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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,

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 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 // A sample program demonstrating using Google C++ testing framework.

 //

 // Author: wan@google.com (Zhanyong Wan)

 // 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"

 // 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());

 }