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