42, dm42);
 126 }
 127
 128 static void qobject_is_equal_bool_test(void)
 129 {
 130     QBool *btrue_0, *btrue_1, *bfalse_0, *bfalse_1;
 131
 132     btrue_0 = qbool_from_bool(true);
 133     btrue_1 = qbool_from_bool(true);
 134     bfalse_0 = qbool_from_bool(false);
 135     bfalse_1 = qbool_from_bool(false);
 136
 137     check_equal(btrue_0, btrue_1);
 138     check_equal(bfalse_0, bfalse_1);
 139     check_unequal(btrue_0, bfalse_0);
 140
 141     free_all(btrue_0, btrue_1, bfalse_0, bfalse_1);
 142 }
 143
 144 static void qobject_is_equal_string_test(void)
 145 {
 146     QString *str_base, *str_whitespace_0, *str_whitespace_1, *str_whitespace_2;
 147     QString *str_whitespace_3, *str_case, *str_built;
 148
 149     str_base = qstring_from_str("foo");
 150     str_whitespace_0 = qstring_from_str(" foo");
 151     str_whitespace_1 = qstring_from_str("foo ");
 152     str_whitespace_2 = qstring_from_str("foo\b");
 153     str_whitespace_3 = qstring_from_str("fooo\b");
 154     str_case = qstring_from_str("Foo");
 155
 156     /* Should yield "foo" */
 157     str_built = qstring_from_substr("form", 0, 2);
 158     qstring_append_chr(str_built, 'o');
 159
 160     check_unequal(str_base, str_whitespace_0, str_whitespace_1,
 161                   str_whitespace_2, str_whitespace_3, str_case);
 162
 163     check_equal(str_base, str_built);
 164
 165     free_all(str_base, str_whitespace_0, str_whitespace_1, str_whitespace_2,
 166              str_whitespace_3, str_case, str_built);
 167 }
 168
 169 static void qobject_is_equal_list_test(void)
 170 {
 171     QList *list_0, *list_1, *list_cloned;
 172     QList *list_reordered, *list_longer, *list_shorter;
 173
 174     list_0 = qlist_new();
 175     list_1 = qlist_new();
 176     list_reordered = qlist_new();
 177     list_longer = qlist_new();
 178     list_shorter = qlist_new();
 179
 180     qlist_append_int(list_0, 1);
 181     qlist_append_int(list_0, 2);
 182     qlist_append_int(list_0, 3);
 183
 184     qlist_append_int(list_1, 1);
 185     qlist_append_int(list_1, 2);
 186     qlist_append_int(list_1, 3);
 187
 188     qlist_append_int(list_reordered, 1);
 189     qlist_append_int(list_reordered, 3);
 190     qlist_append_int(list_reordered, 2);
 191
 192     qlist_append_int(list_longer, 1);
 193     qlist_append_int(list_longer, 2);
 194     qlist_append_int(list_longer, 3);
 195     qlist_append_null(list_longer);
 196
 197     qlist_append_int(list_shorter, 1);
 198     qlist_append_int(list_shorter, 2);
 199
 200     list_cloned = qlist_copy(list_0);
 201
 202     check_equal(list_0, list_1, list_cloned);
 203     check_unequal(list_0, list_reordered, list_longer, list_shorter);
 204
 205     /* With a NaN in it, the list should no longer compare equal to
 206      * itself */
 207     qlist_append(list_0, qnum_from_double(NAN));
 208     g_assert(qobject_is_equal(QOBJECT(list_0), QOBJECT(list_0)) == false);
 209
 210     free_all(list_0, list_1, list_cloned, list_reordered, list_longer,
 211              list_shorter);
 212 }
 213
 214 static void qobject_is_equal_dict_test(void)
 215 {
 216     Error *local_err = NULL;
 217     QDict *dict_0, *dict_1, *dict_cloned;
 218     QDict *dict_different_key, *dict_different_value, *dict_different_null_key;
 219     QDict *dict_longer, *dict_shorter, *dict_nested;
 220     QDict *dict_crumpled;
 221
 222     dict_0 = qdict_new();
 223     dict_1 = qdict_new();
 224     dict_different_key = qdict_new();
 225     dict_different_value = qdict_new();
 226     dict_different_null_key = qdict_new();
 227     dict_longer = qdict_new();
 228     dict_shorter = qdict_new();
 229     dict_nested = qdict_new();
 230
 231     qdict_put_int(dict_0, "f.o", 1);
 232     qdict_put_int(dict_0, "bar", 2);
 233     qdict_put_int(dict_0, "baz", 3);
 234     qdict_put_null(dict_0, "null");
 235
 236     qdict_put_int(dict_1, "f.o", 1);
 237     qdict_put_int(dict_1, "bar", 2);
 238     qdict_put_int(dict_1, "baz", 3);
 239     qdict_put_null(dict_1, "null");
 240
 241     qdict_put_int(dict_different_key, "F.o", 1);
 242     qdict_put_int(dict_different_key, "bar", 2);
 243     qdict_put_int(dict_different_key, "baz", 3);
 244     qdict_put_null(dict_different_key, "null");
 245
 246     qdict_put_int(dict_different_value, "f.o", 42);
 247     qdict_put_int(dict_different_value, "bar", 2);
 248     qdict_put_int(dict_different_value, "baz", 3);
 249     qdict_put_null(dict_different_value, "null");
 250
 251     qdict_put_int(dict_different_null_key, "f.o", 1);
 252     qdict_put_int(dict_different_null_key, "bar", 2);
 253     qdict_put_int(dict_different_null_key, "baz", 3);
 254     qdict_put_null(dict_different_null_key, "none");
 255
 256     qdict_put_int(dict_longer, "f.o", 1);
 257     qdict_put_int(dict_longer, "bar", 2);
 258     qdict_put_int(dict_longer, "baz", 3);
 259     qdict_put_int(dict_longer, "xyz", 4);
 260     qdict_put_null(dict_longer, "null");
 261
 262     qdict_put_int(dict_shorter, "f.o", 1);
 263     qdict_put_int(dict_shorter, "bar", 2);
 264     qdict_put_int(dict_shorter, "baz", 3);
 265
 266     qdict_put(dict_nested, "f", qdict_new());
 267     qdict_put_int(qdict_get_qdict(dict_nested, "f"), "o", 1);
 268     qdict_put_int(dict_nested, "bar", 2);
 269     qdict_put_int(dict_nested, "baz", 3);
 270     qdict_put_null(dict_nested, "null");
 271
 272     dict_cloned = qdict_clone_shallow(dict_0);
 273
 274     check_equal(dict_0, dict_1, dict_cloned);
 275     check_unequal(dict_0, dict_different_key, dict_different_value,
 276                   dict_different_null_key, dict_longer, dict_shorter,
 277                   dict_nested);
 278
 279     dict_crumpled = qobject_to(QDict, qdict_crumple(dict_1, &local_err));
 280     g_assert(!local_err);
 281     check_equal(dict_crumpled, dict_nested);
 282
 283     qdict_flatten(dict_nested);
 284     check_equal(dict_0, dict_nested);
 285
 286     /* Containing an NaN value will make this dict compare unequal to
 287      * itself */
 288     qdict_put(dict_0, "NaN", qnum_from_double(NAN));
 289     g_assert(qobject_is_equal(QOBJECT(dict_0), QOBJECT(dict_0)) == false);
 290
 291     free_all(dict_0, dict_1, dict_cloned, dict_different_key,
 292              dict_different_value, dict_different_null_key, dict_longer,
 293              dict_shorter, dict_nested, dict_crumpled);
 294 }
 295
 296 static void qobject_is_equal_conversion_test(void)
 297 {
 298     QNum *u0, *i0, *d0;
 299     QString *s0, *s_empty;
 300     QBool *bfalse;
 301
 302     u0 = qnum_from_uint(0u);
 303     i0 = qnum_from_int(0);
 304     d0 = qnum_from_double(0.0);
 305     s0 = qstring_from_str("0");
 306     s_empty = qstring_new();
 307     bfalse = qbool_from_bool(false);
 308
 309     /* No automatic type conversion */
 310     check_unequal(u0, s0, s_empty, bfalse, qnull(), NULL);
 311     check_unequal(i0, s0, s_empty, bfalse, qnull(), NULL);
 312     check_unequal(d0, s0, s_empty, bfalse, qnull(), NULL);
 313
 314     free_all(u0, i0, d0, s0, s_empty, bfalse);
 315 }
 316
 317 int main(int argc, char **argv)
 318 {
 319     g_test_init(&argc, &argv, NULL);
 320
 321     g_test_add_func("/public/qobject_is_equal_null",
 322                     qobject_is_equal_null_test);
 323     g_test_add_func("/public/qobject_is_equal_num", qobject_is_equal_num_test);
 324     g_test_add_func("/public/qobject_is_equal_bool",
 325                     qobject_is_equal_bool_test);
 326     g_test_add_func("/public/qobject_is_equal_string",
 327                     qobject_is_equal_string_test);
 328     g_test_add_func("/public/qobject_is_equal_list",
 329                     qobject_is_equal_list_test);
 330     g_test_add_func("/public/qobject_is_equal_dict",
 331                     qobject_is_equal_dict_test);
 332     g_test_add_func("/public/qobject_is_equal_conversion",
 333                     qobject_is_equal_conversion_test);
 334
 335     return g_test_run();
 336 }