langs/i18n: Fix i18n .Count regression

Fixes #7787

langs/i18n/i18n.go

@@ -74,19 +74,24 @@ func (t Translator) initFuncs(bndl *i18n.Bundle) {
 
 		t.translateFuncs[currentLangKey] = func(translationID string, templateData interface{}) string {
 
+			var pluralCount interface{}
+
 			if templateData != nil {
 				tp := reflect.TypeOf(templateData)
 				if hreflect.IsNumber(tp.Kind()) {
+					pluralCount = templateData
 					// This was how go-i18n worked in v1.
 					templateData = map[string]interface{}{
 						"Count": templateData,
 					}
+
 				}
 			}
 
 			translated, translatedLang, err := localizer.LocalizeWithTag(&i18n.LocalizeConfig{
 				MessageID:    translationID,
 				TemplateData: templateData,
+				PluralCount:  pluralCount,
 			})
 
 			if err == nil && currentLang == translatedLang {

langs/i18n/i18n_test.go

@@ -14,6 +14,7 @@
 package i18n
 
 import (
+	"fmt"
 	"path/filepath"
 	"testing"
 
@@ -125,6 +126,35 @@ var i18nTests = []i18nTest{
 		expected:     "¡Hola, 50 gente!",
 		expectedFlag: "¡Hola, 50 gente!",
 	},
+	// https://github.com/gohugoio/hugo/issues/7787
+	{
+		name: "readingTime-one",
+		data: map[string][]byte{
+			"en.toml": []byte(`[readingTime]
+one = "One minute to read"
+other = "{{ .Count }} minutes to read"
+`),
+		},
+		args:         1,
+		lang:         "en",
+		id:           "readingTime",
+		expected:     "One minute to read",
+		expectedFlag: "One minute to read",
+	},
+	{
+		name: "readingTime-many",
+		data: map[string][]byte{
+			"en.toml": []byte(`[readingTime]
+one = "One minute to read"
+other = "{{ .Count }} minutes to read"
+`),
+		},
+		args:         21,
+		lang:         "en",
+		id:           "readingTime",
+		expected:     "21 minutes to read",
+		expectedFlag: "21 minutes to read",
+	},
 	// Same id and translation in current language
 	// https://github.com/gohugoio/hugo/issues/2607
 	{
@@ -242,13 +272,15 @@ func TestI18nTranslate(t *testing.T) {
 		v.Set("enableMissingTranslationPlaceholders", enablePlaceholders)
 
 		for _, test := range i18nTests {
-			if enablePlaceholders {
-				expected = test.expectedFlag
-			} else {
-				expected = test.expected
-			}
-			actual = doTestI18nTranslate(t, test, v)
-			c.Assert(actual, qt.Equals, expected)
+			c.Run(fmt.Sprintf("%s-%t", test.name, enablePlaceholders), func(c *qt.C) {
+				if enablePlaceholders {
+					expected = test.expectedFlag
+				} else {
+					expected = test.expected
+				}
+				actual = doTestI18nTranslate(t, test, v)
+				c.Assert(actual, qt.Equals, expected)
+			})
 		}
 	}
 }