108 lines
3.3 KiB
TypeScript
108 lines
3.3 KiB
TypeScript
import { screen } from '@testing-library/react';
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import { addMonths, differenceInMonths } from 'date-fns';
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import { DayPickerProps } from 'DayPicker';
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import { customRender } from 'test/render';
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import { user } from 'test/user';
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import { freezeBeforeAll } from 'test/utils';
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import { MonthsDropdown, MonthsDropdownProps } from './MonthsDropdown';
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const today = new Date(2020, 12, 22);
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freezeBeforeAll(today);
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let root: HTMLDivElement;
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let options: HTMLCollectionOf<HTMLOptionElement> | undefined;
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let select: HTMLSelectElement | null;
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function setup(props: MonthsDropdownProps, dayPickerProps?: DayPickerProps) {
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const view = customRender(<MonthsDropdown {...props} />, dayPickerProps);
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root = view.container.firstChild as HTMLDivElement;
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select = screen.queryByRole('combobox', { name: 'Month:' });
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options = select?.getElementsByTagName('option');
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}
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const props: MonthsDropdownProps = {
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displayMonth: today,
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onChange: jest.fn()
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};
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describe('when fromDate and toDate are passed in', () => {
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beforeEach(() => {
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setup(props, { fromDate: new Date(), toDate: addMonths(new Date(), 1) });
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});
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test('should render the dropdown element', () => {
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expect(root).toMatchSnapshot();
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expect(select).toHaveAttribute('name', 'months');
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});
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});
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describe('when "fromDate" is not set', () => {
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beforeEach(() => {
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setup(props, { fromDate: undefined });
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});
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test('should return nothing', () => {
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expect(root).toBeNull();
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});
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});
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describe('when "toDate" is not set', () => {
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beforeEach(() => {
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setup(props, { toDate: undefined });
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});
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test('should return nothing', () => {
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expect(root).toBeNull();
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});
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});
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describe('when "fromDate" and "toDate" are in the same year', () => {
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const fromDate = new Date(2012, 0, 22);
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const toDate = new Date(2012, 10, 22);
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beforeEach(() => {
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setup(props, { fromDate, toDate });
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});
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test('should display the months included between the two dates', () => {
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expect(options).toHaveLength(differenceInMonths(toDate, fromDate) + 1);
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});
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test('the first month should be the fromDate month', () => {
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expect(options?.[0]).toHaveValue(String(fromDate.getMonth()));
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});
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test('the last month should be the toMonth month', () => {
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expect(options?.[options.length - 1]).toHaveValue(
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String(toDate.getMonth())
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);
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});
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});
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describe('when "fromDate" and "toDate" are not in the same year', () => {
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const fromDate = new Date(2012, 0, 22);
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const toDate = new Date(2015, 10, 22);
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const displayMonth = new Date(2015, 7, 0);
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beforeEach(() => {
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setup({ ...props, displayMonth }, { fromDate, toDate });
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});
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test('should display the 12 months', () => {
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expect(options).toHaveLength(12);
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});
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test('the first month should be January', () => {
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expect(options?.[0]).toHaveValue('0');
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});
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test('the last month should be December', () => {
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expect(options?.[options.length - 1]).toHaveValue('11');
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});
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test('should select the displayed month', () => {
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expect(select).toHaveValue(`${displayMonth.getMonth()}`);
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});
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describe('when the dropdown changes', () => {
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beforeEach(async () => {
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if (select) await user.selectOptions(select, 'February');
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});
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test('should fire the "onChange" event handler', () => {
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const expectedMonth = new Date(2015, 1, 1);
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expect(props.onChange).toHaveBeenCalledWith(expectedMonth);
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});
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});
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});
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