1 /*
2 * Copyright (c) 2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include <stdio_ext.h>
17 #include "functionalext.h"
18
19 /**
20 * @tc.name : __fpurge_0100
21 * @tc.desc : Each parameter value is valid and can be used to completely clear the data in the buffer.
22 * @tc.level : Level 0
23 */
__fpurge_0100()24 void __fpurge_0100()
25 {
26 char buf[100];
27 char *str = "This is a test";
28 FILE *fp = fopen("/data/fpurge.txt", "w");
29 EXPECT_PTRNE("__fpurge_0100", fp, NULL);
30
31 fputs(str, fp);
32 size_t ret = __fpurge(fp);
33 fgets(buf, 100, fp);
34 EXPECT_EQ("__fpurge_0100", strstr(buf, str), 0);
35 EXPECT_EQ("__fpurge_0100", ret, 0);
36
37 fclose(fp);
38 remove("/data/fpurge.txt");
39 }
40
main(int argc,char * argv[])41 int main(int argc, char *argv[])
42 {
43 __fpurge_0100();
44 return t_status;
45 }