45 lines
1.3 KiB
C++
45 lines
1.3 KiB
C++
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// Copyright 2018 The Abseil Authors.
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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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// https://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 "absl/base/internal/errno_saver.h"
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#include <cerrno>
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#include "gmock/gmock.h"
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#include "gtest/gtest.h"
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namespace {
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using ::testing::Eq;
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struct ErrnoPrinter {
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int no;
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};
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std::ostream &operator<<(std::ostream &os, ErrnoPrinter ep) {
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return os << strerror(ep.no) << " [" << ep.no << "]";
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}
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bool operator==(ErrnoPrinter one, ErrnoPrinter two) { return one.no == two.no; }
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TEST(ErrnoSaverTest, Works) {
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errno = EDOM;
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{
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absl::base_internal::ErrnoSaver errno_saver;
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EXPECT_THAT(ErrnoPrinter{errno}, Eq(ErrnoPrinter{EDOM}));
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errno = ERANGE;
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EXPECT_THAT(ErrnoPrinter{errno}, Eq(ErrnoPrinter{ERANGE}));
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EXPECT_THAT(ErrnoPrinter{errno_saver()}, Eq(ErrnoPrinter{EDOM}));
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}
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EXPECT_THAT(ErrnoPrinter{errno}, Eq(ErrnoPrinter{EDOM}));
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}
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} // namespace
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