vega-frontend-monorepo/libs/ui-toolkit/src/components/sparkline/sparkline.spec.tsx

import { render, screen } from '@testing-library/react';

import { Sparkline } from './sparkline';

const props = {
  data: [
    1, 2, 3, 4, 5, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 6, 7, 8, 9,
    10, 11, 12,
  ],
  muted: true,
};

it('Renders an svg with a single path', () => {
  render(<Sparkline {...props} />);
  expect(screen.getByTestId('sparkline-svg')).toBeInTheDocument();
  const paths = screen.getAllByTestId('sparkline-path');
  const path = paths[0];
  expect(path).toBeInTheDocument();
  expect(path).toHaveAttribute('d', expect.any(String));
  expect(path).toHaveAttribute('stroke', expect.any(String));
  expect(path).toHaveAttribute('stroke-width', '1');
  expect(path).toHaveAttribute('fill', 'transparent');
});

it('Requires a data prop but width and height are optional', () => {
  render(<Sparkline {...props} />);
  const svg = screen.getByTestId('sparkline-svg');
  expect(svg).toHaveAttribute('width', '60');
  expect(svg).toHaveAttribute('height', '15');
});

it('Renders a red line if the last value is less than the first', () => {
  props.data[0] = 10;
  props.data[props.data.length - 1] = 5;
  render(<Sparkline {...props} />);
  const paths = screen.getAllByTestId('sparkline-path');
  const path = paths[0];
  expect(path).toHaveClass(
    '[vector-effect:non-scaling-stroke] stroke-vega-red-dark dark:stroke-vega-red'
  );
});

it('Renders a green line if the last value is greater than the first', () => {
  props.data[0] = 5;
  props.data[props.data.length - 1] = 10;
  props.muted = true;
  render(<Sparkline {...props} />);
  const paths = screen.getAllByTestId('sparkline-path');
  const path = paths[0];
  expect(path).toHaveClass(
    '[vector-effect:non-scaling-stroke] stroke-vega-green-dark dark:stroke-vega-green'
  );
});

it('Renders a white line if the first and last values are equal', () => {
  props.data[0] = 5;
  props.data[props.data.length - 1] = 5;
  render(<Sparkline {...props} />);
  const paths = screen.getAllByTestId('sparkline-path');
  const path = paths[0];
  expect(path).toHaveClass(
    '[vector-effect:non-scaling-stroke] stroke-black/40 dark:stroke-white/40'
  );
});

it('Renders a gray line if there are not 24 values', () => {
  props.data = [
    1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
    22, 23,
  ];
  render(<Sparkline {...props} />);
  const paths = screen.queryAllByTestId('sparkline-path');
  expect(paths).toHaveLength(2);
  expect(paths[0]).toHaveClass(
    '[vector-effect:non-scaling-stroke] stroke-black/40 dark:stroke-white/40'
  );
});