1 /* 2 * Copyright (C) 2012 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 <gtest/gtest.h> 18 19 #include <errno.h> 20 #include <limits.h> 21 #include <unistd.h> 22 23 TEST(getcwd, auto_full) { 24 // If we let the library do all the work, everything's fine. 25 errno = 0; 26 char* cwd = getcwd(NULL, 0); 27 ASSERT_TRUE(cwd != NULL); 28 ASSERT_EQ(0, errno); 29 ASSERT_GE(strlen(cwd), 1U); 30 free(cwd); 31 } 32 33 TEST(getcwd, auto_reasonable) { 34 // If we ask the library to allocate a reasonable buffer, everything's fine. 35 errno = 0; 36 char* cwd = getcwd(NULL, PATH_MAX); 37 ASSERT_TRUE(cwd != NULL); 38 ASSERT_EQ(0, errno); 39 ASSERT_GE(strlen(cwd), 1U); 40 free(cwd); 41 } 42 43 TEST(getcwd, auto_too_small) { 44 // If we ask the library to allocate a too-small buffer, ERANGE. 45 errno = 0; 46 char* cwd = getcwd(NULL, 1); 47 ASSERT_TRUE(cwd == NULL); 48 ASSERT_EQ(ERANGE, errno); 49 } 50 51 TEST(getcwd, auto_too_large) { 52 // If we ask the library to allocate an unreasonably large buffer, ERANGE. 53 errno = 0; 54 char* cwd = getcwd(NULL, static_cast<size_t>(-1)); 55 ASSERT_TRUE(cwd == NULL); 56 ASSERT_EQ(ENOMEM, errno); 57 } 58 59 TEST(getcwd, manual_too_small) { 60 // If we allocate a too-small buffer, ERANGE. 61 char tiny_buf[1]; 62 errno = 0; 63 char* cwd = getcwd(tiny_buf, sizeof(tiny_buf)); 64 ASSERT_TRUE(cwd == NULL); 65 ASSERT_EQ(ERANGE, errno); 66 } 67 68 TEST(getcwd, manual_zero) { 69 // If we allocate a zero-length buffer, EINVAL. 70 char tiny_buf[1]; 71 errno = 0; 72 char* cwd = getcwd(tiny_buf, 0); 73 ASSERT_TRUE(cwd == NULL); 74 ASSERT_EQ(EINVAL, errno); 75 } 76 77 TEST(getcwd, manual_path_max) { 78 char* buf = new char[PATH_MAX]; 79 errno = 0; 80 char* cwd = getcwd(buf, PATH_MAX); 81 ASSERT_TRUE(cwd == buf); 82 ASSERT_EQ(0, errno); 83 ASSERT_GE(strlen(cwd), 1U); 84 delete[] cwd; 85 } 86
