cmd, ui: Deduplicate formatting utilities

internal/ui/format_test.go

@@ -0,0 +1,33 @@
+package ui
+
+import "testing"
+
+func TestFormatBytes(t *testing.T) {
+	for _, c := range []struct {
+		size uint64
+		want string
+	}{
+		{0, "0 B"},
+		{1025, "1.001 KiB"},
+		{1<<30 + 7, "1.000 GiB"},
+	} {
+		if got := FormatBytes(c.size); got != c.want {
+			t.Errorf("want %q, got %q", c.want, got)
+		}
+	}
+}
+
+func TestFormatPercent(t *testing.T) {
+	for _, c := range []struct {
+		num, denom uint64
+		want       string
+	}{
+		{0, 5, "0.00%"},
+		{3, 7, "42.86%"},
+		{99, 99, "100.00%"},
+	} {
+		if got := FormatPercent(c.num, c.denom); got != c.want {
+			t.Errorf("want %q, got %q", c.want, got)
+		}
+	}
+}