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import { describe, expect, it } from '@jest/globals';
import { render, screen as rtlScreen } from '@testing-library/react';
import {
Pagination,
type RenderPaginationItemAriaLabel,
type RenderPaginationLink,
} from './pagination';
const pagePrefix = '#page-';
const backwardLabel = 'omnis assumenda ex';
const forwardLabel = 'voluptatum aut molestiae';
const currentPageLabelPrefix = 'est nostrum a';
const pageLabelPrefix = 'reprehenderit qui unde';
const renderLink: RenderPaginationLink = (num: number) => `${pagePrefix}${num}`;
const renderItemAriaLabel: RenderPaginationItemAriaLabel = ({
kind,
pageNumber,
isCurrentPage,
}) => {
switch (kind) {
case 'backward':
return backwardLabel;
case 'forward':
return forwardLabel;
case 'number':
default:
return isCurrentPage
? `${currentPageLabelPrefix}${pageNumber}`
: `${pageLabelPrefix}${pageNumber}`;
}
};
describe('Pagination', () => {
it('renders a list of items in a nav element', () => {
const ariaLabel = 'expedita repellat rem';
const current = 1;
const total = 1;
render(
<Pagination
aria-label={ariaLabel}
current={current}
renderItemAriaLabel={renderItemAriaLabel}
renderLink={renderLink}
total={total}
/>
);
expect(
rtlScreen.getByRole('navigation', { name: ariaLabel })
).toBeInTheDocument();
expect(rtlScreen.getAllByRole('listitem')).toHaveLength(total);
});
it('can render a forward link when there is more than one page', () => {
const ariaLabel = 'expedita repellat rem';
const current = 1;
const total = 3;
render(
<Pagination
aria-label={ariaLabel}
current={current}
renderItemAriaLabel={renderItemAriaLabel}
renderLink={renderLink}
total={total}
/>
);
expect(
rtlScreen.getByRole('link', { name: forwardLabel })
).toBeInTheDocument();
// the pages links + the forward link
expect(rtlScreen.getAllByRole('listitem')).toHaveLength(total + 1);
});
it('can render a backward link when the last page is selected', () => {
const ariaLabel = 'expedita repellat rem';
const total = 3;
render(
<Pagination
aria-label={ariaLabel}
current={total}
renderItemAriaLabel={renderItemAriaLabel}
renderLink={renderLink}
total={total}
/>
);
expect(
rtlScreen.getByRole('link', { name: backwardLabel })
).toBeInTheDocument();
// the pages links + the backward link
expect(rtlScreen.getAllByRole('listitem')).toHaveLength(total + 1);
});
it('can skip next pages when the total is high and first page is selected', () => {
const ariaLabel = 'expedita repellat rem';
const current = 1;
const total = 50;
/*
* First page & the two next pages + 1 ellipsis + last page + forward link
*/
const expectedItemsCount = 6;
render(
<Pagination
aria-label={ariaLabel}
current={current}
renderItemAriaLabel={renderItemAriaLabel}
renderLink={renderLink}
total={total}
/>
);
expect(rtlScreen.getAllByRole('listitem')).toHaveLength(expectedItemsCount);
// The current page and the ellipsis should not be linked.
expect(rtlScreen.getAllByRole('link')).toHaveLength(expectedItemsCount - 2);
});
it('can skip previous pages when the total is high and last page is selected', () => {
const ariaLabel = 'expedita repellat rem';
const current = 50;
const total = 50;
/*
* Last page & the two previous pages + 1 ellipsis + first page + backward
* link
*/
const expectedItemsCount = 6;
render(
<Pagination
aria-label={ariaLabel}
current={current}
renderItemAriaLabel={renderItemAriaLabel}
renderLink={renderLink}
total={total}
/>
);
expect(rtlScreen.getAllByRole('listitem')).toHaveLength(expectedItemsCount);
// The current page and the ellipsis should not be linked.
expect(rtlScreen.getAllByRole('link')).toHaveLength(expectedItemsCount - 2);
});
it('can render a custom number of siblings', () => {
const ariaLabel = 'expedita repellat rem';
const siblings = 3;
const current = 10;
const total = 20;
/*
* Current page + 3 siblings on each side + first page + last page + 2
* ellipsis + backward and forward links
*/
const expectedItemsCount = 13;
render(
<Pagination
aria-label={ariaLabel}
current={current}
renderItemAriaLabel={renderItemAriaLabel}
renderLink={renderLink}
siblings={siblings}
total={total}
/>
);
expect(rtlScreen.getAllByRole('listitem')).toHaveLength(expectedItemsCount);
/* eslint-disable-next-line @typescript-eslint/no-magic-numbers -- The
current page and the two ellipsis should not be linked. */
expect(rtlScreen.getAllByRole('link')).toHaveLength(expectedItemsCount - 3);
});
});
|
