153 lines
5 KiB
C++
153 lines
5 KiB
C++
// 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.
|
|
//
|
|
// Author: wan@google.com (Zhanyong Wan)
|
|
|
|
|
|
// This sample shows how to write a simple unit test for a function,
|
|
// using Google C++ testing framework.
|
|
//
|
|
// Writing a unit test using Google C++ testing framework is easy as 1-2-3:
|
|
|
|
|
|
// Step 1. Include necessary header files such that the stuff your
|
|
// test logic needs is declared.
|
|
//
|
|
// Don't forget gtest.h, which declares the testing framework.
|
|
|
|
#include <limits.h>
|
|
#include "sample1.h"
|
|
#include "gtest/gtest.h"
|
|
|
|
|
|
// Step 2. Use the TEST macro to define your tests.
|
|
//
|
|
// TEST has two parameters: the test case name and the test name.
|
|
// After using the macro, you should define your test logic between a
|
|
// pair of braces. You can use a bunch of macros to indicate the
|
|
// success or failure of a test. EXPECT_TRUE and EXPECT_EQ are
|
|
// examples of such macros. For a complete list, see gtest.h.
|
|
//
|
|
// <TechnicalDetails>
|
|
//
|
|
// In Google Test, tests are grouped into test cases. This is how we
|
|
// keep test code organized. You should put logically related tests
|
|
// into the same test case.
|
|
//
|
|
// The test case name and the test name should both be valid C++
|
|
// identifiers. And you should not use underscore (_) in the names.
|
|
//
|
|
// Google Test guarantees that each test you define is run exactly
|
|
// once, but it makes no guarantee on the order the tests are
|
|
// executed. Therefore, you should write your tests in such a way
|
|
// that their results don't depend on their order.
|
|
//
|
|
// </TechnicalDetails>
|
|
|
|
|
|
// Tests Factorial().
|
|
|
|
// Tests factorial of negative numbers.
|
|
TEST(FactorialTest, Negative) {
|
|
// This test is named "Negative", and belongs to the "FactorialTest"
|
|
// test case.
|
|
EXPECT_EQ(1, Factorial(-5));
|
|
EXPECT_EQ(1, Factorial(-1));
|
|
EXPECT_GT(Factorial(-10), 0);
|
|
|
|
// <TechnicalDetails>
|
|
//
|
|
// EXPECT_EQ(expected, actual) is the same as
|
|
//
|
|
// EXPECT_TRUE((expected) == (actual))
|
|
//
|
|
// except that it will print both the expected value and the actual
|
|
// value when the assertion fails. This is very helpful for
|
|
// debugging. Therefore in this case EXPECT_EQ is preferred.
|
|
//
|
|
// On the other hand, EXPECT_TRUE accepts any Boolean expression,
|
|
// and is thus more general.
|
|
//
|
|
// </TechnicalDetails>
|
|
}
|
|
|
|
// Tests factorial of 0.
|
|
TEST(FactorialTest, Zero) {
|
|
EXPECT_EQ(1, Factorial(0));
|
|
}
|
|
|
|
// Tests factorial of positive numbers.
|
|
TEST(FactorialTest, Positive) {
|
|
EXPECT_EQ(1, Factorial(1));
|
|
EXPECT_EQ(2, Factorial(2));
|
|
EXPECT_EQ(6, Factorial(3));
|
|
EXPECT_EQ(40320, Factorial(8));
|
|
}
|
|
|
|
|
|
// Tests IsPrime()
|
|
|
|
// Tests negative input.
|
|
TEST(IsPrimeTest, Negative) {
|
|
// This test belongs to the IsPrimeTest test case.
|
|
|
|
EXPECT_FALSE(IsPrime(-1));
|
|
EXPECT_FALSE(IsPrime(-2));
|
|
EXPECT_FALSE(IsPrime(INT_MIN));
|
|
}
|
|
|
|
// Tests some trivial cases.
|
|
TEST(IsPrimeTest, Trivial) {
|
|
EXPECT_FALSE(IsPrime(0));
|
|
EXPECT_FALSE(IsPrime(1));
|
|
EXPECT_TRUE(IsPrime(2));
|
|
EXPECT_TRUE(IsPrime(3));
|
|
}
|
|
|
|
// Tests positive input.
|
|
TEST(IsPrimeTest, Positive) {
|
|
EXPECT_FALSE(IsPrime(4));
|
|
EXPECT_TRUE(IsPrime(5));
|
|
EXPECT_FALSE(IsPrime(6));
|
|
EXPECT_TRUE(IsPrime(23));
|
|
}
|
|
|
|
// Step 3. Call RUN_ALL_TESTS() in main().
|
|
//
|
|
// We do this by linking in src/gtest_main.cc file, which consists of
|
|
// a main() function which calls RUN_ALL_TESTS() for us.
|
|
//
|
|
// This runs all the tests you've defined, prints the result, and
|
|
// returns 0 if successful, or 1 otherwise.
|
|
//
|
|
// Did you notice that we didn't register the tests? The
|
|
// RUN_ALL_TESTS() macro magically knows about all the tests we
|
|
// defined. Isn't this convenient?
|