ostringstream_test.cc
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1 // Copyright 2017 The Abseil Authors.
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // https://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 
16 
17 #include <memory>
18 #include <ostream>
19 #include <string>
20 #include <type_traits>
21 
22 #include "gtest/gtest.h"
23 
24 namespace {
25 
26 TEST(OStringStream, IsOStream) {
27  static_assert(
28  std::is_base_of<std::ostream, absl::strings_internal::OStringStream>(),
29  "");
30 }
31 
32 TEST(OStringStream, ConstructDestroy) {
33  {
35  EXPECT_EQ(nullptr, strm.str());
36  }
37  {
38  std::string s = "abc";
39  {
41  EXPECT_EQ(&s, strm.str());
42  }
43  EXPECT_EQ("abc", s);
44  }
45  {
46  std::unique_ptr<std::string> s(new std::string);
48  s.reset();
49  }
50 }
51 
52 TEST(OStringStream, Str) {
53  std::string s1;
55  const absl::strings_internal::OStringStream& c_strm(strm);
56 
57  static_assert(std::is_same<decltype(strm.str()), std::string*>(), "");
58  static_assert(std::is_same<decltype(c_strm.str()), const std::string*>(), "");
59 
60  EXPECT_EQ(&s1, strm.str());
61  EXPECT_EQ(&s1, c_strm.str());
62 
63  strm.str(&s1);
64  EXPECT_EQ(&s1, strm.str());
65  EXPECT_EQ(&s1, c_strm.str());
66 
67  std::string s2;
68  strm.str(&s2);
69  EXPECT_EQ(&s2, strm.str());
70  EXPECT_EQ(&s2, c_strm.str());
71 
72  strm.str(nullptr);
73  EXPECT_EQ(nullptr, strm.str());
74  EXPECT_EQ(nullptr, c_strm.str());
75 }
76 
77 TEST(OStreamStream, WriteToLValue) {
78  std::string s = "abc";
79  {
81  EXPECT_EQ("abc", s);
82  strm << "";
83  EXPECT_EQ("abc", s);
84  strm << 42;
85  EXPECT_EQ("abc42", s);
86  strm << 'x' << 'y';
87  EXPECT_EQ("abc42xy", s);
88  }
89  EXPECT_EQ("abc42xy", s);
90 }
91 
92 TEST(OStreamStream, WriteToRValue) {
93  std::string s = "abc";
95  EXPECT_EQ("abc", s);
97  EXPECT_EQ("abc42", s);
98  absl::strings_internal::OStringStream(&s) << 'x' << 'y';
99  EXPECT_EQ("abc42xy", s);
100 }
101 
102 } // namespace
TEST(Symbolize, Unimplemented)


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autogenerated on Wed Jun 19 2019 19:19:57