xref: /qemu/tests/unit/test-opts-visitor.c (revision 727385c4) 
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     Error *err = NULL;
179     intList *list = NULL;
180     intList *tail;
181     QemuOpts *opts;
182     Visitor *v;
183 
184     opts = qemu_opts_parse(qemu_find_opts("userdef"), "ilist=0-2", false,
185                            &error_abort);
186 
187     v = opts_visitor_new(opts);
188 
189     visit_start_struct(v, NULL, NULL, 0, &error_abort);
190 
191     /* Would be simpler if the visitor genuinely supported virtual walks */
192     visit_start_list(v, "ilist", (GenericList **)&list, sizeof(*list),
193                      &error_abort);
194     tail = list;
195     visit_type_int(v, NULL, &tail->value, &error_abort);
196     g_assert_cmpint(tail->value, ==, 0);
197     tail = (intList *)visit_next_list(v, (GenericList *)tail, sizeof(*list));
198     g_assert(tail);
199     visit_type_int(v, NULL, &tail->value, &error_abort);
200     g_assert_cmpint(tail->value, ==, 1);
201     tail = (intList *)visit_next_list(v, (GenericList *)tail, sizeof(*list));
202     g_assert(tail);
203     visit_check_list(v, &error_abort); /* unvisited tail ignored until... */
204     visit_end_list(v, (void **)&list);
205 
206     visit_check_struct(v, &err); /* ...here */
207     error_free_or_abort(&err);
208     visit_end_struct(v, NULL);
209 
210     qapi_free_intList(list);
211     visit_free(v);
212     qemu_opts_del(opts);
213 }
214 
215 static void
216 test_opts_range_beyond(void)
217 {
218     Error *err = NULL;
219     intList *list = NULL;
220     intList *tail;
221     QemuOpts *opts;
222     Visitor *v;
223     int64_t val;
224 
225     opts = qemu_opts_parse(qemu_find_opts("userdef"), "ilist=0", false,
226                            &error_abort);
227 
228     v = opts_visitor_new(opts);
229 
230     visit_start_struct(v, NULL, NULL, 0, &error_abort);
231 
232     /* Would be simpler if the visitor genuinely supported virtual walks */
233     visit_start_list(v, "ilist", (GenericList **)&list, sizeof(*list),
234                      &error_abort);
235     tail = list;
236     visit_type_int(v, NULL, &tail->value, &error_abort);
237     g_assert_cmpint(tail->value, ==, 0);
238     tail = (intList *)visit_next_list(v, (GenericList *)tail, sizeof(*tail));
239     g_assert(!tail);
240     visit_type_int(v, NULL, &val, &err);
241     error_free_or_abort(&err);
242     visit_end_list(v, (void **)&list);
243 
244     visit_check_struct(v, &error_abort);
245     visit_end_struct(v, NULL);
246 
247     qapi_free_intList(list);
248     visit_free(v);
249     qemu_opts_del(opts);
250 }
251 
252 static void
253 test_opts_dict_unvisited(void)
254 {
255     Error *err = NULL;
256     QemuOpts *opts;
257     Visitor *v;
258     UserDefOptions *userdef;
259 
260     opts = qemu_opts_parse(qemu_find_opts("userdef"), "i64x=0,bogus=1", false,
261                            &error_abort);
262 
263     v = opts_visitor_new(opts);
264     visit_type_UserDefOptions(v, NULL, &userdef, &err);
265     error_free_or_abort(&err);
266     visit_free(v);
267     qemu_opts_del(opts);
268     g_assert(!userdef);
269 }
270 
271 int
272 main(int argc, char **argv)
273 {
274     g_test_init(&argc, &argv, NULL);
275 
276     qemu_add_opts(&userdef_opts);
277 
278     /* Three hexadecimal magic numbers, "dead beef", "bad coffee, odd food" and
279      * "disease", from
280      * <http://en.wikipedia.org/wiki/Magic_number_%28programming%29>, were
281      * converted to binary and dissected into bit ranges. Each magic number is
282      * going to be recomposed using the lists called "i64", "u64" and "u16",
283      * respectively.
284      *
285      * (Note that these types pertain to the individual bit shift counts, not
286      * the magic numbers themselves; the intent is to exercise opts_type_int()
287      * and opts_type_uint64().)
288      *
289      * The "i64" shift counts have been decreased by 16 (decimal) in order to
290      * test negative values as well. Finally, the full list of QemuOpt elements
291      * has been permuted with "shuf".
292      *
293      * Both "i64" and "u64" have some (distinct) single-element ranges
294      * represented as both "a" and "a-a". "u16" is a special case of "i64" (see
295      * visit_type_uint16()), so it wouldn't add a separate test in this regard.
296      */
297 
298     add_test("/visitor/opts/flatten/value", &test_value,
299              "i64=-1-0,u64=12-16,u64=2-3,i64=-11--9,u64=57,u16=9,i64=5-5,"
300              "u16=1-4,u16=20,u64=63-63,i64=-16--13,u64=50-52,i64=14-15,u16=11,"
301              "i64=7,u16=18,i64=2-3,u16=6,u64=54-55,u64=0,u64=18-20,u64=33-43,"
302              "i64=9-12,u16=26-27,u64=59-61,u16=13-16,u64=29-31,u64=22-23,"
303              "u16=24,i64=-7--3");
304 
305     add_test("/visitor/opts/i64/val1/errno",    &expect_fail,
306              "i64=0x8000000000000000");
307     add_test("/visitor/opts/i64/val1/empty",    &expect_fail, "i64=");
308     add_test("/visitor/opts/i64/val1/trailing", &expect_fail, "i64=5z");
309     add_test("/visitor/opts/i64/nonlist",       &expect_fail, "i64x=5-6");
310     add_test("/visitor/opts/i64/val2/errno",    &expect_fail,
311              "i64=0x7fffffffffffffff-0x8000000000000000");
312     add_test("/visitor/opts/i64/val2/empty",    &expect_fail, "i64=5-");
313     add_test("/visitor/opts/i64/val2/trailing", &expect_fail, "i64=5-6z");
314     add_test("/visitor/opts/i64/range/empty",   &expect_fail, "i64=6-5");
315     add_test("/visitor/opts/i64/range/minval",  &expect_i64_min,
316              "i64=-0x8000000000000000--0x8000000000000000");
317     add_test("/visitor/opts/i64/range/maxval",  &expect_i64_max,
318              "i64=0x7fffffffffffffff-0x7fffffffffffffff");
319 
320     add_test("/visitor/opts/u64/val1/errno",    &expect_fail, "u64=-1");
321     add_test("/visitor/opts/u64/val1/empty",    &expect_fail, "u64=");
322     add_test("/visitor/opts/u64/val1/trailing", &expect_fail, "u64=5z");
323     add_test("/visitor/opts/u64/nonlist",       &expect_fail, "u64x=5-6");
324     add_test("/visitor/opts/u64/val2/errno",    &expect_fail,
325              "u64=0xffffffffffffffff-0x10000000000000000");
326     add_test("/visitor/opts/u64/val2/empty",    &expect_fail, "u64=5-");
327     add_test("/visitor/opts/u64/val2/trailing", &expect_fail, "u64=5-6z");
328     add_test("/visitor/opts/u64/range/empty",   &expect_fail, "u64=6-5");
329     add_test("/visitor/opts/u64/range/minval",  &expect_zero, "u64=0-0");
330     add_test("/visitor/opts/u64/range/maxval",  &expect_u64_max,
331              "u64=0xffffffffffffffff-0xffffffffffffffff");
332 
333     /* Test maximum range sizes. The macro value is open-coded here
334      * *intentionally*; the test case must use concrete values by design. If
335      * OPTS_VISITOR_RANGE_MAX is changed, the following values need to be
336      * recalculated as well. The assert and this comment should help with it.
337      */
338     g_assert(OPTS_VISITOR_RANGE_MAX == 65536);
339 
340     /* The unsigned case is simple, a u64-u64 difference can always be
341      * represented as a u64.
342      */
343     add_test("/visitor/opts/u64/range/max",  &expect_ok,   "u64=0-65535");
344     add_test("/visitor/opts/u64/range/2big", &expect_fail, "u64=0-65536");
345 
346     /* The same cannot be said about an i64-i64 difference. */
347     add_test("/visitor/opts/i64/range/max/pos/a", &expect_ok,
348              "i64=0x7fffffffffff0000-0x7fffffffffffffff");
349     add_test("/visitor/opts/i64/range/max/pos/b", &expect_ok,
350              "i64=0x7ffffffffffeffff-0x7ffffffffffffffe");
351     add_test("/visitor/opts/i64/range/2big/pos",  &expect_fail,
352              "i64=0x7ffffffffffeffff-0x7fffffffffffffff");
353     add_test("/visitor/opts/i64/range/max/neg/a", &expect_ok,
354              "i64=-0x8000000000000000--0x7fffffffffff0001");
355     add_test("/visitor/opts/i64/range/max/neg/b", &expect_ok,
356              "i64=-0x7fffffffffffffff--0x7fffffffffff0000");
357     add_test("/visitor/opts/i64/range/2big/neg",  &expect_fail,
358              "i64=-0x8000000000000000--0x7fffffffffff0000");
359     add_test("/visitor/opts/i64/range/2big/full", &expect_fail,
360              "i64=-0x8000000000000000-0x7fffffffffffffff");
361 
362     g_test_add_func("/visitor/opts/range/unvisited",
363                     test_opts_range_unvisited);
364     g_test_add_func("/visitor/opts/range/beyond",
365                     test_opts_range_beyond);
366 
367     g_test_add_func("/visitor/opts/dict/unvisited", test_opts_dict_unvisited);
368 
369     g_test_run();
370     return 0;
371 }
372