testcommon.LogColumns has a configurable width

testcommon/common.go

@@ -3,16 +3,17 @@ package testcommon
 
 import "testing"
 import "strings"
+import "strconv"
 
 // LogColumns logs columns of text side by side, each column 80 characters wide.
-func LogColumns (test *testing.T, columns ...any) {
-	LogColumnsStyle(test, "0m", columns...)
+func LogColumns (test *testing.T, width int, columns ...any) {
+	LogColumnsStyle(test, width, "0m", columns...)
 }
 
 // LogColumnsStyle is like LogColumns, but accepts an ANSI escape code as an
 // argument (without the \033[). For example, passing 31m causes the text to be
 // red.
-func LogColumnsStyle (test *testing.T, style string, columns ...any) {
+func LogColumnsStyle (test *testing.T, width int, style string, columns ...any) {
 	formatString := ""
 	for index := range columns {
 		if index > 0 { formatString += " | " }
@@ -20,7 +21,7 @@ func LogColumnsStyle (test *testing.T, style string, columns ...any) {
 		if index == len(columns) - 1 {
 			formatString += "%v"
 		} else {
-			formatString += "%-80v"
+			formatString += "%-" + strconv.Itoa(width) + "v"
 		}
 	}
 	test.Logf("\033[" + style + formatString + "\033[0m", columns...)
@@ -37,7 +38,8 @@ func Compare (test *testing.T, correct, got string) {
 	length       := len(gotLines)
 	if len(correctLines) > len(gotLines) { length = len(correctLines) }
 
-	LogColumns(test, "CORRECT:", "GOT:")
+	width := 80
+	LogColumns(test, width, "CORRECT:", "GOT:")
 	test.Log()
 	for index := 0; index < length; index ++ {
 		left  := ""
@@ -46,9 +48,9 @@ func Compare (test *testing.T, correct, got string) {
 		if index < len(gotLines)     { right = gotLines[index]     }
 
 		if left != right {
-			LogColumnsStyle(test, "31m", left, right)
+			LogColumnsStyle(test, width, "31m", left, right)
 		} else {
-			LogColumns(test, left, right)
+			LogColumns(test, width, left, right)
 		}
 		
 	}