tests/test-opts-visitor.c

   1 /*
   2  * Options Visitor unit-tests.
   3  *
   4  * Copyright (C) 2013 Red Hat, Inc.
   5  *
   6  * Authors:
   7  *   Laszlo Ersek <lersek@redhat.com> (based on test-string-output-visitor)
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  10  * See the COPYING file in the top-level directory.
  11  */
  12
  13 #include "qemu/osdep.h"
  14
  15 #include "qemu/config-file.h"     /* qemu_add_opts() */
  16 #include "qemu/option.h"          /* qemu_opts_parse() */
  17 #include "qapi/error.h"
  18 #include "qapi/opts-visitor.h"    /* opts_visitor_new() */
  19 #include "test-qapi-visit.h"      /* visit_type_UserDefOptions() */
  20
  21 static QemuOptsList userdef_opts = {
  22     .name = "userdef",
  23     .head = QTAILQ_HEAD_INITIALIZER(userdef_opts.head),
  24     .desc = { { 0 } } /* validated with OptsVisitor */
  25 };
  26
  27 /* fixture (= glib test case context) and test case manipulation */
  28
  29 typedef struct OptsVisitorFixture {
  30     UserDefOptions *userdef;
  31     Error *err;
  32 } OptsVisitorFixture;
  33
  34
  35 static void
  36 setup_fixture(OptsVisitorFixture *f, gconstpointer test_data)
  37 {
  38     const char *opts_string = test_data;
  39     QemuOpts *opts;
  40     Visitor *v;
  41
  42     opts = qemu_opts_parse(qemu_find_opts("userdef"), opts_string, false,
  43                            NULL);
  44     g_assert(opts != NULL);
  45
  46     v = opts_visitor_new(opts);
  47     visit_type_UserDefOptions(v, NULL, &f->userdef, &f->err);
  48     visit_free(v);
  49     qemu_opts_del(opts);
  50 }
  51
  52
  53 static void
  54 teardown_fixture(OptsVisitorFixture *f, gconstpointer test_data)
  55 {
  56     qapi_free_UserDefOptions(f->userdef);
  57     error_free(f->err);
  58 }
  59
  60
  61 static void
  62 add_test(const char *testpath,
  63          void (*test_func)(OptsVisitorFixture *f, gconstpointer test_data),
  64          gconstpointer test_data)
  65 {
  66     g_test_add(testpath, OptsVisitorFixture, test_data, setup_fixture,
  67                test_func, teardown_fixture);
  68 }
  69
  70 /* test output evaluation */
  71
  72 static void
  73 expect_ok(OptsVisitorFixture *f, gconstpointer test_data)
  74 {
  75     g_assert(f->err == NULL);
  76     g_assert(f->userdef != NULL);
  77 }
  78
  79
  80 static void
  81 expect_fail(OptsVisitorFixture *f, gconstpointer test_data)
  82 {
  83     g_assert(f->err != NULL);
  84
  85     /* The error message is printed when this test utility is invoked directly
  86      * (ie. without gtester) and the --verbose flag is passed:
  87      *
  88      * tests/test-opts-visitor --verbose
  89      */
  90     g_test_message("'%s': %s", (const char *)test_data,
  91                    error_get_pretty(f->err));
  92 }
  93
  94
  95 static void
  96 test_value(OptsVisitorFixture *f, gconstpointer test_data)
  97 {
  98     uint64_t magic, bitval;
  99     intList *i64;
 100     uint64List *u64;
 101     uint16List *u16;
 102
 103     expect_ok(f, test_data);
 104
 105     magic = 0;
 106     for (i64 = f->userdef->i64; i64 != NULL; i64 = i64->next) {
 107         g_assert(-16 <= i64->value && i64->value < 64-16);
 108         bitval = 1ull << (i64->value + 16);
 109         g_assert((magic & bitval) == 0);
 110         magic |= bitval;
 111     }
 112     g_assert(magic == 0xDEADBEEF);
 113
 114     magic = 0;
 115     for (u64 = f->userdef->u64; u64 != NULL; u64 = u64->next) {
 116         g_assert(u64->value < 64);
 117         bitval = 1ull << u64->value;
 118         g_assert((magic & bitval) == 0);
 119         magic |= bitval;
 120     }
 121     g_assert(magic == 0xBADC0FFEE0DDF00DULL);
 122
 123     magic = 0;
 124     for (u16 = f->userdef->u16; u16 != NULL; u16 = u16->next) {
 125         g_assert(u16->value < 64);
 126         bitval = 1ull << u16->value;
 127         g_assert((magic & bitval) == 0);
 128         magic |= bitval;
 129     }
 130     g_assert(magic == 0xD15EA5E);
 131 }
 132
 133
 134 static void
 135 expect_i64_min(OptsVisitorFixture *f, gconstpointer test_data)
 136 {
 137     expect_ok(f, test_data);
 138     g_assert(f->userdef->has_i64);
 139     g_assert(f->userdef->i64->next == NULL);
 140     g_assert(f->userdef->i64->value == INT64_MIN);
 141 }
 142
 143
 144 static void
 145 expect_i64_max(OptsVisitorFixture *f, gconstpointer test_data)
 146 {
 147     expect_ok(f, test_data);
 148     g_assert(f->userdef->has_i64);
 149     g_assert(f->userdef->i64->next == NULL);
 150     g_assert(f->userdef->i64->value == INT64_MAX);
 151 }
 152
 153
 154 static void
 155 expect_zero(OptsVisitorFixture *f, gconstpointer test_data)
 156 {
 157     expect_ok(f, test_data);
 158     g_assert(f->userdef->has_u64);
 159     g_assert(f->userdef->u64->next == NULL);
 160     g_assert(f->userdef->u64->value == 0);
 161 }
 162
 163
 164 static void
 165 expect_u64_max(OptsVisitorFixture *f, gconstpointer test_data)
 166 {
 167     expect_ok(f, test_data);
 168     g_assert(f->userdef->has_u64);
 169     g_assert(f->userdef->u64->next == NULL);
 170     g_assert(f->userdef->u64->value == UINT64_MAX);
 171 }
 172
 173 /* test cases */
 174
 175 static void
 176 test_opts_range_unvisited(void)
 177 {
 178     intList *list = NULL;
 179     intList *tail;
 180     QemuOpts *opts;
 181     Visitor *v;
 182
 183     opts = qemu_opts_parse(qemu_find_opts("userdef"), "ilist=0-2", false,
 184                            &error_abort);
 185
 186     v = opts_visitor_new(opts);
 187
 188     visit_start_struct(v, NULL, NULL, 0, &error_abort);
 189
 190     /* Would be simpler if the visitor genuinely supported virtual walks */
 191     visit_start_list(v, "ilist", (GenericList **)&list, sizeof(*list),
 192                      &error_abort);
 193     tail = list;
 194     visit_type_int(v, NULL, &tail->value, &error_abort);
 195     g_assert_cmpint(tail->value, ==, 0);
 196     tail = (intList *)visit_next_list(v, (GenericList *)tail, sizeof(*list));
 197     g_assert(tail);
 198     visit_type_int(v, NULL, &tail->value, &error_abort);
 199     g_assert_cmpint(tail->value, ==, 1);
 200     tail = (intList *)visit_next_list(v, (GenericList *)tail, sizeof(*list));
 201     g_assert(tail);
 202     visit_end_list(v, (void **)&list);
 203     /* BUG: unvisited tail not reported; actually not reportable by design */
 204
 205     visit_check_struct(v, &error_abort);
 206     visit_end_struct(v, NULL);
 207
 208     qapi_free_intList(list);
 209     visit_free(v);
 210     qemu_opts_del(opts);
 211 }
 212
 213 int
 214 main(int argc, char **argv)
 215 {
 216     g_test_init(&argc, &argv, NULL);
 217
 218     qemu_add_opts(&userdef_opts);
 219
 220     /* Three hexadecimal magic numbers, "dead beef", "bad coffee, odd food" and
 221      * "disease", from
 222      * <http://en.wikipedia.org/wiki/Magic_number_%28programming%29>, were
 223      * converted to binary and dissected into bit ranges. Each magic number is
 224      * going to be recomposed using the lists called "i64", "u64" and "u16",
 225      * respectively.
 226      *
 227      * (Note that these types pertain to the individual bit shift counts, not
 228      * the magic numbers themselves; the intent is to exercise opts_type_int()
 229      * and opts_type_uint64().)
 230      *
 231      * The "i64" shift counts have been decreased by 16 (decimal) in order to
 232      * test negative values as well. Finally, the full list of QemuOpt elements
 233      * has been permuted with "shuf".
 234      *
 235      * Both "i64" and "u64" have some (distinct) single-element ranges
 236      * represented as both "a" and "a-a". "u16" is a special case of "i64" (see
 237      * visit_type_uint16()), so it wouldn't add a separate test in this regard.
 238      */
 239
 240     add_test("/visitor/opts/flatten/value", &test_value,
 241              "i64=-1-0,u64=12-16,u64=2-3,i64=-11--9,u64=57,u16=9,i64=5-5,"
 242              "u16=1-4,u16=20,u64=63-63,i64=-16--13,u64=50-52,i64=14-15,u16=11,"
 243              "i64=7,u16=18,i64=2-3,u16=6,u64=54-55,u64=0,u64=18-20,u64=33-43,"
 244              "i64=9-12,u16=26-27,u64=59-61,u16=13-16,u64=29-31,u64=22-23,"
 245              "u16=24,i64=-7--3");
 246
 247     add_test("/visitor/opts/i64/val1/errno",    &expect_fail,
 248              "i64=0x8000000000000000");
 249     add_test("/visitor/opts/i64/val1/empty",    &expect_fail, "i64=");
 250     add_test("/visitor/opts/i64/val1/trailing", &expect_fail, "i64=5z");
 251     add_test("/visitor/opts/i64/nonlist",       &expect_fail, "i64x=5-6");
 252     add_test("/visitor/opts/i64/val2/errno",    &expect_fail,
 253              "i64=0x7fffffffffffffff-0x8000000000000000");
 254     add_test("/visitor/opts/i64/val2/empty",    &expect_fail, "i64=5-");
 255     add_test("/visitor/opts/i64/val2/trailing", &expect_fail, "i64=5-6z");
 256     add_test("/visitor/opts/i64/range/empty",   &expect_fail, "i64=6-5");
 257     add_test("/visitor/opts/i64/range/minval",  &expect_i64_min,
 258              "i64=-0x8000000000000000--0x8000000000000000");
 259     add_test("/visitor/opts/i64/range/maxval",  &expect_i64_max,
 260              "i64=0x7fffffffffffffff-0x7fffffffffffffff");
 261
 262     add_test("/visitor/opts/u64/val1/errno",    &expect_fail, "u64=-1");
 263     add_test("/visitor/opts/u64/val1/empty",    &expect_fail, "u64=");
 264     add_test("/visitor/opts/u64/val1/trailing", &expect_fail, "u64=5z");
 265     add_test("/visitor/opts/u64/nonlist",       &expect_fail, "u64x=5-6");
 266     add_test("/visitor/opts/u64/val2/errno",    &expect_fail,
 267              "u64=0xffffffffffffffff-0x10000000000000000");
 268     add_test("/visitor/opts/u64/val2/empty",    &expect_fail, "u64=5-");
 269     add_test("/visitor/opts/u64/val2/trailing", &expect_fail, "u64=5-6z");
 270     add_test("/visitor/opts/u64/range/empty",   &expect_fail, "u64=6-5");
 271     add_test("/visitor/opts/u64/range/minval",  &expect_zero, "u64=0-0");
 272     add_test("/visitor/opts/u64/range/maxval",  &expect_u64_max,
 273              "u64=0xffffffffffffffff-0xffffffffffffffff");
 274
 275     /* Test maximum range sizes. The macro value is open-coded here
 276      * *intentionally*; the test case must use concrete values by design. If
 277      * OPTS_VISITOR_RANGE_MAX is changed, the following values need to be
 278      * recalculated as well. The assert and this comment should help with it.
 279      */
 280     g_assert(OPTS_VISITOR_RANGE_MAX == 65536);
 281
 282     /* The unsigned case is simple, a u64-u64 difference can always be
 283      * represented as a u64.
 284      */
 285     add_test("/visitor/opts/u64/range/max",  &expect_ok,   "u64=0-65535");
 286     add_test("/visitor/opts/u64/range/2big", &expect_fail, "u64=0-65536");
 287
 288     /* The same cannot be said about an i64-i64 difference. */
 289     add_test("/visitor/opts/i64/range/max/pos/a", &expect_ok,
 290              "i64=0x7fffffffffff0000-0x7fffffffffffffff");
 291     add_test("/visitor/opts/i64/range/max/pos/b", &expect_ok,
 292              "i64=0x7ffffffffffeffff-0x7ffffffffffffffe");
 293     add_test("/visitor/opts/i64/range/2big/pos",  &expect_fail,
 294              "i64=0x7ffffffffffeffff-0x7fffffffffffffff");
 295     add_test("/visitor/opts/i64/range/max/neg/a", &expect_ok,
 296              "i64=-0x8000000000000000--0x7fffffffffff0001");
 297     add_test("/visitor/opts/i64/range/max/neg/b", &expect_ok,
 298              "i64=-0x7fffffffffffffff--0x7fffffffffff0000");
 299     add_test("/visitor/opts/i64/range/2big/neg",  &expect_fail,
 300              "i64=-0x8000000000000000--0x7fffffffffff0000");
 301     add_test("/visitor/opts/i64/range/2big/full", &expect_fail,
 302              "i64=-0x8000000000000000-0x7fffffffffffffff");
 303
 304     g_test_add_func("/visitor/opts/range/unvisited",
 305                     test_opts_range_unvisited);
 306
 307     g_test_run();
 308     return 0;
 309 }