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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <gtest/gtest.h>
#include <errno.h>
#include <limits.h>
#include <unistd.h>
TEST(getcwd, auto_full) {
// If we let the library do all the work, everything's fine.
errno = 0;
char* cwd = getcwd(NULL, 0);
ASSERT_TRUE(cwd != NULL);
ASSERT_EQ(0, errno);
ASSERT_GE(strlen(cwd), 1U);
free(cwd);
}
TEST(getcwd, auto_reasonable) {
// If we ask the library to allocate a reasonable buffer, everything's fine.
errno = 0;
char* cwd = getcwd(NULL, PATH_MAX);
ASSERT_TRUE(cwd != NULL);
ASSERT_EQ(0, errno);
ASSERT_GE(strlen(cwd), 1U);
free(cwd);
}
TEST(getcwd, auto_too_small) {
// If we ask the library to allocate a too-small buffer, ERANGE.
errno = 0;
char* cwd = getcwd(NULL, 1);
ASSERT_TRUE(cwd == NULL);
ASSERT_EQ(ERANGE, errno);
}
TEST(getcwd, auto_too_large) {
// If we ask the library to allocate an unreasonably large buffer, ERANGE.
errno = 0;
char* cwd = getcwd(NULL, static_cast<size_t>(-1));
ASSERT_TRUE(cwd == NULL);
ASSERT_EQ(ENOMEM, errno);
}
TEST(getcwd, manual_too_small) {
// If we allocate a too-small buffer, ERANGE.
char tiny_buf[1];
errno = 0;
char* cwd = getcwd(tiny_buf, sizeof(tiny_buf));
ASSERT_TRUE(cwd == NULL);
ASSERT_EQ(ERANGE, errno);
}
TEST(getcwd, manual_zero) {
// If we allocate a zero-length buffer, EINVAL.
char tiny_buf[1];
errno = 0;
char* cwd = getcwd(tiny_buf, 0);
ASSERT_TRUE(cwd == NULL);
ASSERT_EQ(EINVAL, errno);
}
TEST(getcwd, manual_path_max) {
char* buf = new char[PATH_MAX];
errno = 0;
char* cwd = getcwd(buf, PATH_MAX);
ASSERT_TRUE(cwd == buf);
ASSERT_EQ(0, errno);
ASSERT_GE(strlen(cwd), 1U);
delete[] cwd;
}
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