使用 Bazel 和 GTest 的 C++ 项目
C++ project with Bazel and GTest
我想用 gtest 创建一个 Bazel C++ 项目来进行单元测试。
什么是最小设置?
(我的电脑上只安装了Bazel,我在Linux下面是运行)
项目结构为:
.
├── bin
│ ├── BUILD
│ ├── hello.cpp
├── MyLib
│ ├── BUILD
│ ├── message.hpp
│ ├── message.cpp
│ ├── ...
├── test
│ ├── BUILD
│ ├── message_test.cpp
│ ├── ...
├── gmock.BUILD
└── WORKSPACE
Bazel+GTest相关文件
- 工作空间
你从 github:
下载 gtest
new_git_repository(
name = "googletest",
build_file = "gmock.BUILD",
remote = "https://github.com/google/googletest",
tag = "release-1.8.0",
)
您定义了一个 gmock BUILD 文件,定义如下:
- gmock.BUILD
这个BUILD文件负责编译gtest/gmock:
cc_library(
name = "gtest",
srcs = [
"googletest/src/gtest-all.cc",
"googlemock/src/gmock-all.cc",
],
hdrs = glob([
"**/*.h",
"googletest/src/*.cc",
"googlemock/src/*.cc",
]),
includes = [
"googlemock",
"googletest",
"googletest/include",
"googlemock/include",
],
linkopts = ["-pthread"],
visibility = ["//visibility:public"],
)
cc_library(
name = "gtest_main",
srcs = ["googlemock/src/gmock_main.cc"],
linkopts = ["-pthread"],
visibility = ["//visibility:public"],
deps = [":gtest"],
)
- test/BUILD
此构建文件生成测试:
cc_test(
name = "MyTest",
srcs = glob(["**/*.cpp"]),
deps = ["//MyLib:MyLib",
"@googletest//:gtest_main"],
)
test/message_test.cpp 文件定义为:
#include "gtest/gtest.h"
#include "MyLib/message.hpp"
TEST(message_test,content)
{
EXPECT_EQ(get_message(),"Hello World!");
}
仅此而已!其他文件照常定义:
支持示例的文件
- MyLib/BUILD
创建 libMyLib.so 和 libMyLib.a 库。
cc_library(
name="MyLib",
hdrs=glob(["**/*.hpp"]),
srcs=glob(["**/*.cpp"]),
visibility = ["//visibility:public"],
)
有基础message.hpp
#include <string>
std::string get_message();
和message.cpp
#include "MyLib/message.hpp"
std::string get_message()
{
return "Hello World!";
}
示例。
- bin/BUILD
创建 hello 可执行文件。
cc_binary(
name = "hello",
srcs = ["hello.cpp"],
deps = ["//MyLib:MyLib"],
)
即:
#include "MyLib/message.hpp"
#include <iostream>
int main()
{
std::cout << "\n" << get_message() << std::endl;
return EXIT_SUCCESS;
}
用法:
- 编译所有目标:
这还将从其 github 存储库下载 gtest 并编译它
bazel build ...
- 检查 hello 目标:
你可以运行它:
bazel run bin:hello
- 运行 您使用 GTest 进行的测试
这是这篇笔记的要点:
bazel test ... --test_output=errors
你应该得到类似的东西:
INFO: Analysed 3 targets (0 packages loaded).
INFO: Found 2 targets and 1 test target...
INFO: Elapsed time: 0.205s, Critical Path: 0.05s
INFO: Build completed successfully, 2 total actions
//test:MyTest
PASSED in 0.0s
Executed 1 out of 1 test: 1 test passes.
重现结果
为了您的方便,我创建了一个包含此示例的 github repo。我希望它开箱即用。
现在 googletest 提供了一个 BUILD 文件,这就更容易了:
在WORKSPACE
load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")
git_repository(
name = "gtest",
remote = "https://github.com/google/googletest",
branch = "v1.10.x",
)
构建中
cc_test (
name = "hello_test",
srcs = [
"hello_test.cc",
],
deps = [
"@gtest//:gtest",
"@gtest//:gtest_main" # Only if hello_test.cc has no main()
],
)
我想用 gtest 创建一个 Bazel C++ 项目来进行单元测试。
什么是最小设置?
(我的电脑上只安装了Bazel,我在Linux下面是运行)
项目结构为:
.
├── bin
│ ├── BUILD
│ ├── hello.cpp
├── MyLib
│ ├── BUILD
│ ├── message.hpp
│ ├── message.cpp
│ ├── ...
├── test
│ ├── BUILD
│ ├── message_test.cpp
│ ├── ...
├── gmock.BUILD
└── WORKSPACE
Bazel+GTest相关文件
- 工作空间
你从 github:
下载 gtestnew_git_repository(
name = "googletest",
build_file = "gmock.BUILD",
remote = "https://github.com/google/googletest",
tag = "release-1.8.0",
)
您定义了一个 gmock BUILD 文件,定义如下:
- gmock.BUILD
这个BUILD文件负责编译gtest/gmock:
cc_library(
name = "gtest",
srcs = [
"googletest/src/gtest-all.cc",
"googlemock/src/gmock-all.cc",
],
hdrs = glob([
"**/*.h",
"googletest/src/*.cc",
"googlemock/src/*.cc",
]),
includes = [
"googlemock",
"googletest",
"googletest/include",
"googlemock/include",
],
linkopts = ["-pthread"],
visibility = ["//visibility:public"],
)
cc_library(
name = "gtest_main",
srcs = ["googlemock/src/gmock_main.cc"],
linkopts = ["-pthread"],
visibility = ["//visibility:public"],
deps = [":gtest"],
)
- test/BUILD
此构建文件生成测试:
cc_test(
name = "MyTest",
srcs = glob(["**/*.cpp"]),
deps = ["//MyLib:MyLib",
"@googletest//:gtest_main"],
)
test/message_test.cpp 文件定义为:
#include "gtest/gtest.h"
#include "MyLib/message.hpp"
TEST(message_test,content)
{
EXPECT_EQ(get_message(),"Hello World!");
}
仅此而已!其他文件照常定义:
支持示例的文件
- MyLib/BUILD
创建 libMyLib.so 和 libMyLib.a 库。
cc_library(
name="MyLib",
hdrs=glob(["**/*.hpp"]),
srcs=glob(["**/*.cpp"]),
visibility = ["//visibility:public"],
)
有基础message.hpp
#include <string>
std::string get_message();
和message.cpp
#include "MyLib/message.hpp"
std::string get_message()
{
return "Hello World!";
}
示例。
- bin/BUILD
创建 hello 可执行文件。
cc_binary(
name = "hello",
srcs = ["hello.cpp"],
deps = ["//MyLib:MyLib"],
)
即:
#include "MyLib/message.hpp"
#include <iostream>
int main()
{
std::cout << "\n" << get_message() << std::endl;
return EXIT_SUCCESS;
}
用法:
- 编译所有目标:
这还将从其 github 存储库下载 gtest 并编译它
bazel build ...
- 检查 hello 目标:
你可以运行它:
bazel run bin:hello
- 运行 您使用 GTest 进行的测试
这是这篇笔记的要点:
bazel test ... --test_output=errors
你应该得到类似的东西:
INFO: Analysed 3 targets (0 packages loaded).
INFO: Found 2 targets and 1 test target...
INFO: Elapsed time: 0.205s, Critical Path: 0.05s
INFO: Build completed successfully, 2 total actions
//test:MyTest
PASSED in 0.0s
Executed 1 out of 1 test: 1 test passes.
重现结果
为了您的方便,我创建了一个包含此示例的 github repo。我希望它开箱即用。
现在 googletest 提供了一个 BUILD 文件,这就更容易了:
在WORKSPACE
load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")
git_repository(
name = "gtest",
remote = "https://github.com/google/googletest",
branch = "v1.10.x",
)
构建中
cc_test (
name = "hello_test",
srcs = [
"hello_test.cc",
],
deps = [
"@gtest//:gtest",
"@gtest//:gtest_main" # Only if hello_test.cc has no main()
],
)