util_test.cpp revision 395e29472fa012c4177d981d9ce699625b706f4f
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 21#include <gtest/gtest.h> 22 23TEST(util, read_file_ENOENT) { 24 std::string s("hello"); 25 errno = 0; 26 EXPECT_FALSE(read_file("/proc/does-not-exist", &s)); 27 EXPECT_EQ(ENOENT, errno); 28 EXPECT_EQ("", s); // s was cleared. 29} 30 31TEST(util, read_file_success) { 32 std::string s("hello"); 33 EXPECT_TRUE(read_file("/proc/version", &s)); 34 EXPECT_GT(s.length(), 6U); 35 EXPECT_EQ('\n', s[s.length() - 1]); 36 s[5] = 0; 37 EXPECT_STREQ("Linux", s.c_str()); 38} 39 40TEST(util, decode_uid) { 41 EXPECT_EQ(0U, decode_uid("root")); 42 EXPECT_EQ(UINT_MAX, decode_uid("toot")); 43 EXPECT_EQ(123U, decode_uid("123")); 44} 45