1 // Copyright 2005, Google Inc. 2 // All rights reserved. 3 // 4 // Redistribution and use in source and binary forms, with or without 5 // modification, are permitted provided that the following conditions are 6 // met: 7 // 8 // * Redistributions of source code must retain the above copyright 9 // notice, this list of conditions and the following disclaimer. 10 // * Redistributions in binary form must reproduce the above 11 // copyright notice, this list of conditions and the following disclaimer 12 // in the documentation and/or other materials provided with the 13 // distribution. 14 // * Neither the name of Google Inc. nor the names of its 15 // contributors may be used to endorse or promote products derived from 16 // this software without specific prior written permission. 17 // 18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 30 // A sample program demonstrating using Google C++ testing framework. 31 32 // This sample shows how to write a more complex unit test for a class 33 // that has multiple member functions. 34 // 35 // Usually, it's a good idea to have one test for each method in your 36 // class. You don't have to do that exactly, but it helps to keep 37 // your tests organized. You may also throw in additional tests as 38 // needed. 39 40 #include "sample2.h" 41 42 #include "gtest/gtest.h" 43 namespace { 44 // In this example, we test the MyString class (a simple string). 45 46 // Tests the default c'tor. 47 TEST(MyString, DefaultConstructor) { 48 const MyString s; 49 50 // Asserts that s.c_string() returns NULL. 51 // 52 // <TechnicalDetails> 53 // 54 // If we write NULL instead of 55 // 56 // static_cast<const char *>(NULL) 57 // 58 // in this assertion, it will generate a warning on gcc 3.4. The 59 // reason is that EXPECT_EQ needs to know the types of its 60 // arguments in order to print them when it fails. Since NULL is 61 // #defined as 0, the compiler will use the formatter function for 62 // int to print it. However, gcc thinks that NULL should be used as 63 // a pointer, not an int, and therefore complains. 64 // 65 // The root of the problem is C++'s lack of distinction between the 66 // integer number 0 and the null pointer constant. Unfortunately, 67 // we have to live with this fact. 68 // 69 // </TechnicalDetails> 70 EXPECT_STREQ(nullptr, s.c_string()); 71 72 EXPECT_EQ(0u, s.Length()); 73 } 74 75 const char kHelloString[] = "Hello, world!"; 76 77 // Tests the c'tor that accepts a C string. 78 TEST(MyString, ConstructorFromCString) { 79 const MyString s(kHelloString); 80 EXPECT_EQ(0, strcmp(s.c_string(), kHelloString)); 81 EXPECT_EQ(sizeof(kHelloString) / sizeof(kHelloString[0]) - 1, s.Length()); 82 } 83 84 // Tests the copy c'tor. 85 TEST(MyString, CopyConstructor) { 86 const MyString s1(kHelloString); 87 const MyString s2 = s1; 88 EXPECT_EQ(0, strcmp(s2.c_string(), kHelloString)); 89 } 90 91 // Tests the Set method. 92 TEST(MyString, Set) { 93 MyString s; 94 95 s.Set(kHelloString); 96 EXPECT_EQ(0, strcmp(s.c_string(), kHelloString)); 97 98 // Set should work when the input pointer is the same as the one 99 // already in the MyString object. 100 s.Set(s.c_string()); 101 EXPECT_EQ(0, strcmp(s.c_string(), kHelloString)); 102 103 // Can we set the MyString to NULL? 104 s.Set(nullptr); 105 EXPECT_STREQ(nullptr, s.c_string()); 106 } 107 } // namespace 108