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