Abseil Common Libraries (C++) (grcp 依赖)
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102 lines
2.6 KiB
102 lines
2.6 KiB
// Copyright 2017 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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// 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 "absl/strings/internal/ostringstream.h" |
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#include <memory> |
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#include <ostream> |
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#include <string> |
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#include <type_traits> |
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#include "gtest/gtest.h" |
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namespace { |
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TEST(OStringStream, IsOStream) { |
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static_assert( |
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std::is_base_of<std::ostream, absl::strings_internal::OStringStream>(), |
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""); |
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} |
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TEST(OStringStream, ConstructDestroy) { |
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{ |
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absl::strings_internal::OStringStream strm(nullptr); |
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EXPECT_EQ(nullptr, strm.str()); |
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} |
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{ |
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std::string s = "abc"; |
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{ |
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absl::strings_internal::OStringStream strm(&s); |
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EXPECT_EQ(&s, strm.str()); |
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} |
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EXPECT_EQ("abc", s); |
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} |
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{ |
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std::unique_ptr<std::string> s(new std::string); |
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absl::strings_internal::OStringStream strm(s.get()); |
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s.reset(); |
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} |
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} |
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TEST(OStringStream, Str) { |
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std::string s1; |
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absl::strings_internal::OStringStream strm(&s1); |
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const absl::strings_internal::OStringStream& c_strm(strm); |
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static_assert(std::is_same<decltype(strm.str()), std::string*>(), ""); |
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static_assert(std::is_same<decltype(c_strm.str()), const std::string*>(), ""); |
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EXPECT_EQ(&s1, strm.str()); |
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EXPECT_EQ(&s1, c_strm.str()); |
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strm.str(&s1); |
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EXPECT_EQ(&s1, strm.str()); |
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EXPECT_EQ(&s1, c_strm.str()); |
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std::string s2; |
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strm.str(&s2); |
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EXPECT_EQ(&s2, strm.str()); |
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EXPECT_EQ(&s2, c_strm.str()); |
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strm.str(nullptr); |
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EXPECT_EQ(nullptr, strm.str()); |
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EXPECT_EQ(nullptr, c_strm.str()); |
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} |
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TEST(OStreamStream, WriteToLValue) { |
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std::string s = "abc"; |
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{ |
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absl::strings_internal::OStringStream strm(&s); |
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EXPECT_EQ("abc", s); |
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strm << ""; |
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EXPECT_EQ("abc", s); |
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strm << 42; |
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EXPECT_EQ("abc42", s); |
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strm << 'x' << 'y'; |
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EXPECT_EQ("abc42xy", s); |
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} |
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EXPECT_EQ("abc42xy", s); |
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} |
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TEST(OStreamStream, WriteToRValue) { |
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std::string s = "abc"; |
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absl::strings_internal::OStringStream(&s) << ""; |
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EXPECT_EQ("abc", s); |
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absl::strings_internal::OStringStream(&s) << 42; |
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EXPECT_EQ("abc42", s); |
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absl::strings_internal::OStringStream(&s) << 'x' << 'y'; |
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EXPECT_EQ("abc42xy", s); |
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} |
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} // namespace
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