func testState(t *testing.T, tb *tomb.Tomb, wantDying, wantDead bool, wantErr error) {
select {
case <-tb.Dying():
if !wantDying {
t.Error("<-Dying: should block")
}
default:
if wantDying {
t.Error("<-Dying: should not block")
}
}
seemsDead := false
select {
case <-tb.Dead():
if !wantDead {
t.Error("<-Dead: should block")
}
seemsDead = true
default:
if wantDead {
t.Error("<-Dead: should not block")
}
}
if err := tb.Err(); err != wantErr {
t.Errorf("Err: want %#v, got %#v", wantErr, err)
}
if wantDead && seemsDead {
waitErr := tb.Wait()
switch {
case waitErr == tomb.ErrStillAlive:
t.Errorf("Wait should not return ErrStillAlive")
case !reflect.DeepEqual(waitErr, wantErr):
t.Errorf("Wait: want %#v, got %#v", wantErr, waitErr)
}
}
}
