testing: expose common struct as interface #56516
Description
I recently found myself doing the following in one of our test suites
func Foo[T testing.T | testing.B | testing.F](t *T) *Bar {
// test prep stuff
var cleanupFn func(func())
switch any(t).(type) {
case *testing.T:
cleanupFn = any(t).(*testing.T).Cleanup
case *testing.B:
cleanupFn = any(t).(*testing.B).Cleanup
case *testing.F:
cleanupFn = any(t).(*testing.F).Cleanup
default:
log.Fatalf("Error: unsupported type %T", t)
}
cleanupFn(func(){
// test cleanup stuff
})The cleanup function is common to all of these and is part of the common struct, which is embedded in each of testingT, testing.B, and testing.F.
I was wondering if common could potentially be exposed as an interface?
I'm happy to take a first stab at the PR if this is something the library mainteras would be open to, unless there's a technical reason this shouldn't be the case. Please lmk!