koral--

func getRandomJoke(config Config) (string, error) {
  request, err := buildJokeRequest(config)
  if err != nil {
    return "", err
  }

  response, err := getJoke(request)
  if err != nil {
    return "", err
  }

koral--

func readJokeFromResponse(response *http.Response) (string, error) {
  if response.StatusCode != http.StatusOK {
    return "", fmt.Errorf("server returned an error: %s", response.Status)
  }

  content, err := ioutil.ReadAll(response.Body)
  return string(content), err
}

koral--

func getJoke(request *http.Request) (*http.Response, error) {
	client := &http.Client{}
	client.Timeout = 20 * time.Second
	return client.Do(request)
}

koral--

func buildJokeRequest(config Config) (*http.Request, error) {
	jokeURL, err := buildJokeURL(config)
	if err != nil {
		return nil, err
	}

	request, err := http.NewRequest("GET", jokeURL.String(), nil)
	if err != nil {
		return nil, err
	}

koral--

var config Config
if err := stepconf.Parse(&config); err != nil {
	log.Errorf("Could not validate config, error: %s\n", err)
	os.Exit(1)
}

koral--

// Config ...
type Config struct {
	APIBaseURL string `env:"api_base_url,required"`
	Category   string `env:"category"`
}

koral--

inputs:
  - category:
    opts:
      title: "Joke category, optional."
      summary: |
        Optional category of the joke, see [list of available categories](https://api.chucknorris.io/jokes/categories).
        If empty joke won't be restricted to any category.
      is_expand: true
      is_required: false
  - api_base_url: "https://api.chucknorris.io"

koral--

func TestDownloadFileUnreachableURL(t *testing.T) {
	dummyFile, err := os.Open("/dev/null")
	require.NoError(t, err)

	err = downloadFile("http://unreachable.invalid", dummyFile)
	require.Error(t, err)
}

koral--

- change-workdir:
    title: Switch working dir to test / _tmp dir
    description: |-
      To prevent step testing issues, like referencing relative
      files with just './some-file' in the step's code, which would
      work for testing the step from this directory directly
      but would break if the step is included in another `bitrise.yml`.
    run_if: "true"
    inputs:
    - path: ./_tmp

koral--

func downloadFile(downloadURL string, outFile *os.File) error {
	response, err := http.Get(downloadURL)
	if err != nil {
		return err
	}

	defer func() {
		if err := response.Body.Close(); err != nil {
			log.Warnf("Failed to close (%s) body", downloadURL)
		}