package testutil type Point struct { Name string Value interface{} Tags map[string]string } type Accumulator struct { Points []*Point } func (a *Accumulator) Add(name string, value interface{}, tags map[string]string) { a.Points = append(a.Points, &Point{name, value, tags}) } func (a *Accumulator) CheckValue(name string, val interface{}) bool { for _, p := range a.Points { if p.Name == name { return p.Value == val } } return false }