1 // Protocol Buffers - Google's data interchange format
2 // Copyright 2008 Google Inc. All rights reserved.
3 // https://developers.google.com/protocol-buffers/
4 //
5 // Redistribution and use in source and binary forms, with or without
6 // modification, are permitted provided that the following conditions are
7 // met:
8 //
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10 // notice, this list of conditions and the following disclaimer.
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13 // in the documentation and/or other materials provided with the
14 // distribution.
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16 // contributors may be used to endorse or promote products derived from
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18 //
19 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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28 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30
31 // Based on mvels@'s frankenstring.
32
33 #include <google/protobuf/arenastring.h>
34
35 #include <algorithm>
36 #include <cstdlib>
37 #include <memory>
38 #include <string>
39 #include <vector>
40
41 #include <google/protobuf/stubs/logging.h>
42 #include <google/protobuf/stubs/common.h>
43 #include <google/protobuf/io/coded_stream.h>
44 #include <google/protobuf/io/zero_copy_stream_impl.h>
45 #include <gtest/gtest.h>
46
47
48 namespace google {
49 namespace protobuf {
50
51 using internal::ArenaStringPtr;
52
53
WrapString(const char * value)54 static std::string WrapString(const char* value) { return value; }
55
56 // Test ArenaStringPtr with arena == NULL.
TEST(ArenaStringPtrTest,ArenaStringPtrOnHeap)57 TEST(ArenaStringPtrTest, ArenaStringPtrOnHeap) {
58 ArenaStringPtr field;
59 std::string default_value = "default";
60 field.UnsafeSetDefault(&default_value);
61 EXPECT_EQ(std::string("default"), field.Get());
62 field.Set(&default_value, WrapString("Test short"), NULL);
63 EXPECT_EQ(std::string("Test short"), field.Get());
64 field.Set(&default_value, WrapString("Test long long long long value"), NULL);
65 EXPECT_EQ(std::string("Test long long long long value"), field.Get());
66 field.Set(&default_value, std::string(""), NULL);
67 field.Destroy(&default_value, NULL);
68
69 ArenaStringPtr field2;
70 field2.UnsafeSetDefault(&default_value);
71 std::string* mut = field2.Mutable(&default_value, NULL);
72 EXPECT_EQ(mut, field2.Mutable(&default_value, NULL));
73 EXPECT_EQ(mut, &field2.Get());
74 EXPECT_NE(&default_value, mut);
75 EXPECT_EQ(std::string("default"), *mut);
76 *mut = "Test long long long long value"; // ensure string allocates storage
77 EXPECT_EQ(std::string("Test long long long long value"), field2.Get());
78 field2.Destroy(&default_value, NULL);
79 }
80
TEST(ArenaStringPtrTest,ArenaStringPtrOnArena)81 TEST(ArenaStringPtrTest, ArenaStringPtrOnArena) {
82 Arena arena;
83 ArenaStringPtr field;
84 std::string default_value = "default";
85 field.UnsafeSetDefault(&default_value);
86 EXPECT_EQ(std::string("default"), field.Get());
87 field.Set(&default_value, WrapString("Test short"), &arena);
88 EXPECT_EQ(std::string("Test short"), field.Get());
89 field.Set(&default_value, WrapString("Test long long long long value"),
90 &arena);
91 EXPECT_EQ(std::string("Test long long long long value"), field.Get());
92 field.Set(&default_value, std::string(""), &arena);
93 field.Destroy(&default_value, &arena);
94
95 ArenaStringPtr field2;
96 field2.UnsafeSetDefault(&default_value);
97 std::string* mut = field2.Mutable(&default_value, &arena);
98 EXPECT_EQ(mut, field2.Mutable(&default_value, &arena));
99 EXPECT_EQ(mut, &field2.Get());
100 EXPECT_NE(&default_value, mut);
101 EXPECT_EQ(std::string("default"), *mut);
102 *mut = "Test long long long long value"; // ensure string allocates storage
103 EXPECT_EQ(std::string("Test long long long long value"), field2.Get());
104 field2.Destroy(&default_value, &arena);
105 }
106
TEST(ArenaStringPtrTest,ArenaStringPtrOnArenaNoSSO)107 TEST(ArenaStringPtrTest, ArenaStringPtrOnArenaNoSSO) {
108 Arena arena;
109 ArenaStringPtr field;
110 std::string default_value = "default";
111 field.UnsafeSetDefault(&default_value);
112 EXPECT_EQ(std::string("default"), field.Get());
113
114 // Avoid triggering the SSO optimization by setting the string to something
115 // larger than the internal buffer.
116 field.Set(&default_value, WrapString("Test long long long long value"),
117 &arena);
118 EXPECT_EQ(std::string("Test long long long long value"), field.Get());
119 field.Set(&default_value, std::string(""), &arena);
120 field.Destroy(&default_value, &arena);
121
122 ArenaStringPtr field2;
123 field2.UnsafeSetDefault(&default_value);
124 std::string* mut = field2.Mutable(&default_value, &arena);
125 EXPECT_EQ(mut, field2.Mutable(&default_value, &arena));
126 EXPECT_EQ(mut, &field2.Get());
127 EXPECT_NE(&default_value, mut);
128 EXPECT_EQ(std::string("default"), *mut);
129 *mut = "Test long long long long value"; // ensure string allocates storage
130 EXPECT_EQ(std::string("Test long long long long value"), field2.Get());
131 field2.Destroy(&default_value, &arena);
132 }
133
134
135 } // namespace protobuf
136 } // namespace google
137