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 <fcntl.h>
17 #include "functionalext.h"
18
19 const int SIZE = 20;
20
21 /**
22 * @tc.name : read_0100
23 * @tc.desc : The parameters are valid and the actual number of characters can be read.
24 * @tc.level : Level 0
25 */
read_0100(void)26 void read_0100(void)
27 {
28 char str[] = "this is a readtest\n";
29 char buffer[1024] = {0};
30 int fd = open("/data/readtest.txt", O_RDWR | O_CREAT, TEST_MODE);
31 EXPECT_TRUE("read_0100", fd >= 0);
32 int retwrite = write(fd, str, sizeof(str));
33 EXPECT_EQ("read_0100", retwrite, SIZE);
34 lseek(fd, 0, SEEK_SET);
35 int size = read(fd, buffer, 1024);
36 EXPECT_EQ("read_0100", size, SIZE);
37 close(fd);
38 remove("/data/readtest.txt");
39 }
40
main(int argc,char * argv[])41 int main(int argc, char *argv[])
42 {
43 read_0100();
44 return t_status;
45 }