go - 如何自动启用测试在包内并行运行？

Question

我想在包中并行运行测试。我们知道testing.Parallel function使我们能够并行运行包中的两个测试，但是有没有一种方法可以自动使包中的所有测试并行运行而不调用 t.Parallel() ？

例如，我是否可以将任何标志放入 go test 中，以使具有函数签名 func(t *testing.T) 的所有测试并行运行？

Answer 1

这来自commit f80d8fb和 Go1(2011 年 10 月)

选项(--parallel)是debated at the time ，但很快就被拒绝了:

Many tests won't work if run in parallel. (Many will, too.)
The presence of a --parallel flag means scripts and so on will want to turn it on, and tests must be able to protect themselves from erroneous runs.

I suggest whitelisting individual tests that are knowingly able to run in parallel, and the easiest way to do this is to name them differently.

I like t.Parallel.
It's clear which tests are parallel, it's not a global default, so you can apply it just to the tests where it is both appropriate and necessary, and the behavior is great: all the non-parallel run first - meaning the easy ones - and then the parallel ones can chew cpu.