bc518174
 王天杨
提交两个项目文件
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import { addMonths, isSameMonth } from 'date-fns';
import { getInitialMonth } from './getInitialMonth';
describe('when no toDate is given', () => {
describe('when month is in context', () => {
const month = new Date(2010, 11, 12);
it('return that month', () => {
const initialMonth = getInitialMonth({ month });
expect(isSameMonth(initialMonth, month)).toBe(true);
});
});
describe('when defaultMonth is in context', () => {
const defaultMonth = new Date(2010, 11, 12);
it('return that month', () => {
const initialMonth = getInitialMonth({ defaultMonth });
expect(isSameMonth(initialMonth, defaultMonth)).toBe(true);
});
});
describe('when no month or defaultMonth are in context', () => {
const today = new Date(2010, 11, 12);
it('return the today month', () => {
const initialMonth = getInitialMonth({ today });
expect(isSameMonth(initialMonth, today)).toBe(true);
});
});
});
describe('when toDate is given', () => {
describe('when toDate is before the default initial date', () => {
const month = new Date(2010, 11, 12);
const toDate = addMonths(month, -2);
describe('when the number of month is 1', () => {
const numberOfMonths = 1;
it('return the toDate', () => {
const initialMonth = getInitialMonth({
month,
toDate,
numberOfMonths
});
expect(isSameMonth(initialMonth, toDate)).toBe(true);
});
});
describe('when the number of month is 3', () => {
const numberOfMonths = 3;
it('return the toDate plus the number of months', () => {
const initialMonth = getInitialMonth({
month,
toDate,
numberOfMonths
});
const expectedMonth = addMonths(toDate, -1 * (numberOfMonths - 1));
expect(isSameMonth(initialMonth, expectedMonth)).toBe(true);
});
});
});
});
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