在heroku上运行golang测试

Question

I more or less followed these instructions to deploy my app to heroku. Everything works well.

http://mmcgrana.github.io/2012/09/getting-started-with-go-on-heroku.html

I've got some benchmarking tests that I'd like to run on heroku to test whether or not there's a difference in performance between my local machine and the heroku box. Unfortunately I can't figure out how to run them (heroku can't find the go executable). Is it possible to do this?

Thanks!

Answer 1

I haven't used Heroku. It's possible that Heroku has a problem running a benchmark using the go test command; there may be a problem with the temporary directory.

Command go

Test packages

'Go test' recompiles each package along with any files with names matching the file pattern "*test.go". Files whose names begin with "" (including "_test.go") or "." are ignored. These additional files can contain test functions, benchmark functions, and example functions. See 'go help testfunc' for more. Each listed package causes the execution of a separate test binary.

The package is built in a temporary directory so it does not interfere with the non-test installation.

Try running the benchmark tests in a program. For example,

package main

import (
    "fmt"
    "math"
    "testing"
)

// a function to be benchmarked
func Area(r float64) float64 {
    return math.Pi * r * r
}

// benchmark function
func BenchmarkArea(b *testing.B) {
    r := 42.0
    for i := 0; i < b.N; i++ {
        _ = Area(r)
    }
}

func main() {
    br := testing.Benchmark(BenchmarkArea)
    fmt.Println(br.String() + br.MemString())
}

Output:

2000000000           1.21 ns/op       0 B/op           0 allocs/op

Package testing

func Benchmark

func Benchmark(f func(b *B)) BenchmarkResult

Benchmark benchmarks a single function. Useful for creating custom benchmarks that do not use the "go test" command.