circolog/hub_test.go

package circolog

import (
	"testing"

	"gopkg.in/mcuadros/go-syslog.v2/format"
)

func msg(s string) format.LogParts {
	return format.LogParts{"text": s}
}

func hubCount(h Hub) int {
	return len(hubToArray(h))
}

var DefaultClient ClientOptions = ClientOptions{Nofollow: true, BacklogLength: -1}

func hubToArrayOpt(h Hub, opt ClientOptions) []string {
	r := make([]string, 0)
	cl := Client{Options: opt}
	cl.Messages = make(chan format.LogParts)
	h.Register <- cl
	for m := range cl.Messages {
		r = append(r, m["text"].(string))
	}
	return r
}
func hubToArray(h Hub) []string {
	return hubToArrayOpt(h, DefaultClient)
}

func TestSingle(t *testing.T) {
	h := NewHub(5)
	go h.Run()
	h.LogMessages <- msg("hi")

	if hubCount(h) != 1 {
		t.Error("wrong message number")
	}
}

func TestMany(t *testing.T) {
	h := NewHub(5)
	go h.Run()
	for i := 0; i < 10; i++ {
		h.LogMessages <- msg("hi")
	}

	if hubCount(h) != 5 {
		t.Error("wrong message number")
	}
}

func TestOrder(t *testing.T) {
	h := NewHub(5)
	go h.Run()
	h.LogMessages <- msg("one")
	h.LogMessages <- msg("two")

	r := hubToArray(h)

	if r[0] != "one" {
		t.Error("wrong first message", r[0])
	}
	if r[1] != "two" {
		t.Error("wrong last message", r[1])
	}
}

func TestLimit(t *testing.T) {
	h := NewHub(5)
	go h.Run()
	for i := 0; i < 10; i++ {
		h.LogMessages <- msg("hi")
	}

	if hubCount(h) != 5 {
		t.Error("wrong message number")
	}

	r := hubToArrayOpt(h, ClientOptions{Nofollow: true, BacklogLength: 3})
	if len(r) != 3 {
		t.Error("non-limited!", r)
	}
}