doctest+FakeIt+nanobench（现代C++测试工具链）可以完美地替代gtest/gmock和google bench
没有任何依赖，无需安装，直接包含头文件就可以用，非常容易集成和使用

doctest

  1. #define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
  2. #include "doctest.h"
  4. TEST_CASE("vectors can be sized and resized") {
  5.     std::vector<int> v(5);
  7.     REQUIRE(v.size() == 5);
  8.     REQUIRE(v.capacity() >= 5);
  10.     SUBCASE("adding to the vector increases it's size") {
  11.         v.push_back(1);
  13.         CHECK(v.size() == 6);
  14.         CHECK(v.capacity() >= 6);
  15.     }
  16.     SUBCASE("reserving increases just the capacity") {
  17.         v.reserve(6);
  19.         CHECK(v.size() == 5);
  20.         CHECK(v.capacity() >= 6);
  21.     }
  22. }

SUBCASE

  • 允许在当前case下增加更多的子case去测试一些special一些的东西，非常实用，这也是相比gtest更好的一个地方。

断言宏

  1. CHECK宏是只检查并不会终止测试
  2. REQUIRE宏则会终止测试和gtest里面的ASSET_XX宏类似

这两个宏也是平时做单测时用得最多的两个宏了

除此之外，还有更丰富的宏。比如：

  1. <LEVEL> is one of 3 possible: REQUIRE/CHECK/WARN.
  3. <LEVEL>_EQ(left, right) - same as <LEVEL>(left == right)
  4. <LEVEL>_NE(left, right) - same as <LEVEL>(left != right)
  5. <LEVEL>_GT(left, right) - same as <LEVEL>(left > right)
  6. <LEVEL>_LT(left, right) - same as <LEVEL>(left < right)
  7. <LEVEL>_GE(left, right) - same as <LEVEL>(left >= right)
  8. <LEVEL>_LE(left, right) - same as <LEVEL>(left <= right)
  9. <LEVEL>_UNARY(expr) - same as <LEVEL>(expr)
  10. <LEVEL>_UNARY_FALSE(expr) - same as <LEVEL>_FALSE(expr)

判断异常的宏

  1. CHECK_THROWS_AS(func(), const std::exception&);
  2. CHECK_THROWS_AS(func(), std::exception); // same as above
  4. CHECK_THROWS_WITH(func(), "invalid operation!");
  6. CHECK_THROWS_WITH_AS(func(), "invalid operation!", std::runtime_error);
  8. <LEVEL>_NOTHROW(expression)

Fakelt(Mock库)

用doctest+FakeIt两个header only的库就可以完美替代gtest了。

FakeIt是C++11写的header only的mock库，用起来也很方便：

  1. struct SomeInterface {
  2.     virtual int foo(int) = 0;
  3.     virtual int bar(string) = 0;
  4. };
  6. Mock<SomeInterface> mock;
  8. When(Method(mock,foo)).Return(0);
  10. SomeInterface &i = mock.get();
  12. // Production code
  13. i.foo(1);
  15. // Verify method mock.foo was invoked.
  16. Verify(Method(mock,foo));
  18. // Verify method mock.foo was invoked with specific arguments.
  19. Verify(Method(mock,foo).Using(1));

nanobench

nanobench也是C++11写的header only的库，使用起来也很简单，包含头文件即可。

  1. #define ANKERL_NANOBENCH_IMPLEMENT
  2. #include <nanobench.h>
  4. int main() {
  5.     double d = 1.0;
  6.     ankerl::nanobench::Bench().run("some double ops", [&] {
  7.         d += 1.0 / d;
  8.         if (d > 5.0) {
  9.             d -= 5.0;
  10.         }
  11.         ankerl::nanobench::doNotOptimizeAway(d);
  12.     });
  13. }

参考文章

  1. 现代C++测试工具链(是时候抛弃gtest/google bench了)