package ui_test

import (
	"strings"
	"testing"
)

// TestValueFormattersEscapeControlCharacters checks that a path carrying an
// ESC and a newline — the shape a symlink target read back from the
// snapshot database could take — is escaped before it reaches the output.
// Colour is off here, so the only way a control byte could appear is from
// the value itself.
func TestValueFormattersEscapeControlCharacters(t *testing.T) {
	t.Parallel()

	w, buf := newTestWriter(false)
	w.Infof("restoring %s", w.Path("a\x1b[31mZAP\nb"))

	out := buf.String()

	if strings.ContainsRune(out, '\x1b') {
		t.Fatalf("raw ESC from a value survived in output: %q", out)
	}

	if strings.Count(out, "\n") != 1 {
		t.Fatalf("a newline in a value must be escaped, not emitted raw: %q", out)
	}

	if !strings.Contains(out, `\x1b`) {
		t.Fatalf("expected the escaped form of ESC in output: %q", out)
	}
}