An attempt to recreate the race condition in godo.

race_test.go

package race_test

import (
	"context"
	"fmt"
	"log"
	"math/rand"
	"os"
	"sync"
	"testing"

	"github.com/digitalocean/godo"
	"golang.org/x/oauth2"
)

type TokenSource struct {
	AccessToken string
}

func (t *TokenSource) Token() (*oauth2.Token, error) {
	return &oauth2.Token{AccessToken: os.Getenv("DIGITALOCEAN_API_TOKEN")}, nil
}

var client = godo.NewClient(oauth2.NewClient(context.TODO(), &TokenSource{}))

func randomAPICall() error {
	funcs := [](func() error){
		func() error {
			_, _, err := client.Droplets.List(context.TODO(), &godo.ListOptions{})
			return err
		},
		func() error {
			_, _, err := client.Droplets.Get(context.TODO(), 1)
			return err
		},
		func() error {
			_, _, err := client.DropletActions.Get(context.TODO(), 1, 1)
			return err
		},
	}
	n := rand.Intn(3)
	fmt.Println(n)
	return funcs[n]()
}

func TestRace(t *testing.T) {
	var wg sync.WaitGroup
	runs := 20

	// Start 20 goroutines so fire off random requests.
	wg.Add(runs)
	for i := 0; i < runs; i++ {
		go func(w *sync.WaitGroup) {
			defer w.Done()
			if err := randomAPICall(); err != nil {
				log.Println(err)
			}
		}(&wg)
	}
	wg.Wait()
	log.Println("DONE")
}