text: fix broken truncate with unicode and use the ellipsis character in LeftPadMaxLine

1 files changed, 56 insertions, 0 deletions

diff --git a/util/text/left_padded_test.go b/util/text/left_padded_test.go
new file mode 100644
index 00000000..0be79e32
--- /dev/null
+++ b/util/text/left_padded_test.go
@@ -0,0 +1,56 @@
+package text
+
+import "testing"
+
+func TestLeftPadMaxLine(t *testing.T) {
+	cases := []struct {
+		input, output  string
+		maxValueLength int
+		leftPad        int
+	}{
+		{
+			"foo",
+			"foo ",
+			4,
+			0,
+		},
+		{
+			"foofoofoo",
+			"foo…",
+			4,
+			0,
+		},
+		{
+			"foo",
+			"foo       ",
+			10,
+			0,
+		},
+		{
+			"foo",
+			"  f…",
+			4,
+			2,
+		},
+		{
+			"foofoofoo",
+			"  foo…",
+			6,
+			2,
+		},
+		{
+			"foo",
+			"  foo     ",
+			10,
+			2,
+		},
+	}
+
+	for i, tc := range cases {
+		result := LeftPadMaxLine(tc.input, tc.maxValueLength, tc.leftPad)
+		if result != tc.output {
+			t.Fatalf("Case %d Input:\n\n`%s`\n\nExpected Output:\n\n`%s`\n\nActual Output:\n\n`%s`",
+				i, tc.input, tc.output, result)
+		}
+	}
+}