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: messages_test.go
    path of file: ./repos/go-in-5-minutes/episode7/vendor/github.com/google/go-github/github
    
    the code of the file until where you have to start completion: // Copyright 2016 The go-github AUTHORS. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package github

import (
	"bytes"
	"encoding/json"
	"net/http"
	"reflect"
	"testing"
)

func TestValidatePayload(t *testing.T) {
	const defaultBody = `{"yo":true}` // All tests below use the default request body and signature.
	const defaultSignature = "sha1=126f2c800419c60137ce748d7672e77b65cf16d6"
	secretKey := []byte("0123456789abcdef")
	tests := []struct {
		signature   string
		eventID     string
		event       string
		wantEventID string
		wantEvent   string
		wantPayload string
	}{
		// The following tests generate expected errors:
		{},                         // Missing signature
		{signature: "yo"},          // Missing signature prefix
		{signature: "sha1=yo"},     // Signature not hex string
		{signature: "sha1=012345"}, // Invalid signature
		// The following tests expect err=nil:
		{
			signature:   defaultSignature,
			eventID:     "dead-beef",
			event:       "ping",
			wantEventID: "dead-beef",
			wantEvent:   "ping",
			wantPayload: defaultBody,
		},
		{
			signature:   defaultSignature,
			event:       "ping",
			wantEvent:   "ping",
			wantPayload: defaultBody,
		},
		{
			signature:   "sha256=b1f8020f5b4cd42042f807dd939015c4a418bc1ff7f604dd55b0a19b5d953d9b",
			event:       "ping",
			wantEvent:   "ping",
			wantPayload: defaultBody,
		},
		{
			signature:   "sha512=8456767023c1195682e182a23b3f5d19150ecea598fde8cb85918f7281b16079471b1329f92b912c4d8bd7455cb159777db8f29608b20c7c87323ba65ae62e1f",
			event:       "ping",
			wantEvent:   "ping",
			wantPayload: defaultBody,
		},
	}

	for _, test := range tests {
		buf := bytes.NewBufferString(defaultBody)
		req, err := http.NewRequest("GET", "http://localhost/event", buf)
		if err != nil {
			t.Fatalf("NewRequest: %v", err)
		}
		if test.signature != "" {
			req.Header.Set(signatureHeader, test.signature)
		}

		got, err := ValidatePayload(req, secretKey)
		if err != nil {
			if test.wantPayload != "" {
				t.Errorf("ValidatePayload(%#v): err = %v, want nil", test, err)
			}
			continue
		}
		if string(got) != test.wantPayload {
			t.Errorf("ValidatePayload = %q, want %q", got, test.wantPayload)
		}
	}
}


    
func TestParseWebHook(t *testing.T) {
	tests := []struct {
		payload     interface{}
		messageType string
	}{
		{
			payload:     &CommitCommentEvent{},
			messageType: "commit_comment",
		},
		{
			payload:     &CreateEvent{},
			messageType: "create",
		},
		{
			payload:     &DeleteEvent{},
			messageType: "delete",
		},
		{
			payload:     &DeploymentEvent{},
			messageType: "deployment",
		},

		{
			payload:     &DeploymentStatusEvent{},
			messageType: "deployment_status",
		},
		{
			payload:     &ForkEvent{},
			messageType: "fork",
		},
		{
			payload:     &GollumEvent{},
			messageType: "gollum",
		},
		{
			payload:     &IssueCommentEvent{},
			messageType: "issue_comment",
		},
		{
			payload:     &IssuesEvent{},
			messageType: "issues",
		},
		{
			payload:     &LabelEvent{},
			messageType: "label",
		},
		{
			payload:     &MemberEvent{},
			messageType: "member",
		},
		{
			payload:     &MembershipEvent{},
			messageType: "membership",
		},
		{
			payload:     &MilestoneEvent{},
			messageType: "milestone",
		},
		{
			payload:     &OrganizationEvent{},
			messageType: "organization",
		},
		{
			payload:     &PageBuildEvent{},
			messageType: "page_build",
		},
		{
			payload:     &PingEvent{},
			messageType: "ping",
		},
		{
			payload:     &ProjectEvent{},
			messageType: "project",
		},
		{
			payload:     &ProjectCardEvent{},
			messageType: "project_card",
		},
		{
			payload:     &ProjectColumnEvent{},
			messageType: "project_column",
		},
		{
			payload:     &PublicEvent{},
			messageType: "public",
		},
		{
			payload:     &PullRequestEvent{},
			messageType: "pull_request",
		},
		{
			payload:     &PullRequestReviewEvent{},
			messageType: "pull_request_review",
		},
		{
			payload:     &PullRequestReviewCommentEvent{},
			messageType: "pull_request_review_comment",
		},
		{
			payload:     &PushEvent{},
			messageType: "push",
		},
		{
			payload:     &ReleaseEvent{},
			messageType: "release",
		},
		{
			payload:     &RepositoryEvent{},
			messageType: "repository",
		},
		{
			payload:     &StatusEvent{},
			messageType: "status",
		},
		{
			payload:     &TeamAddEvent{},
			messageType: "team_add",
		},
		{
			payload:     &WatchEvent{},
			messageType: "watch",
		},
	}

	for _, test := range tests {
		p, err := json.Marshal(test.payload)
		if err != nil {
			t.Fatalf("Marshal(%#v): %v", test.payload, err)
		}
		got, err := ParseWebHook(test.messageType, p)
		if err != nil {
			t.Fatalf("ParseWebHook: %v", err)
		}
		if want := test.payload; !reflect.DeepEqual(got, want) {
			t.Errorf("ParseWebHook(%#v, %#v) = %#v, want %#v", test.messageType, p, got, want)
		}
	}
}