slate-data-filter-plugin/src/index.test.js

onKeyDown handler which removes data that would othwise be inherited

import FilterData from './index';

const event = {
    keyCode: 13
};
const setBlocksMock = jest.fn();
const change = {
    value: {
        selection: {},
        document: {}
    },
    splitBlock() {
        return {setBlocks: setBlocksMock}
    }
};

beforeEach(() => {
    jest.resetAllMocks()
});

test('removes data where Enter key is pressed', () => {
    FilterData().onKeyDown(event, change);
    expect(setBlocksMock.mock.calls.length).toBe(1);
});

test('nothing happens for non-enter event', () => {
    const response = FilterData().onKeyDown({
        keyCode: 1
    }, change);
    expect(setBlocksMock.mock.calls.length).toBe(0);
    expect(response).toBe(undefined);
});