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 */
24void __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
41int main(int argc, char *argv[])
42{
43    __fpurge_0100();
44    return t_status;
45}