58 lines
1.7 KiB
C++
58 lines
1.7 KiB
C++
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// Copyright 2018 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <string>
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#include "gtest/gtest.h"
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#include "test/util/fs_util.h"
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#include "test/util/temp_path.h"
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#include "test/util/test_util.h"
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namespace gvisor {
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namespace testing {
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namespace {
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constexpr int kMode = 0666;
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TEST(CreatTest, CreatCreatesNewFile) {
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std::string const path = NewTempAbsPath();
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struct stat buf;
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int fd;
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ASSERT_THAT(stat(path.c_str(), &buf), SyscallFailsWithErrno(ENOENT));
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ASSERT_THAT(fd = creat(path.c_str(), kMode), SyscallSucceeds());
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EXPECT_THAT(close(fd), SyscallSucceeds());
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EXPECT_THAT(stat(path.c_str(), &buf), SyscallSucceeds());
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}
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TEST(CreatTest, CreatTruncatesExistingFile) {
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auto temp_path = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
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int fd;
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ASSERT_NO_ERRNO(SetContents(temp_path.path(), "non-empty"));
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ASSERT_THAT(fd = creat(temp_path.path().c_str(), kMode), SyscallSucceeds());
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EXPECT_THAT(close(fd), SyscallSucceeds());
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std::string new_contents;
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ASSERT_NO_ERRNO(GetContents(temp_path.path(), &new_contents));
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EXPECT_EQ("", new_contents);
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}
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} // namespace
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} // namespace testing
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} // namespace gvisor
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