proxygen
sample2_unittest.cc
Go to the documentation of this file.
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 }
const char kHelloString[]
#define EXPECT_EQ(val1, val2)
Definition: gtest.h:1922
#define EXPECT_STREQ(s1, s2)
Definition: gtest.h:1995
TEST(MyString, DefaultConstructor)
void Set(const char *c_string)
Definition: sample2.cc:51
size_t Length() const
Definition: sample2.h:76
static set< string > s
const char * c_string() const
Definition: sample2.h:74