1package metrics
2
3import (
4	"bytes"
5	"encoding/json"
6	"testing"
7)
8
9func TestRegistryMarshallJSON(t *testing.T) {
10	b := &bytes.Buffer{}
11	enc := json.NewEncoder(b)
12	r := NewRegistry()
13	r.Register("counter", NewCounter())
14	enc.Encode(r)
15	if s := b.String(); "{\"counter\":{\"count\":0}}\n" != s {
16		t.Fatalf(s)
17	}
18}
19
20func TestRegistryWriteJSONOnce(t *testing.T) {
21	r := NewRegistry()
22	r.Register("counter", NewCounter())
23	b := &bytes.Buffer{}
24	WriteJSONOnce(r, b)
25	if s := b.String(); s != "{\"counter\":{\"count\":0}}\n" {
26		t.Fail()
27	}
28}
29