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      1 // Copyright 2005, Google Inc.
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     29 //
     30 // Author: wan (at) 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 
     38 namespace {
     39 
     40 using ::testing::Message;
     41 
     42 // Tests the testing::Message class
     43 
     44 // Tests the default constructor.
     45 TEST(MessageTest, DefaultConstructor) {
     46   const Message msg;
     47   EXPECT_EQ("", msg.GetString());
     48 }
     49 
     50 // Tests the copy constructor.
     51 TEST(MessageTest, CopyConstructor) {
     52   const Message msg1("Hello");
     53   const Message msg2(msg1);
     54   EXPECT_EQ("Hello", msg2.GetString());
     55 }
     56 
     57 // Tests constructing a Message from a C-string.
     58 TEST(MessageTest, ConstructsFromCString) {
     59   Message msg("Hello");
     60   EXPECT_EQ("Hello", msg.GetString());
     61 }
     62 
     63 // Tests streaming a float.
     64 TEST(MessageTest, StreamsFloat) {
     65   const std::string s = (Message() << 1.23456F << " " << 2.34567F).GetString();
     66   // Both numbers should be printed with enough precision.
     67   EXPECT_PRED_FORMAT2(testing::IsSubstring, "1.234560", s.c_str());
     68   EXPECT_PRED_FORMAT2(testing::IsSubstring, " 2.345669", s.c_str());
     69 }
     70 
     71 // Tests streaming a double.
     72 TEST(MessageTest, StreamsDouble) {
     73   const std::string s = (Message() << 1260570880.4555497 << " "
     74                                   << 1260572265.1954534).GetString();
     75   // Both numbers should be printed with enough precision.
     76   EXPECT_PRED_FORMAT2(testing::IsSubstring, "1260570880.45", s.c_str());
     77   EXPECT_PRED_FORMAT2(testing::IsSubstring, " 1260572265.19", s.c_str());
     78 }
     79 
     80 // Tests streaming a non-char pointer.
     81 TEST(MessageTest, StreamsPointer) {
     82   int n = 0;
     83   int* p = &n;
     84   EXPECT_NE("(null)", (Message() << p).GetString());
     85 }
     86 
     87 // Tests streaming a NULL non-char pointer.
     88 TEST(MessageTest, StreamsNullPointer) {
     89   int* p = NULL;
     90   EXPECT_EQ("(null)", (Message() << p).GetString());
     91 }
     92 
     93 // Tests streaming a C string.
     94 TEST(MessageTest, StreamsCString) {
     95   EXPECT_EQ("Foo", (Message() << "Foo").GetString());
     96 }
     97 
     98 // Tests streaming a NULL C string.
     99 TEST(MessageTest, StreamsNullCString) {
    100   char* p = NULL;
    101   EXPECT_EQ("(null)", (Message() << p).GetString());
    102 }
    103 
    104 // Tests streaming std::string.
    105 TEST(MessageTest, StreamsString) {
    106   const ::std::string str("Hello");
    107   EXPECT_EQ("Hello", (Message() << str).GetString());
    108 }
    109 
    110 // Tests that we can output strings containing embedded NULs.
    111 TEST(MessageTest, StreamsStringWithEmbeddedNUL) {
    112   const char char_array_with_nul[] =
    113       "Here's a NUL\0 and some more string";
    114   const ::std::string string_with_nul(char_array_with_nul,
    115                                       sizeof(char_array_with_nul) - 1);
    116   EXPECT_EQ("Here's a NUL\\0 and some more string",
    117             (Message() << string_with_nul).GetString());
    118 }
    119 
    120 // Tests streaming a NUL char.
    121 TEST(MessageTest, StreamsNULChar) {
    122   EXPECT_EQ("\\0", (Message() << '\0').GetString());
    123 }
    124 
    125 // Tests streaming int.
    126 TEST(MessageTest, StreamsInt) {
    127   EXPECT_EQ("123", (Message() << 123).GetString());
    128 }
    129 
    130 // Tests that basic IO manipulators (endl, ends, and flush) can be
    131 // streamed to Message.
    132 TEST(MessageTest, StreamsBasicIoManip) {
    133   EXPECT_EQ("Line 1.\nA NUL char \\0 in line 2.",
    134                (Message() << "Line 1." << std::endl
    135                          << "A NUL char " << std::ends << std::flush
    136                          << " in line 2.").GetString());
    137 }
    138 
    139 // Tests Message::GetString()
    140 TEST(MessageTest, GetString) {
    141   Message msg;
    142   msg << 1 << " lamb";
    143   EXPECT_EQ("1 lamb", msg.GetString());
    144 }
    145 
    146 // Tests streaming a Message object to an ostream.
    147 TEST(MessageTest, StreamsToOStream) {
    148   Message msg("Hello");
    149   ::std::stringstream ss;
    150   ss << msg;
    151   EXPECT_EQ("Hello", testing::internal::StringStreamToString(&ss));
    152 }
    153 
    154 // Tests that a Message object doesn't take up too much stack space.
    155 TEST(MessageTest, DoesNotTakeUpMuchStackSpace) {
    156   EXPECT_LE(sizeof(Message), 16U);
    157 }
    158 
    159 }  // namespace
    160