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comparison: media/webrtc/trunk/testing/gtest/samples/sample2_unittest.cc
media/webrtc/trunk/testing/gtest/samples/sample2_unittest.cc
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| 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 // Author: wan@google.com (Zhanyong Wan) | |
| 33 | |
| 34 | |
| 35 // This sample shows how to write a more complex unit test for a class | |
| 36 // that has multiple member functions. | |
| 37 // | |
| 38 // Usually, it's a good idea to have one test for each method in your | |
| 39 // class. You don't have to do that exactly, but it helps to keep | |
| 40 // your tests organized. You may also throw in additional tests as | |
| 41 // needed. | |
| 42 | |
| 43 #include "sample2.h" | |
| 44 #include "gtest/gtest.h" | |
| 45 | |
| 46 // In this example, we test the MyString class (a simple string). | |
| 47 | |
| 48 // Tests the default c'tor. | |
| 49 TEST(MyString, DefaultConstructor) { | |
| 50 const MyString s; | |
| 51 | |
| 52 // Asserts that s.c_string() returns NULL. | |
| 53 // | |
| 54 // <TechnicalDetails> | |
| 55 // | |
| 56 // If we write NULL instead of | |
| 57 // | |
| 58 // static_cast<const char *>(NULL) | |
| 59 // | |
| 60 // in this assertion, it will generate a warning on gcc 3.4. The | |
| 61 // reason is that EXPECT_EQ needs to know the types of its | |
| 62 // arguments in order to print them when it fails. Since NULL is | |
| 63 // #defined as 0, the compiler will use the formatter function for | |
| 64 // int to print it. However, gcc thinks that NULL should be used as | |
| 65 // a pointer, not an int, and therefore complains. | |
| 66 // | |
| 67 // The root of the problem is C++'s lack of distinction between the | |
| 68 // integer number 0 and the null pointer constant. Unfortunately, | |
| 69 // we have to live with this fact. | |
| 70 // | |
| 71 // </TechnicalDetails> | |
| 72 EXPECT_STREQ(NULL, s.c_string()); | |
| 73 | |
| 74 EXPECT_EQ(0u, s.Length()); | |
| 75 } | |
| 76 | |
| 77 const char kHelloString[] = "Hello, world!"; | |
| 78 | |
| 79 // Tests the c'tor that accepts a C string. | |
| 80 TEST(MyString, ConstructorFromCString) { | |
| 81 const MyString s(kHelloString); | |
| 82 EXPECT_EQ(0, strcmp(s.c_string(), kHelloString)); | |
| 83 EXPECT_EQ(sizeof(kHelloString)/sizeof(kHelloString[0]) - 1, | |
| 84 s.Length()); | |
| 85 } | |
| 86 | |
| 87 // Tests the copy c'tor. | |
| 88 TEST(MyString, CopyConstructor) { | |
| 89 const MyString s1(kHelloString); | |
| 90 const MyString s2 = s1; | |
| 91 EXPECT_EQ(0, strcmp(s2.c_string(), kHelloString)); | |
| 92 } | |
| 93 | |
| 94 // Tests the Set method. | |
| 95 TEST(MyString, Set) { | |
| 96 MyString s; | |
| 97 | |
| 98 s.Set(kHelloString); | |
| 99 EXPECT_EQ(0, strcmp(s.c_string(), kHelloString)); | |
| 100 | |
| 101 // Set should work when the input pointer is the same as the one | |
| 102 // already in the MyString object. | |
| 103 s.Set(s.c_string()); | |
| 104 EXPECT_EQ(0, strcmp(s.c_string(), kHelloString)); | |
| 105 | |
| 106 // Can we set the MyString to NULL? | |
| 107 s.Set(NULL); | |
| 108 EXPECT_STREQ(NULL, s.c_string()); | |
| 109 } |
