運用 Google Test 實作單元測試
| 實習目標 | 1. 安裝配合 Visual Studio 2010 或是 GNU g++ 的 Google Test 2. 了解 TEST() 巨集定義的 TestCase 與 Test 的運作架構 3. 了解 TEST_F() 巨集定義的 TestCase 與 Test, 以及由 ::testing::Test 衍生出來的 TestFixture 類別的運作架構 4. 運用 RUN_ALL_TESTS() 巨集來執行所有測試 |
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| 步驟一 | Google test 的全名是 Google C++ Testing Framework, 是 Google 根據 xUnit 架構開發出來的單元測試環境 支援的軟體平台: Linux, Mac OS X, Windows, Cygwin, Windows CE, and Symbian 目前運用這個單元測試環境的成功專案包括
同樣是和 JUnit, CppUnit 相同的 xUnit 架構, Google test 對一開始使用的人最大的好處是 使用方法較為簡化, 允許非致命性的錯誤 版本: 2013/09 gtest-1.7.0.zip (local copy), 2011/04 gtest-1.6.0.zip 安裝 請下載 gtest-1.7.0.zip, 解壓縮之後, 到 msvc\ 資料匣裡面點選專案檔 gtest.sln, Visual Studio 2010 會開啟它, 並且自動轉換為 visual sutdio 2010 的專案檔, 共有 gtest, gtest_main, gtest_prod_test, gtest_unitttest 四個專案
googletest 在 code.google.com 上的網址為 https://code.google.com/p/googletest/ googletest 的參考資料請見 https://code.google.com/p/googletest/w/list google test framework Primer, V1_5_Primer, V1_6_Primer 中文版 , V1_7_Primer |
| 步驟二 | 基本運用概念
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| 步驟三 | 設計整合多個測試的類別 ComplexMultiUnitTests.h
#include "gtest/gtest.h"
#include "Complex.h"
class ComplexMultiUnitTests: public ::testing::Test
{
protected:
ComplexMultiUnitTests()
{
// You can do set-up work for each test here.
cout << "\t[ComplexMultiUnitTests] Constructor..." << endl;
}
virtual ~ComplexMultiUnitTests()
{
// You can do clean-up work that doesn't throw exception here.
cout << "\t[ComplexMultiUnitTests] Deconstructor..." << endl;
}
// If the constructor and destructor are not enough for setting up
// and cleaning up each test, you can define the following methods.
// Code here will be called immediately after the constructor (right before each test)
virtual void SetUp();
// Code here will be called immediately after each test (right before the destructor)
virtual void TearDown();
// Objects declared here can be used by all tests in the test case for Complex.
Complex x1, x2, x3;
};
ComplexMultiUnitTests.cpp
#include "ComplexMultiUnitTests.h"
void ComplexMultiUnitTests::SetUp()
{
cout << "\t[ComplexMultiUnitTests] Setup resources..." << endl;
x1.setValue(7, 3);
x2.setValue(2, 5);
x3.setValue(5, -2);
}
void ComplexMultiUnitTests::TearDown()
{
cout << "\t[ComplexMultiUnitTests] Teardown resources..." << endl;
} |
| 步驟四 | 製作測試 TEST_F(ComplexMultiUnitTests, testAdd)
{
x1.add(x2);
Complex x4;
x4.setValue(9,8);
ASSERT_TRUE(x1.equal(x4,1e-10));
EXPECT_EQ(x1.equal(x4,1e-10),1) ;
}
TEST_F(ComplexMultiUnitTests, testSubtract)
{
x1.subtract(x2);
ASSERT_TRUE(x1.equal(x3,1e-10));
}
TEST_F(ComplexMultiUnitTests, testMultiply)
{
x2.multiply(x3);
Complex x4;
x4.setValue(20,21);
ASSERT_TRUE(x4.equal(x2,1e-10));
}
TEST_F(ComplexMultiUnitTests, testDivide)
{
ASSERT_TRUE(x1.divide(x2));
Complex x4;
x4.setValue(1,-1);
ASSERT_TRUE(x1.equal(x4,1e-10));
x2.setValue(0, 0);
ASSERT_TRUE(!x1.divide(x2));
}
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| 步驟五 | 在 main 函式中運用 testing::InitGoogleTest 來處理命令列中 Google
Test 特定的參數, 執行 RUN_ALL_TESTS() #include "gtest/gtest.h" int main(int argc, char** argv) [----------] Global test environment tear-down |
| 步驟六 | 專案的屬性設定
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