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29//
30// Author: wan@google.com (Zhanyong Wan)
31//
32// Tests for the Message class.
33
34#include "gtest/gtest-message.h"
35
36#include "gtest/gtest.h"
37
38namespace {
39
40using ::testing::Message;
41
42// A helper function that turns a Message into a C string.
43const char* ToCString(const Message& msg) {
44  static testing::internal::String result;
45  result = msg.GetString();
46  return result.c_str();
47}
48
49// Tests the testing::Message class
50
51// Tests the default constructor.
52TEST(MessageTest, DefaultConstructor) {
53  const Message msg;
54  EXPECT_STREQ("", ToCString(msg));
55}
56
57// Tests the copy constructor.
58TEST(MessageTest, CopyConstructor) {
59  const Message msg1("Hello");
60  const Message msg2(msg1);
61  EXPECT_STREQ("Hello", ToCString(msg2));
62}
63
64// Tests constructing a Message from a C-string.
65TEST(MessageTest, ConstructsFromCString) {
66  Message msg("Hello");
67  EXPECT_STREQ("Hello", ToCString(msg));
68}
69
70// Tests streaming a float.
71TEST(MessageTest, StreamsFloat) {
72  const char* const s = ToCString(Message() << 1.23456F << " " << 2.34567F);
73  // Both numbers should be printed with enough precision.
74  EXPECT_PRED_FORMAT2(testing::IsSubstring, "1.234560", s);
75  EXPECT_PRED_FORMAT2(testing::IsSubstring, " 2.345669", s);
76}
77
78// Tests streaming a double.
79TEST(MessageTest, StreamsDouble) {
80  const char* const s = ToCString(Message() << 1260570880.4555497 << " "
81                                  << 1260572265.1954534);
82  // Both numbers should be printed with enough precision.
83  EXPECT_PRED_FORMAT2(testing::IsSubstring, "1260570880.45", s);
84  EXPECT_PRED_FORMAT2(testing::IsSubstring, " 1260572265.19", s);
85}
86
87// Tests streaming a non-char pointer.
88TEST(MessageTest, StreamsPointer) {
89  int n = 0;
90  int* p = &n;
91  EXPECT_STRNE("(null)", ToCString(Message() << p));
92}
93
94// Tests streaming a NULL non-char pointer.
95TEST(MessageTest, StreamsNullPointer) {
96  int* p = NULL;
97  EXPECT_STREQ("(null)", ToCString(Message() << p));
98}
99
100// Tests streaming a C string.
101TEST(MessageTest, StreamsCString) {
102  EXPECT_STREQ("Foo", ToCString(Message() << "Foo"));
103}
104
105// Tests streaming a NULL C string.
106TEST(MessageTest, StreamsNullCString) {
107  char* p = NULL;
108  EXPECT_STREQ("(null)", ToCString(Message() << p));
109}
110
111// Tests streaming std::string.
112TEST(MessageTest, StreamsString) {
113  const ::std::string str("Hello");
114  EXPECT_STREQ("Hello", ToCString(Message() << str));
115}
116
117// Tests that we can output strings containing embedded NULs.
118TEST(MessageTest, StreamsStringWithEmbeddedNUL) {
119  const char char_array_with_nul[] =
120      "Here's a NUL\0 and some more string";
121  const ::std::string string_with_nul(char_array_with_nul,
122                                      sizeof(char_array_with_nul) - 1);
123  EXPECT_STREQ("Here's a NUL\\0 and some more string",
124               ToCString(Message() << string_with_nul));
125}
126
127// Tests streaming a NUL char.
128TEST(MessageTest, StreamsNULChar) {
129  EXPECT_STREQ("\\0", ToCString(Message() << '\0'));
130}
131
132// Tests streaming int.
133TEST(MessageTest, StreamsInt) {
134  EXPECT_STREQ("123", ToCString(Message() << 123));
135}
136
137// Tests that basic IO manipulators (endl, ends, and flush) can be
138// streamed to Message.
139TEST(MessageTest, StreamsBasicIoManip) {
140  EXPECT_STREQ("Line 1.\nA NUL char \\0 in line 2.",
141               ToCString(Message() << "Line 1." << std::endl
142                         << "A NUL char " << std::ends << std::flush
143                         << " in line 2."));
144}
145
146// Tests Message::GetString()
147TEST(MessageTest, GetString) {
148  Message msg;
149  msg << 1 << " lamb";
150  EXPECT_STREQ("1 lamb", msg.GetString().c_str());
151}
152
153// Tests streaming a Message object to an ostream.
154TEST(MessageTest, StreamsToOStream) {
155  Message msg("Hello");
156  ::std::stringstream ss;
157  ss << msg;
158  EXPECT_STREQ("Hello", testing::internal::StringStreamToString(&ss).c_str());
159}
160
161// Tests that a Message object doesn't take up too much stack space.
162TEST(MessageTest, DoesNotTakeUpMuchStackSpace) {
163  EXPECT_LE(sizeof(Message), 16U);
164}
165
166}  // namespace
167