tests/test_tree.c@21840975d541
tests/test_tree.c
Thu, 15 Feb 2024 21:54:43 +0100
- author
- Mike Becker <universe@uap-core.de>
- date
- Thu, 15 Feb 2024 21:54:43 +0100
- changeset 826
- 21840975d541
- parent 816
- 425234b05dff
- child 833
- 5c926801f052
- permissions
- -rw-r--r--
add cx_tree_search() - relates to #165
1 /*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
3 *
4 * Copyright 2023 Mike Becker, Olaf Wintermann All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
29 #include "cx/tree.h"
31 #include "cx/test.h"
33 typedef struct tree_node {
34 struct tree_node *parent;
35 struct tree_node *next;
36 struct tree_node *prev;
37 struct tree_node *children;
38 int data;
39 } tree_node;
41 #define tree_node_layout \
42 offsetof(tree_node, parent), offsetof(tree_node, children), \
43 offsetof(tree_node, prev), offsetof(tree_node, next)
45 #define tree_child_list offsetof(tree_node, children),offsetof(tree_node, next)
47 CX_TEST(test_tree_link_new_child) {
48 tree_node parent = {0};
49 tree_node child = {0};
51 CX_TEST_DO {
52 cx_tree_link(&parent, &child, tree_node_layout);
53 CX_TEST_ASSERT(parent.next == NULL);
54 CX_TEST_ASSERT(parent.prev == NULL);
55 CX_TEST_ASSERT(parent.parent == NULL);
56 CX_TEST_ASSERT(parent.children == &child);
57 CX_TEST_ASSERT(child.parent == &parent);
58 CX_TEST_ASSERT(child.next == NULL);
59 CX_TEST_ASSERT(child.prev == NULL);
60 CX_TEST_ASSERT(child.children == NULL);
61 }
62 }
64 CX_TEST(test_tree_link_add_child) {
65 tree_node parent = {0};
66 tree_node child1 = {0};
67 tree_node child2 = {0};
68 tree_node child3 = {0};
70 CX_TEST_DO {
71 cx_tree_link(&parent, &child1, tree_node_layout);
72 cx_tree_link(&parent, &child2, tree_node_layout);
73 cx_tree_link(&parent, &child3, tree_node_layout);
74 CX_TEST_ASSERT(parent.next == NULL);
75 CX_TEST_ASSERT(parent.prev == NULL);
76 CX_TEST_ASSERT(parent.parent == NULL);
77 CX_TEST_ASSERT(parent.children == &child3);
79 CX_TEST_ASSERT(child1.parent == &parent);
80 CX_TEST_ASSERT(child2.parent == &parent);
81 CX_TEST_ASSERT(child3.parent == &parent);
82 CX_TEST_ASSERT(child1.children == NULL);
83 CX_TEST_ASSERT(child2.children == NULL);
84 CX_TEST_ASSERT(child3.children == NULL);
86 CX_TEST_ASSERT(child3.prev == NULL);
87 CX_TEST_ASSERT(child3.next == &child2);
88 CX_TEST_ASSERT(child2.prev == &child3);
89 CX_TEST_ASSERT(child2.next == &child1);
90 CX_TEST_ASSERT(child1.prev == &child2);
91 CX_TEST_ASSERT(child1.next == NULL);
92 }
93 }
95 CX_TEST(test_tree_link_move_to_other_parent) {
96 tree_node parent = {0};
97 tree_node child1 = {0};
98 tree_node child2 = {0};
99 tree_node child3 = {0};
100 cx_tree_link(&parent, &child1, tree_node_layout);
101 cx_tree_link(&parent, &child2, tree_node_layout);
102 cx_tree_link(&parent, &child3, tree_node_layout);
104 CX_TEST_DO {
105 cx_tree_link(&child3, &child2, tree_node_layout);
107 CX_TEST_ASSERT(parent.next == NULL);
108 CX_TEST_ASSERT(parent.prev == NULL);
109 CX_TEST_ASSERT(parent.parent == NULL);
110 CX_TEST_ASSERT(parent.children == &child3);
112 CX_TEST_ASSERT(child1.parent == &parent);
113 CX_TEST_ASSERT(child2.parent == &child3);
114 CX_TEST_ASSERT(child3.parent == &parent);
115 CX_TEST_ASSERT(child1.children == NULL);
116 CX_TEST_ASSERT(child2.children == NULL);
117 CX_TEST_ASSERT(child3.children == &child2);
119 CX_TEST_ASSERT(child3.prev == NULL);
120 CX_TEST_ASSERT(child3.next == &child1);
121 CX_TEST_ASSERT(child1.prev == &child3);
122 CX_TEST_ASSERT(child1.next == NULL);
124 CX_TEST_ASSERT(child2.prev == NULL);
125 CX_TEST_ASSERT(child2.next == NULL);
126 }
127 }
129 CX_TEST(test_tree_unlink) {
130 tree_node parent = {0};
131 tree_node child1 = {0};
132 tree_node child2 = {0};
133 tree_node child3 = {0};
134 cx_tree_link(&parent, &child1, tree_node_layout);
135 cx_tree_link(&parent, &child3, tree_node_layout);
136 cx_tree_link(&child3, &child2, tree_node_layout);
138 CX_TEST_DO {
139 cx_tree_unlink(&child3, tree_node_layout);
141 CX_TEST_ASSERT(parent.next == NULL);
142 CX_TEST_ASSERT(parent.prev == NULL);
143 CX_TEST_ASSERT(parent.parent == NULL);
144 CX_TEST_ASSERT(parent.children == &child1);
146 CX_TEST_ASSERT(child1.parent == &parent);
147 CX_TEST_ASSERT(child1.children == NULL);
148 CX_TEST_ASSERT(child1.prev == NULL);
149 CX_TEST_ASSERT(child1.next == NULL);
151 // child 3 is unlinked
152 CX_TEST_ASSERT(child3.parent == NULL);
153 CX_TEST_ASSERT(child3.prev == NULL);
154 CX_TEST_ASSERT(child3.next == NULL);
156 // child 2 is still child of the unlinked child 3
157 CX_TEST_ASSERT(child3.children == &child2);
158 CX_TEST_ASSERT(child2.parent == &child3);
159 CX_TEST_ASSERT(child2.children == NULL);
160 CX_TEST_ASSERT(child2.prev == NULL);
161 CX_TEST_ASSERT(child2.next == NULL);
162 }
163 }
165 static int test_tree_search_function(void const *n, void const *d) {
166 tree_node const *node = n;
167 int data = *((int const*)d);
169 if (data < node->data) return -1;
170 else if (data == node->data) return 0;
171 else return data - node->data;
172 }
174 CX_TEST(test_tree_search) {
175 tree_node root = {0};
176 tree_node a = {0};
177 tree_node b = {0};
178 tree_node c = {0};
179 tree_node aa = {0};
180 tree_node ab = {0};
181 tree_node ba = {0};
182 tree_node ca = {0};
183 tree_node cb = {0};
184 tree_node cc = {0};
185 tree_node cba = {0};
187 int testdata[] = {0, 10, 14, 18, 20, 25, 30, 32, 34, 36, 40};
188 tree_node* testnodes[] = {&root, &a, &aa, &ab, &b, &ba, &c, &ca, &cb, &cba, &cc};
190 for (unsigned i = 0 ; i <= 10 ; i++) {
191 testnodes[i]->data = testdata[i];
192 }
194 cx_tree_link(&root, &a, tree_node_layout);
195 cx_tree_link(&root, &b, tree_node_layout);
196 cx_tree_link(&root, &c, tree_node_layout);
198 cx_tree_link(&a, &aa, tree_node_layout);
199 cx_tree_link(&a, &ab, tree_node_layout);
201 cx_tree_link(&b, &ba, tree_node_layout);
203 cx_tree_link(&c, &ca, tree_node_layout);
204 cx_tree_link(&c, &cb, tree_node_layout);
205 cx_tree_link(&c, &cc, tree_node_layout);
207 cx_tree_link(&cb, &cba, tree_node_layout);
209 int s;
210 int r;
211 tree_node *n;
212 CX_TEST_DO {
213 for (unsigned i = 0 ; i <= 10 ; i++) {
214 s = testdata[i];
215 r = cx_tree_search(&root, &s, test_tree_search_function,
216 (void **) &n, tree_child_list);
217 CX_TEST_ASSERT(r == 0);
218 CX_TEST_ASSERT(n == testnodes[i]);
219 }
221 s = -5;
222 r = cx_tree_search(&root, &s, test_tree_search_function,
223 (void **) &n, tree_child_list);
224 CX_TEST_ASSERT(r < 0);
225 CX_TEST_ASSERT(n == NULL);
227 s = 26;
228 r = cx_tree_search(&root, &s, test_tree_search_function,
229 (void **) &n, tree_child_list);
230 CX_TEST_ASSERT(r > 0);
231 CX_TEST_ASSERT(n == &ba);
233 s = 35;
234 r = cx_tree_search(&root, &s, test_tree_search_function,
235 (void **) &n, tree_child_list);
236 CX_TEST_ASSERT(r > 0);
237 CX_TEST_ASSERT(n == &cb);
239 s = 38;
240 r = cx_tree_search(&root, &s, test_tree_search_function,
241 (void **) &n, tree_child_list);
242 CX_TEST_ASSERT(r > 0);
243 CX_TEST_ASSERT(n == &cba);
245 s = 42;
246 r = cx_tree_search(&root, &s, test_tree_search_function,
247 (void **) &n, tree_child_list);
248 CX_TEST_ASSERT(r > 0);
249 CX_TEST_ASSERT(n == &cc);
250 }
251 }
253 CxTestSuite *cx_test_suite_tree_low_level(void) {
254 CxTestSuite *suite = cx_test_suite_new("tree (low level)");
256 cx_test_register(suite, test_tree_link_new_child);
257 cx_test_register(suite, test_tree_link_add_child);
258 cx_test_register(suite, test_tree_link_move_to_other_parent);
259 cx_test_register(suite, test_tree_unlink);
260 cx_test_register(suite, test_tree_search);
262 return suite;
263 }
