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