Merge pull request #193 from antham/add-tests

Add tests to i18n package

pkg/app/app.go

@@ -51,10 +51,7 @@ func NewApp(config config.AppConfigurer) (*App, error) {
 		return app, err
 	}
 
-	app.Tr, err = i18n.NewLocalizer(app.Log)
-	if err != nil {
-		return app, err
-	}
+	app.Tr = i18n.NewLocalizer(app.Log)
 
 	app.GitCommand, err = commands.NewGitCommand(app.Log, app.OSCommand)
 	if err != nil {

pkg/i18n/i18n.go

@@ -18,33 +18,12 @@ type Localizer struct {
 }
 
 // NewLocalizer creates a new Localizer
-func NewLocalizer(log *logrus.Logger) (*Localizer, error) {
+func NewLocalizer(log *logrus.Logger) *Localizer {
+	userLang := detectLanguage(jibber_jabber.DetectLanguage)
 
-	// detect the user's language
-	userLang, err := jibber_jabber.DetectLanguage()
-	if err != nil {
-		if err.Error() != "Could not detect Language" {
-			return nil, err
-		}
-		userLang = "C"
-	}
 	log.Info("language: " + userLang)
 
-	// create a i18n bundle that can be used to add translations and other things
-	i18nBundle := &i18n.Bundle{DefaultLanguage: language.English}
-
-	addBundles(log, i18nBundle)
-
-	// return the new localizer that can be used to translate text
-	i18nLocalizer := i18n.NewLocalizer(i18nBundle, userLang)
-
-	localizer := &Localizer{
-		i18nLocalizer: i18nLocalizer,
-		language:      userLang,
-		Log:           log,
-	}
-
-	return localizer, nil
+	return setupLocalizer(log, userLang)
 }
 
 // Localize handels the translations
@@ -82,17 +61,42 @@ func (l *Localizer) GetLanguage() string {
 
 // add translation file(s)
 func addBundles(log *logrus.Logger, i18nBundle *i18n.Bundle) {
-	err := addPolish(i18nBundle)
-	if err != nil {
-		log.Fatal(err)
-	}
-	err = addDutch(i18nBundle)
-	if err != nil {
-		log.Fatal(err)
-	}
-	err = addEnglish(i18nBundle)
-	if err != nil {
-		log.Fatal(err)
+	fs := []func(*i18n.Bundle) error{
+		addPolish,
+		addDutch,
+		addEnglish,
 	}
 
+	for _, f := range fs {
+		if err := f(i18nBundle); err != nil {
+			log.Fatal(err)
+
+		}
+	}
+}
+
+// detectLanguage extracts user language from environment
+func detectLanguage(langDetector func() (string, error)) string {
+	if userLang, err := langDetector(); err == nil {
+		return userLang
+	}
+
+	return "C"
+}
+
+// setupLocalizer creates a new localizer using given userLang
+func setupLocalizer(log *logrus.Logger, userLang string) *Localizer {
+	// create a i18n bundle that can be used to add translations and other things
+	i18nBundle := &i18n.Bundle{DefaultLanguage: language.English}
+
+	addBundles(log, i18nBundle)
+
+	// return the new localizer that can be used to translate text
+	i18nLocalizer := i18n.NewLocalizer(i18nBundle, userLang)
+
+	return &Localizer{
+		i18nLocalizer: i18nLocalizer,
+		language:      userLang,
+		Log:           log,
+	}
 }

pkg/i18n/i18n_test.go

@@ -0,0 +1,81 @@
+package i18n
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/nicksnyder/go-i18n/v2/i18n"
+
+	"github.com/Sirupsen/logrus"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestNewLocalizer(t *testing.T) {
+	assert.NotNil(t, NewLocalizer(logrus.New()))
+}
+
+func TestDetectLanguage(t *testing.T) {
+	type scenario struct {
+		langDetector func() (string, error)
+		expected     string
+	}
+
+	scenarios := []scenario{
+		{
+			func() (string, error) {
+				return "", fmt.Errorf("An error occurred")
+			},
+			"C",
+		},
+		{
+			func() (string, error) {
+				return "en", nil
+			},
+			"en",
+		},
+	}
+
+	for _, s := range scenarios {
+		assert.EqualValues(t, s.expected, detectLanguage(s.langDetector))
+	}
+}
+
+func TestLocalizer(t *testing.T) {
+	type scenario struct {
+		userLang string
+		test     func(*Localizer)
+	}
+
+	scenarios := []scenario{
+		{
+			"C",
+			func(l *Localizer) {
+				assert.EqualValues(t, "C", l.GetLanguage())
+				assert.Equal(t, "Diff", l.Localize(&i18n.LocalizeConfig{
+					DefaultMessage: &i18n.Message{
+						ID: "DiffTitle",
+					},
+				}))
+				assert.Equal(t, "Diff", l.SLocalize("DiffTitle"))
+				assert.Equal(t, "Are you sure you want delete the branch test ?", l.TemplateLocalize("DeleteBranchMessage", Teml{"selectedBranchName": "test"}))
+			},
+		},
+		{
+			"nl",
+			func(l *Localizer) {
+				assert.EqualValues(t, "nl", l.GetLanguage())
+				assert.Equal(t, "Diff", l.Localize(&i18n.LocalizeConfig{
+					DefaultMessage: &i18n.Message{
+						ID: "DiffTitle",
+					},
+				}))
+				assert.Equal(t, "Diff", l.SLocalize("DiffTitle"))
+				assert.Equal(t, "Weet je zeker dat je test branch wil verwijderen?", l.TemplateLocalize("DeleteBranchMessage", Teml{"selectedBranchName": "test"}))
+			},
+		},
+	}
+
+	for _, s := range scenarios {
+		s.test(setupLocalizer(logrus.New(), s.userLang))
+	}
+}