GoogleTest（一）

出一期GoogleTest的应用
## Google Test SDK
```shell
git clone https://github.com/google/googletest.git
cd googletest        # Main directory of the cloned repository.
mkdir build          # Create a directory to hold the build output.
cd build
cmake -DCMAKE_INSTALL_PREFIX=../../fake-root ..             # Generate native build scripts for GoogleTest.
make
make install
```

## 验证SDK

### 目录结构

![](/media/202408/2024-08-02_155605_8106940.7181889069064337.png)

### example.cpp
./example/example1/example.cpp
```cpp
#include <gtest/gtest.h>

// 测试用例示例：检查整数相等
TEST(ExampleTest, IntEquality) {
    int a = 10;
    int b = 10;

EXPECT_EQ(a, b);  // 使用EXPECT_EQ断言检查a和b是否相等
}

// 测试用例示例：检查浮点数比较
TEST(ExampleTest, FloatComparison) {
    float x = 0.1f + 0.2f;
    float y = 0.3f;

EXPECT_FLOAT_EQ(x, y);  // 使用EXPECT_FLOAT_EQ断言检查x和y是否相等
}

// 测试用例示例：检查字符串相等
TEST(ExampleTest, StringEquality) {
    std::string str1 = "Hello";
    std::string str2 = "Hello";

EXPECT_EQ(str1, str2);  // 使用EXPECT_EQ断言检查str1和str2是否相等
}

// 入口函数，用于执行所有测试
int main(int argc, char** argv) {
    ::testing::InitGoogleTest(&argc, argv);
    return RUN_ALL_TESTS();
}
```

### Makefile
如果说你不想自己写main函数的话，需要再Makefile中多链一个libgtest_main.a的库，原来的gtest还是不能少的。即需要添加`-lgtest -lgtest_main`
```
CXX = g++
CXXFLAGS = -std=c++14 -Wall -Wextra 
LDFLAGS = -pthread  # GoogleTest需要链接pthread库

# 路径和文件名
SRC_DIR = .
BUILD_DIR = build
TARGET = example
TEST_TARGET = $(BUILD_DIR)/$(TARGET)_test

# GoogleTest库的路径和名称
GTEST_DIR = $(shell pwd)/../../fake-root
GTEST_LIB = -L$(GTEST_DIR)/lib/ \
			-lgtest
GTEST_INCLUDE = $(GTEST_DIR)/include

# 源文件和测试文件
SRCS = $(wildcard $(SRC_DIR)/*.cpp)
OBJS = $(SRCS:$(SRC_DIR)/%.cpp=$(BUILD_DIR)/%.o)

# 默认目标：构建测试
all: $(TEST_TARGET)
	@echo "Running tests..."
	./$(TEST_TARGET)

# 生成依赖关系
$(BUILD_DIR)/%.o: $(SRC_DIR)/%.cpp | $(BUILD_DIR)
	$(CXX) $(CXXFLAGS) -I$(GTEST_INCLUDE) -c $< -o $@

# 构建测试目标
$(TEST_TARGET): $(OBJS)
	$(CXX) $(CXXFLAGS) $^ $(GTEST_LIB) $(LDFLAGS) -o $@

# 创建构建目录
$(BUILD_DIR):
	mkdir -p $(BUILD_DIR)

# 清理生成的文件
clean:
	rm -rf $(BUILD_DIR)

.PHONY: all clean

```

### 运行输出

![](/media/202408/2024-08-02_161824_0064470.6467409841888813.png)

部署正确