import { render, screen } from "@testing-library/react";
import { ElapsedTimer } from "./ElapsedTimer";

test("renders nothing without a start time", () => {
  const { container } = render(<ElapsedTimer startedAt={null} />);
  expect(container).toBeEmptyDOMElement();
});

test("frozen elapsed when stoppedAt is set (2m 5s)", () => {
  render(
    <ElapsedTimer
      startedAt="2026-07-03T10:00:00.000Z"
      stoppedAt="2026-07-03T10:02:05.000Z"
    />,
  );
  expect(screen.getByText("2m 5s")).toBeInTheDocument();
});