/src/example/customer_database_test.c

 1/*
 2 * Copyright 2008 Google Inc.
 3 *
 4 * Licensed under the Apache License, Version 2.0 (the "License");
 5 * you may not use this file except in compliance with the License.
 6 * You may obtain a copy of the License at
 7 *
 8 * http://www.apache.org/licenses/LICENSE-2.0
 9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16#include <stdarg.h>
17#include <stddef.h>
18#include <setjmp.h>
19#include <cmockery.h>
20#include <database.h>
21
22extern DatabaseConnection* connect_to_customer_database();
23extern unsigned int get_customer_id_by_name(
24    DatabaseConnection * const connection, const char * const customer_name);
25
26// Mock query database function.
27unsigned int mock_query_database(
28        DatabaseConnection* const connection, const char * const query_string,
29        void *** const results) {
30    *results = (void**)((unsigned)mock());
31    return (unsigned int)mock();
32}
33
34// Mock of the connect to database function.
35DatabaseConnection* connect_to_database(const char * const database_url,
36                                        const unsigned int port) {
37    return (DatabaseConnection*)((unsigned)mock());
38}
39
40void test_connect_to_customer_database(void **state) {
41    will_return(connect_to_database, 0x0DA7ABA53);
42    assert_int_equal((int)connect_to_customer_database(), 0x0DA7ABA53);
43}
44
45/* This test fails as the mock function connect_to_database() will have no
46 * value to return. */
47void fail_connect_to_customer_database(void **state) {
48    assert_true(connect_to_customer_database() ==
49                (DatabaseConnection*)0x0DA7ABA53);
50}
51
52void test_get_customer_id_by_name(void **state) {
53    DatabaseConnection connection = {
54        "somedatabase.somewhere.com", 12345678, mock_query_database
55    };
56    // Return a single customer ID when mock_query_database() is called.
57    int customer_ids = 543;
58    will_return(mock_query_database, &customer_ids);
59    will_return(mock_query_database, 1);
60    assert_int_equal(get_customer_id_by_name(&connection, "john doe"), 543);
61}
62
63int main(int argc, char* argv[]) {
64    const UnitTest tests[] = {
65        unit_test(test_connect_to_customer_database),
66        unit_test(test_get_customer_id_by_name),
67    };
68    return run_tests(tests);
69}