Function validateRender

src/internal/validation.go:128–166

(out string, height int, width int, border bool)

}

func validateRender(out string, height int, width int, border bool) error {
	strippedOut := ansi.Strip(out)

	// Empty content is not handled correctly
	// strings.Split("", "\n") will return [""], not [].
	// Hence we need this separate handling
	if height == 0 {
		// zero lines
		if strippedOut != "" {
			return fmt.Errorf("render height mismatch: expected empty string for 0 height, got '%v'", strippedOut)
		}
		return nil
	}

	lines := strings.Split(strippedOut, "\n")

	if len(lines) != height {
		return fmt.Errorf("render height mismatch: expected %v lines, got %v", height, len(lines))
	}

	for i, line := range lines {
		lineWidth := ansi.StringWidth(line)
		if lineWidth != width {
			return fmt.Errorf(
				"render line %v, expected %v width, got %v(line - '%v')",
				i,
				width,
				lineWidth,
				lines[i],
			)
		}
	}

	if !border {
		return nil
	}

	return validateRenderBorderValidations(lines)
}

func validateRenderBorderValidations(lines []string) error {
	if len(lines) < minLinesForBorder {