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