1 package metrics
2
3 import (
4 "bytes"
5 "encoding/json"
6 "testing"
7 )
8
9 func 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
20 func 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
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