go get github.com/emicklei/forest

package main

import (
    "net/http"
    "testing"

    . "github.com/emicklei/forest"
)

var github = NewClient("https://api.github.com", new(http.Client))

func TestForestProjectExists(t *testing.T) {
    cfg := NewConfig("/repos/emicklei/{repo}", "forest").Header("Accept", "application/json")
    r := github.GET(t, cfg)
    ExpectStatus(t, r, 200)
}

	query := forest.NewGraphQLRequest(list_matrices_query, "ListMatrices")
	query, err = query.WithVariablesFromString(`
{
	"repositoryID":"99426e24-..........-6bf9770f1fd5",
	"page":{
		"first":20
	},	
}`)
	// ... handle error
	cfg := forest.NewRequestConfig(...)
	cfg.Content(query, "application/json")
	r := SkillsAPI.POST(t, cfg)
	ExpectStatus(t, r, 200)

func ExpectHeader(t T, r *http.Response, name, value string)
func ExpectJSONArray(t T, r *http.Response, callback func(array []interface{}))
func ExpectJSONDocument(t T, r *http.Response, doc interface{})
func ExpectJSONHash(t T, r *http.Response, callback func(hash map[string]interface{}))
func ExpectStatus(t T, r *http.Response, status int) bool
func ExpectString(t T, r *http.Response, callback func(content string))
func ExpectXMLDocument(t T, r *http.Response, doc interface{})
func JSONArrayPath(t T, r *http.Response, dottedPath string) interface{}
func JSONPath(t T, r *http.Response, dottedPath string) interface{}
func ProcessTemplate(t T, templateContent string, value interface{}) string
func Scolorf(syntaxCode string, format string, args ...interface{}) string
func SkipUnless(s skippeable, labels ...string)
func XMLPath(t T, r *http.Response, xpath string) interface{}
func Dump(t T, resp *http.Response)