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C++ Mini UnitTest and Benchmark Library

This package implements a C++ mini unittest and benchmark library.

Talk: C++迷你单元测试和基准测试库 .

Unittest

Use TEST define a unit test:

#include "test.h"

// 1, 1, 2, 3, 5, ...
int Fibonacci(int i) {
	return (i < 2)? 1: Fibonacci(i-1) + Fibonacci(i-2);
}

TEST(Fibonacci, Simple) {
	ASSERT_TRUE(Fibonacci(0) == 1);
	ASSERT_TRUE(Fibonacci(1) == 1);
	ASSERT_TRUE(Fibonacci(2) == 2);
	ASSERT_TRUE(Fibonacci(3) == 3);
	ASSERT_TRUE(Fibonacci(4) == 5);
	ASSERT_TRUE(Fibonacci(5) == 8);
}

TEST(Fibonacci, All) {
	static const int fib[] = { 1, 1, 2, 3, 5, ... };
	for(int i = 0; i < sizeof(fib)/sizeof(fib[0]); ++i) {
		ASSERT_TRUE_MSG(Fibonacci(i) == fib[i],
			"failed on fib[%d], expected = %d, got = %d",
			i, fib[i], Fibonacci(i)
		);
	}
}

Run test: ./a.out (or ./a.out -test=regexp):

[test] Fibonacci.Simple ok
[test] Fibonacci.All ok
PASS

Benchmark

Use BENCH define a bench test:

BENCH(Fibonacci, 5) {
	for(int i = 0; i < BenchN(); ++i) {
		Fibonacci(5);
	}
}
BENCH(Fibonacci, 10) {
	for(int i = 0; i < BenchN(); ++i) {
		Fibonacci(10);
	}
}
BENCH(Fibonacci, 15) {
	for(int i = 0; i < BenchN(); ++i) {
		Fibonacci(15);
	}
}

Run benchmark: ./a.out -test.bench:

[bench] Fibonacci.5 20000000 65.5 ns/op
[bench] Fibonacci.10 2000000 763 ns/op
[bench] Fibonacci.15 200000 8740 ns/op

The output means that the loop ran 20000000 times at a speed of 65.5 ns per loop.

If a benchmark needs some expensive setup before running, the timer may be reset:

BENCH(Name, case1) {
	auto big = NewBig();
	BenchResetTimer();

	for(int i = 0; i < BenchN(); ++i) {
		big.Len();
	}
}

BENCH(Name, case2) {
	BenchStopTimer();
	auto big = NewBig();
	BenchStartTimer();

	for(int i = 0; i < BenchN(); ++i) {
		big.Len();
	}
	BenchStopTimer();
	delete big;
}

Init and Exit

We can use INIT define a init func, and use EXIT define a exit func:

INIT(Fibonacci, init) {
	// do some init work
}
EXIT(Fibonacci, exit) {
	// do some clean work
}

The init funcs run before the tests, the exit funcs run after the tests.

Usage

./a.out -help
usage: a.out
  [-list=.*]
  [-test=.*]
  [-test.bench=]
  [-test.benchtime=1second]
  [-help]
  [-h]

BUGS

Please report bugs to [email protected].

Thanks!