[BC Break] Remove ra-test

[fzaninotto]

You no longer need a special package to unit test your components. The react-admin package provides all you need.

If you used TestContext from 'ra-test', use AdminContext instead:

import React from 'react';
-import { TestContext } from 'ra-test';
+import { AdminContext } from 'react-admin';
import { render, screen } from '@testing-library/react';

import MyComponent from './MyComponent';

test('<MyComponent>', async () => {
    render(
-       <TestContext>
+       <AdminContext>
            <MyComponent />
-       </TestContext>
+       </AdminContext>
    );
    const items = await screen.findAllByText(/Item #[0-9]: /)
    expect(items).toHaveLength(10)
})

[WiXSL]

UnitTesting.md

Fix occurrences of getOne: jest.fn().resolve with getOne: Promise.resolve

[WiXSL]

UnitTesting.md

Fix occurrences of

const tabs = testUtils.queryByRole('tab'); expect(tabs.length).toEqual with
const tabs = testUtils.queryAllByRole('tab'); expect(tabs).toHaveLength

[djhi]

Unfortunately, TS will still complain when using the testDataProvider because of the Record type. We have some work to do on this subject