bc518174
 王天杨
提交两个项目文件
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import { act } from '@testing-library/react';
import { addMonths, startOfMonth, subMonths } from 'date-fns';
import { DayPickerProps } from 'DayPicker';
import { renderDayPickerHook, RenderHookResult } from 'test/render';
import { freezeBeforeAll } from 'test/utils';
import { NavigationContextValue, useNavigation } from './NavigationContext';
const today = new Date(2021, 11, 8);
const todaysMonth = startOfMonth(today);
freezeBeforeAll(today);
function renderHook(props: Partial<DayPickerProps> = {}) {
return renderDayPickerHook<NavigationContextValue>(useNavigation, props);
}
let result: RenderHookResult<NavigationContextValue>;
describe('when rendered', () => {
beforeEach(() => {
result = renderHook();
});
test('the current month should be the today`s month', () => {
expect(result.current.currentMonth).toEqual(todaysMonth);
});
test('the display months should be the today`s month', () => {
expect(result.current.displayMonths).toEqual([todaysMonth]);
});
test('the previous month should be the month before today`s month', () => {
expect(result.current.previousMonth).toEqual(subMonths(todaysMonth, 1));
});
test('the next month should be the month after today`s month', () => {
expect(result.current.nextMonth).toEqual(addMonths(todaysMonth, 1));
});
describe('when goToMonth is called', () => {
const newMonth = addMonths(todaysMonth, 10);
beforeEach(() => {
result = renderHook();
act(() => result.current.goToMonth(newMonth));
});
test('should go to the specified month', () => {
expect(result.current.currentMonth).toEqual(newMonth);
});
test('the display months should be the today`s month', () => {
expect(result.current.displayMonths).toEqual([newMonth]);
});
test('the previous month should be the month before today`s month', () => {
expect(result.current.previousMonth).toEqual(subMonths(newMonth, 1));
});
test('the next month should be the month after today`s month', () => {
expect(result.current.nextMonth).toEqual(addMonths(newMonth, 1));
});
});
describe('when goToDate is called with a date from another month', () => {
const newDate = addMonths(today, 10);
const onMonthChange = jest.fn();
beforeEach(() => {
result = renderHook({ onMonthChange });
act(() => result.current.goToDate(newDate));
});
test('should go to the specified month', () => {
const date = startOfMonth(newDate);
expect(result.current.currentMonth).toEqual(date);
expect(onMonthChange).toHaveBeenCalledWith(date);
});
});
describe('when isDateDisplayed is called', () => {
describe('with a date in the calendar', () => {
test('should return true', () => {
expect(result.current.isDateDisplayed(today)).toBe(true);
});
});
describe('with a date not in the calendar', () => {
test('should return false', () => {
expect(result.current.isDateDisplayed(addMonths(today, 1))).toBe(false);
});
});
});
});
const numberOfMonths = 2;
describe('when the number of months is ${numberOfMonths}', () => {
beforeEach(() => {
result = renderHook({ numberOfMonths: 2 });
});
test('the current month should be the today`s month', () => {
expect(result.current.currentMonth).toEqual(todaysMonth);
});
test('the display months should be the today`s and next month', () => {
expect(result.current.displayMonths).toEqual([
todaysMonth,
addMonths(todaysMonth, 1)
]);
});
test('the previous month should be the month before today`s month', () => {
expect(result.current.previousMonth).toEqual(subMonths(todaysMonth, 1));
});
test('the next month should be the month after today`s month', () => {
expect(result.current.nextMonth).toEqual(addMonths(todaysMonth, 1));
});
});
describe(`when the number of months is ${numberOfMonths} and the navigation is paged`, () => {
beforeEach(() => {
result = renderHook({ numberOfMonths, pagedNavigation: true });
});
test('the current month should be the today`s month', () => {
expect(result.current.currentMonth).toEqual(todaysMonth);
});
test('the display months should be the today`s and next month', () => {
expect(result.current.displayMonths).toEqual([
todaysMonth,
addMonths(todaysMonth, 1)
]);
});
test(`the previous month should be the ${numberOfMonths} months before today's month`, () => {
expect(result.current.previousMonth).toEqual(
subMonths(todaysMonth, numberOfMonths)
);
});
test(`the next month should be ${numberOfMonths} months after today's month`, () => {
expect(result.current.nextMonth).toEqual(
addMonths(todaysMonth, numberOfMonths)
);
});
});
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