package metrics

import "testing"

func TestRegistry(t *testing.T) {
	r := NewRegistry()
	r.Register("foo", NewCounter())
	i := 0
	r.Each(func(name string, iface interface{}) {
		i++
		if "foo" != name {
			t.Fatal(name)
		}
		if _, ok := iface.(Counter); !ok {
			t.Fatal(iface)
		}
	})
	if 1 != i {
		t.Fatal(i)
	}
	r.Unregister("foo")
	i = 0
	r.Each(func(string, interface{}) { i++ })
	if 0 != i {
		t.Fatal(i)
	}
}