Resolve "Amount of characters after soft limit is wrong"

cmd/validate.go

@@ -33,7 +33,7 @@ func (h *Handler) validate() int {
 
 	message := fmt.Sprintf("Your subject exceeds the soft limit of 50 chars by %d chars.", numOfExceedingChars)
 	h.notify(message, "yellow")
-	h.notify(cm.Subject[:softLimit] + color.InYellow(cm.Subject[softLimit:]))
+	h.notify(cm.Subject[:softLimit].String() + color.InYellow(cm.Subject[softLimit:].String()))
 
 	return 0
 }

cmd/validate_test.go

@@ -28,7 +28,7 @@ func TestValidate(t *testing.T) {
 	t.Run("returns 0 when soft limit exceeds and logs a warning", func(t *testing.T) {
 		buffer.Reset()
 		testFile := t.TempDir() + "/text.txt"
-		err := os.WriteFile(testFile, []byte("i am two characters more thaaaaaaaaaaaaaaaaaaaaan 50"), 0666)
+		err := os.WriteFile(testFile, []byte("i am two characters more thäaaaaaaaaaaaaaaaaaaaan 50"), 0666)
 		assert.Nil(t, err)
 		handler := NewHandler(model.Config{CommitMsgFile: testFile})
 		handler.Writer = buffer
@@ -37,7 +37,7 @@ func TestValidate(t *testing.T) {
 
 		assert.Equal(t, status, 0)
 		assert.Contains(t, buffer.String(), color.Yellow+"Your subject exceeds the soft limit of 50 chars by 2 chars.")
-		assert.Contains(t, buffer.String(), "i am two characters more thaaaaaaaaaaaaaaaaaaaaan "+color.Yellow+"50")
+		assert.Contains(t, buffer.String(), "i am two characters more thäaaaaaaaaaaaaaaaaaaaan "+color.Yellow+"50")
 	})
 
 	t.Run("returns 1 when commit message too long", func(t *testing.T) {

internal/model/commit_message.go

@@ -1,12 +1,13 @@
 package model
 
 import (
-	"regexp"
 	"strings"
 )
 
+type Subject []rune
+
 type CommitMessage struct {
-	Subject     string
+	Subject     Subject
 	Body        []string
 	InvalidBody bool
 }
@@ -22,27 +23,24 @@ func CreateCommitMessageFrom(messageLines []string) *CommitMessage {
 func (cm *CommitMessage) ValidateSubject() int {
 	currentSubjectLength := len(cm.Subject)
 
-	if strings.HasPrefix(cm.Subject, "Merge ") {
+	if strings.HasPrefix(cm.Subject.String(), "Merge ") {
 		return 0
 	}
 
-	if currentSubjectLength > 72 {
-		return currentSubjectLength - 50
-	}
-
 	if currentSubjectLength > 50 {
-		re := regexp.MustCompile(`^#\d+ -\s*(.*)$`)
-		trimmedSubject := re.ReplaceAllString(cm.Subject, `$1`)
-
-		return len(trimmedSubject) - 50
+		return currentSubjectLength - 50
 	}
 
 	return 0
 }
 
+func (s Subject) String() string {
+	return string(s)
+}
+
 func (cm *CommitMessage) addSubject(messageLines []string) {
 	if len(messageLines) >= 1 {
-		cm.Subject = messageLines[0]
+		cm.Subject = []rune(messageLines[0])
 	}
 }
 

internal/model/commit_message_test.go

@@ -19,7 +19,7 @@ func TestNewCommitMessage(t *testing.T) {
 	t.Run("create new commit message object from File", func(t *testing.T) {
 		cm := CreateCommitMessageFrom(validCommitMsgLines)
 
-		assert.Equal(t, "I am a valid Subject with less than 50 characters", cm.Subject)
+		assert.Equal(t, "I am a valid Subject with less than 50 characters", cm.Subject.String())
 		assert.Len(t, cm.Body, 3)
 		assert.False(t, cm.InvalidBody)
 	})
@@ -28,7 +28,7 @@ func TestNewCommitMessage(t *testing.T) {
 		var emptyCommitMsgLines []string
 		cm := CreateCommitMessageFrom(emptyCommitMsgLines)
 
-		assert.Equal(t, "", cm.Subject)
+		assert.Equal(t, "", cm.Subject.String())
 		assert.Len(t, cm.Body, 0)
 	})
 
@@ -41,7 +41,7 @@ func TestNewCommitMessage(t *testing.T) {
 		cm := CreateCommitMessageFrom(invalidCommitMsgLines)
 
 		t.Run("sets body correct", func(t *testing.T) {
-			assert.Equal(t, "subject line", cm.Subject)
+			assert.Equal(t, "subject line", cm.Subject.String())
 			assert.Len(t, cm.Body, 2)
 		})
 
@@ -62,10 +62,11 @@ func TestNewCommitMessage(t *testing.T) {
 		}{
 			{"more than................72....................................characters", 23},
 			{"more than................50................less than 72 characters", 16},
-			{"#1301 - more than........50..............through ID prefix", 0},
+			{"#1301 - more than........50..............through ID prefix", 8},
 			{"short subject line", 0},
 			{"Merge pull request commits are ignored because they can easily exceed 52 characters", 0},
 			{"Merge branch commits are also ignored..............................................", 0},
+			{"I am a commit containing an umlaut ü.................", 3},
 		}
 
 		for _, tc := range testcases {