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This package implements a C++ mini unittest and benchmark library.
Talk: C++迷你单元测试和基准测试库 .
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
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;
}
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.
./a.out -help
usage: a.out
[-list=.*]
[-test=.*]
[-test.bench=]
[-test.benchtime=1second]
[-help]
[-h]
Please report bugs to chaishushan@gmail.com.
Thanks!