1 /* GLib testing framework examples and tests 2 * 3 * Copyright © 2018 Endless Mobile, Inc. 4 * 5 * This library is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU Lesser General Public 7 * License as published by the Free Software Foundation; either 8 * version 2.1 of the License, or (at your option) any later version. 9 * 10 * This library is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * Lesser General Public License for more details. 14 * 15 * You should have received a copy of the GNU Lesser General 16 * Public License along with this library; if not, see <http://www.gnu.org/licenses/>. 17 * 18 * Author: Philip Withnall <withnall@endlessm.com> 19 */ 20 21 #include <glib.h> 22 23 /* Test that G_STATIC_ASSERT_EXPR can be used as an expression */ 24 static void 25 test_assert_static (void) 26 { 27 G_STATIC_ASSERT (4 == 4); 28 if (G_STATIC_ASSERT_EXPR (1 == 1), sizeof (gchar) == 2) 29 g_assert_not_reached (); 30 } 31 32 /* Test G_ALIGNOF() gives the same results as the G_STRUCT_OFFSET fallback. This 33 * should be the minimal alignment for the given type. 34 * 35 * This is necessary because the implementation of G_ALIGNOF() varies depending 36 * on the compiler in use. We want all implementations to be consistent. 37 * 38 * In the case that the compiler uses the G_STRUCT_OFFSET fallback, this test 39 * is a no-op. */ 40 static void 41 test_alignof_fallback (void) 42 { 43 #define check_alignof(type) \ 44 g_assert_cmpint (G_ALIGNOF (type), ==, G_STRUCT_OFFSET (struct { char a; type b; }, b)) 45 46 check_alignof (char); 47 check_alignof (int); 48 check_alignof (float); 49 check_alignof (double); 50 check_alignof (struct { char a; int b; }); 51 } 52 53 static void 54 test_struct_sizeof_member (void) 55 { 56 G_STATIC_ASSERT (G_SIZEOF_MEMBER (struct { char a; int b; }, a) == sizeof (char)); 57 g_assert_cmpint (G_SIZEOF_MEMBER (struct { char a; int b; }, b), ==, sizeof (int)); 58 } 59 60 int 61 main (int argc, 62 char *argv[]) 63 { 64 g_test_init (&argc, &argv, NULL); 65 66 g_test_add_func ("/alignof/fallback", test_alignof_fallback); 67 g_test_add_func ("/assert/static", test_assert_static); 68 g_test_add_func ("/struct/sizeof_member", test_struct_sizeof_member); 69 70 return g_test_run (); 71 } 72