I tried to run a test file with multiple files

[pjebs]

Error
due to Go Playground bug, unit test snippets can't have multiple files.
Please remove other Go files or use WebAssembly environment instead.

See: https://github.com/golang/go/issues/32403

Is this still relevant? The sample code within that Github issue now works.

[x1unix]

@pjebs at the moment, it still doesn't work reliably as expected.

The problem is that their "fix" works only if the first file doesn't have a filename, e.g:

package main

import "testing"
import "my_package"

func TestFoo(t *testing.T) {
...
}
-- my_package/file.go --
package my package

The goplay.tools frontend, adds filenames everywhere because there is no way to identify what file is actually main one:

-- main_test.go --
package main

import (
	"testing"

	_ "play.ground/pkg"
)

func TestFoo(t *testing.T) {
}
-- go.mod --
module play.ground
-- pkg/x.go --
package pkg

Proof: https://go.dev/play/p/alRl0ka0p8J

In that case, the Google backend still reports the same no non-test Go files error.

I'll report the issue to the upstream, but meanwhile, I suggest you to use WebAssembly runtime if possible.

[x1unix]

See: golang/go#77234

[github-actions]

This issue is stale because it has been open for 15 days with no activity. It will be closed if no further activity occurs. Thank you.

[ckotugeh]

Just import do not use blank _

import (
" testing"
"play.ground/pkg"
)