util_test.cpp revision 8d82ea05cb0945ba6cb8bf321b9ffbd0b6932745 
1/*
2 * Copyright (C) 2015 The Android Open Source Project
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
17#include "util.h"
18
19#include <errno.h>
20#include <gtest/gtest.h>
21
22TEST(util, read_file_ENOENT) {
23  std::string s("hello");
24  errno = 0;
25  EXPECT_FALSE(read_file("/proc/does-not-exist", &s));
26  EXPECT_EQ(ENOENT, errno);
27  EXPECT_EQ("", s); // s was cleared.
28}
29
30TEST(util, read_file_success) {
31  std::string s("hello");
32  EXPECT_TRUE(read_file("/proc/version", &s));
33  EXPECT_GT(s.length(), 6U);
34  EXPECT_EQ('\n', s[s.length() - 1]);
35  s[5] = 0;
36  EXPECT_STREQ("Linux", s.c_str());
37}
38
39TEST(util, decode_uid) {
40  EXPECT_EQ(0U, decode_uid("root"));
41  EXPECT_EQ(-1U, decode_uid("toot"));
42  EXPECT_EQ(123U, decode_uid("123"));
43}
44