v0.0.477 add langext.StrWrap

goextVersion.go

@@ -1,5 +1,5 @@
 package goext
 
-const GoextVersion = "0.0.476"
+const GoextVersion = "0.0.477"
 
-const GoextVersionTimestamp = "2024-06-28T18:37:02+0200"
+const GoextVersionTimestamp = "2024-06-29T15:36:39+0200"

langext/string.go

@@ -88,12 +88,15 @@ func StrRunePadRight(str string, pad string, padlen int) string {
 
 func Indent(str string, pad string) string {
 	eonl := strings.HasSuffix(str, "\n")
+	if eonl {
+		str = str[0 : len(str)-1]
+	}
 	r := ""
 	for _, v := range strings.Split(str, "\n") {
 		r += pad + v + "\n"
 	}
 
-	if eonl {
+	if !eonl {
 		r = r[0 : len(r)-1]
 	}
 
@@ -115,3 +118,21 @@ func StrRepeat(val string, count int) string {
 	}
 	return r
 }
+
+func StrWrap(val string, linelen int, seperator string) string {
+	res := ""
+
+	for iPos := 0; ; {
+		next := min(iPos+linelen, len(val))
+		res += val[iPos:next]
+
+		iPos = next
+		if iPos >= len(val) {
+			break
+		}
+
+		res += seperator
+	}
+
+	return res
+}

langext/string_test.go

@@ -0,0 +1,152 @@
+package langext
+
+import "testing"
+
+func TestStrLimitBehaviour(t *testing.T) {
+	val := "Hello, World!"
+	maxlen := 5
+	suffix := "..."
+	expected := "He..."
+	result := StrLimit(val, maxlen, suffix)
+	if result != expected {
+		t.Errorf("Expected %v but got %v", expected, result)
+	}
+}
+
+func TestStrSplitBehaviour1(t *testing.T) {
+	val := "Hello,World,,"
+	sep := ","
+	expected := []string{"Hello", "World"}
+	result := StrSplit(val, sep, false)
+	if len(result) != len(expected) {
+		t.Errorf("Expected %v but got %v", expected, result)
+	}
+}
+
+func TestStrSplitBehaviour2(t *testing.T) {
+	val := "Hello,World,,"
+	sep := ","
+	expected := []string{"Hello", "World", "", ""}
+	result := StrSplit(val, sep, true)
+	if len(result) != len(expected) {
+		t.Errorf("Expected %v but got %v", expected, result)
+	}
+}
+
+func TestStrPadRightBehaviour(t *testing.T) {
+	str := "Hello"
+	pad := "*"
+	padlen := 10
+	expected := "Hello*****"
+	result := StrPadRight(str, pad, padlen)
+	if result != expected {
+		t.Errorf("Expected %v but got %v", expected, result)
+	}
+}
+
+func TestStrPadLeftBehaviour(t *testing.T) {
+	str := "Hello"
+	pad := "*"
+	padlen := 10
+	expected := "*****Hello"
+	result := StrPadLeft(str, pad, padlen)
+	if result != expected {
+		t.Errorf("Expected %v but got %v", expected, result)
+	}
+}
+
+func TestStrRunePadLeftBehaviour(t *testing.T) {
+	str := "Hello"
+	pad := "*"
+	padlen := 10
+	expected := "*****Hello"
+	result := StrRunePadLeft(str, pad, padlen)
+	if result != expected {
+		t.Errorf("Expected %v but got %v", expected, result)
+	}
+}
+
+func TestStrRunePadRightBehaviour(t *testing.T) {
+	str := "Hello"
+	pad := "*"
+	padlen := 10
+	expected := "Hello*****"
+	result := StrRunePadRight(str, pad, padlen)
+	if result != expected {
+		t.Errorf("Expected %v but got %v", expected, result)
+	}
+}
+
+func TestIndentBehaviour1(t *testing.T) {
+	str := "Hello\nWorld"
+	pad := ".."
+	expected := "..Hello\n..World"
+	result := Indent(str, pad)
+	if result != expected {
+		t.Errorf("Expected %v but got %v", expected, result)
+	}
+}
+
+func TestIndentBehaviour2(t *testing.T) {
+	str := "Hello\nWorld\n"
+	pad := ".."
+	expected := "..Hello\n..World\n"
+	result := Indent(str, pad)
+	if result != expected {
+		t.Errorf("Expected %v but got %v", expected, result)
+	}
+}
+
+func TestStrRepeatBehaviour(t *testing.T) {
+	val := "Hello"
+	count := 3
+	expected := "HelloHelloHello"
+	result := StrRepeat(val, count)
+	if result != expected {
+		t.Errorf("Expected %v but got %v", expected, result)
+	}
+}
+
+func TestStrWrapBehaviour1(t *testing.T) {
+	val := "123456789"
+	linelen := 5
+	seperator := "\n"
+	expected := "12345\n6789"
+	result := StrWrap(val, linelen, seperator)
+	if result != expected {
+		t.Errorf("Expected %v but got %v", expected, result)
+	}
+}
+
+func TestStrWrapBehaviour2(t *testing.T) {
+	val := "1234567890"
+	linelen := 5
+	seperator := "\n"
+	expected := "12345\n67890"
+	result := StrWrap(val, linelen, seperator)
+	if result != expected {
+		t.Errorf("Expected %v but got %v", expected, result)
+	}
+}
+
+func TestStrWrapBehaviour3(t *testing.T) {
+	val := "****************"
+	linelen := 4
+	seperator := "\n"
+	expected := "****\n****\n****\n****"
+	result := StrWrap(val, linelen, seperator)
+	if result != expected {
+		t.Errorf("Expected %v but got %v", expected, result)
+	}
+}
+
+func TestStrWrapBehaviour4(t *testing.T) {
+	val := "*****************"
+	linelen := 4
+	seperator := "\n"
+	expected := "****\n****\n****\n****\n*"
+	result := StrWrap(val, linelen, seperator)
+	if result != expected {
+		t.Errorf("Expected %v but got %v", expected, result)
+	}
+}