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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 // A helper function that turns a Message into a C string.
     43 const 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.
     52 TEST(MessageTest, DefaultConstructor) {
     53   const Message msg;
     54   EXPECT_STREQ("", ToCString(msg));
     55 }
     56 
     57 // Tests the copy constructor.
     58 TEST(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.
     65 TEST(MessageTest, ConstructsFromCString) {
     66   Message msg("Hello");
     67   EXPECT_STREQ("Hello", ToCString(msg));
     68 }
     69 
     70 // Tests streaming a float.
     71 TEST(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.
     79 TEST(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.
     88 TEST(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.
     95 TEST(MessageTest, StreamsNullPointer) {
     96   int* p = NULL;
     97   EXPECT_STREQ("(null)", ToCString(Message() << p));
     98 }
     99 
    100 // Tests streaming a C string.
    101 TEST(MessageTest, StreamsCString) {
    102   EXPECT_STREQ("Foo", ToCString(Message() << "Foo"));
    103 }
    104 
    105 // Tests streaming a NULL C string.
    106 TEST(MessageTest, StreamsNullCString) {
    107   char* p = NULL;
    108   EXPECT_STREQ("(null)", ToCString(Message() << p));
    109 }
    110 
    111 // Tests streaming std::string.
    112 TEST(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.
    118 TEST(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.
    128 TEST(MessageTest, StreamsNULChar) {
    129   EXPECT_STREQ("\\0", ToCString(Message() << '\0'));
    130 }
    131 
    132 // Tests streaming int.
    133 TEST(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.
    139 TEST(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()
    147 TEST(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.
    154 TEST(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.
    162 TEST(MessageTest, DoesNotTakeUpMuchStackSpace) {
    163   EXPECT_LE(sizeof(Message), 16U);
    164 }
    165 
    166 }  // namespace
    167