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google/googletest/dist/googletest/samples/sample2_unittest.cc
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// Copyright 2005, Google Inc. | |||||
// All rights reserved. | |||||
// | |||||
// Redistribution and use in source and binary forms, with or without | |||||
// modification, are permitted provided that the following conditions are | |||||
// met: | |||||
// | |||||
// * Redistributions of source code must retain the above copyright | |||||
// notice, this list of conditions and the following disclaimer. | |||||
// * Redistributions in binary form must reproduce the above | |||||
// copyright notice, this list of conditions and the following disclaimer | |||||
// in the documentation and/or other materials provided with the | |||||
// distribution. | |||||
// * Neither the name of Google Inc. nor the names of its | |||||
// contributors may be used to endorse or promote products derived from | |||||
// this software without specific prior written permission. | |||||
// | |||||
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |||||
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |||||
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |||||
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |||||
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |||||
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |||||
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |||||
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |||||
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |||||
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |||||
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |||||
// A sample program demonstrating using Google C++ testing framework. | |||||
// This sample shows how to write a more complex unit test for a class | |||||
// that has multiple member functions. | |||||
// | |||||
// Usually, it's a good idea to have one test for each method in your | |||||
// class. You don't have to do that exactly, but it helps to keep | |||||
// your tests organized. You may also throw in additional tests as | |||||
// needed. | |||||
#include "sample2.h" | |||||
#include "gtest/gtest.h" | |||||
namespace { | |||||
// In this example, we test the MyString class (a simple string). | |||||
// Tests the default c'tor. | |||||
TEST(MyString, DefaultConstructor) { | |||||
const MyString s; | |||||
// Asserts that s.c_string() returns NULL. | |||||
// | |||||
// <TechnicalDetails> | |||||
// | |||||
// If we write NULL instead of | |||||
// | |||||
// static_cast<const char *>(NULL) | |||||
// | |||||
// in this assertion, it will generate a warning on gcc 3.4. The | |||||
// reason is that EXPECT_EQ needs to know the types of its | |||||
// arguments in order to print them when it fails. Since NULL is | |||||
// #defined as 0, the compiler will use the formatter function for | |||||
// int to print it. However, gcc thinks that NULL should be used as | |||||
// a pointer, not an int, and therefore complains. | |||||
// | |||||
// The root of the problem is C++'s lack of distinction between the | |||||
// integer number 0 and the null pointer constant. Unfortunately, | |||||
// we have to live with this fact. | |||||
// | |||||
// </TechnicalDetails> | |||||
EXPECT_STREQ(NULL, s.c_string()); | |||||
EXPECT_EQ(0u, s.Length()); | |||||
} | |||||
const char kHelloString[] = "Hello, world!"; | |||||
// Tests the c'tor that accepts a C string. | |||||
TEST(MyString, ConstructorFromCString) { | |||||
const MyString s(kHelloString); | |||||
EXPECT_EQ(0, strcmp(s.c_string(), kHelloString)); | |||||
EXPECT_EQ(sizeof(kHelloString)/sizeof(kHelloString[0]) - 1, | |||||
s.Length()); | |||||
} | |||||
// Tests the copy c'tor. | |||||
TEST(MyString, CopyConstructor) { | |||||
const MyString s1(kHelloString); | |||||
const MyString s2 = s1; | |||||
EXPECT_EQ(0, strcmp(s2.c_string(), kHelloString)); | |||||
} | |||||
// Tests the Set method. | |||||
TEST(MyString, Set) { | |||||
MyString s; | |||||
s.Set(kHelloString); | |||||
EXPECT_EQ(0, strcmp(s.c_string(), kHelloString)); | |||||
// Set should work when the input pointer is the same as the one | |||||
// already in the MyString object. | |||||
s.Set(s.c_string()); | |||||
EXPECT_EQ(0, strcmp(s.c_string(), kHelloString)); | |||||
// Can we set the MyString to NULL? | |||||
s.Set(NULL); | |||||
EXPECT_STREQ(NULL, s.c_string()); | |||||
} | |||||
} // namespace |