You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: hub_test.go
    path of file: ./repos/inbucket/pkg/msghub
    
    the code of the file until where you have to start completion: package msghub

import (
	"context"
	"errors"
	"fmt"
	"strconv"
	"testing"
	"time"

	"github.com/inbucket/inbucket/v3/pkg/extension"
	"github.com/inbucket/inbucket/v3/pkg/extension/event"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

// testListener implements the Listener in
    
func TestHubOneListener(t *testing.T) {
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()
	hub := New(5, extension.NewHost())
	go hub.Start(ctx)
	m := event.MessageMetadata{}
	l := newTestListener(1)

	hub.AddListener(l)
	hub.Dispatch(m)

	// Wait for messages
	select {
	case <-l.done:
	case <-time.After(time.Second):
		t.Error("Timeout:", l)
	}
}