dhis2/d2

import { generateFinancialJulyPeriodsUpToYear } from '../financial-july'

describe('Financial July period', () => {
    describe('generateFinancialJulyPeriodsUpToYear()', () => {
        it('should not allow years before the year zero', () => {
            expect(() =>
                generateFinancialJulyPeriodsUpToYear(-10)
            ).toThrowError()
        })

        it('should throw an error when passing a Date object', () => {
            expect(() =>
                generateFinancialJulyPeriodsUpToYear(new Date())
            ).toThrowError()
        })

        it('should generate 10 yearly periods when no numberOfYears was passed', () => {
            expect(generateFinancialJulyPeriodsUpToYear(2017)).toHaveLength(10)
        })

        it('should generate periods for 10 years with the last one being the current year', () => {
            const tenYearlyPeriods = generateFinancialJulyPeriodsUpToYear(2017)

            expect(tenYearlyPeriods).toEqual([
                {
                    endDate: '2009-06-30',
                    startDate: '2008-07-01',
                    name: 'July 2008 - June 2009',
                    id: '2008July',
                },
                {
                    endDate: '2010-06-30',
                    startDate: '2009-07-01',
                    name: 'July 2009 - June 2010',
                    id: '2009July',
                },
                {
                    endDate: '2011-06-30',
                    startDate: '2010-07-01',
                    name: 'July 2010 - June 2011',
                    id: '2010July',
                },
                {
                    endDate: '2012-06-30',
                    startDate: '2011-07-01',
                    name: 'July 2011 - June 2012',
                    id: '2011July',
                },
                {
                    endDate: '2013-06-30',
                    startDate: '2012-07-01',
                    name: 'July 2012 - June 2013',
                    id: '2012July',
                },
                {
                    endDate: '2014-06-30',
                    startDate: '2013-07-01',
                    name: 'July 2013 - June 2014',
                    id: '2013July',
                },
                {
                    endDate: '2015-06-30',
                    startDate: '2014-07-01',
                    name: 'July 2014 - June 2015',
                    id: '2014July',
                },
                {
                    endDate: '2016-06-30',
                    startDate: '2015-07-01',
                    name: 'July 2015 - June 2016',
                    id: '2015July',
                },
                {
                    endDate: '2017-06-30',
                    startDate: '2016-07-01',
                    name: 'July 2016 - June 2017',
                    id: '2016July',
                },
                {
                    endDate: '2018-06-30',
                    startDate: '2017-07-01',
                    name: 'July 2017 - June 2018',
                    id: '2017July',
                },
            ])
        })

        it('should respect the number of years parameter and generate the correct number of years', () => {
            const fiveYearlyPeriods = generateFinancialJulyPeriodsUpToYear(
                2017,
                5
            )

            expect(fiveYearlyPeriods).toEqual([
                {
                    endDate: '2014-06-30',
                    startDate: '2013-07-01',
                    name: 'July 2013 - June 2014',
                    id: '2013July',
                },
                {
                    endDate: '2015-06-30',
                    startDate: '2014-07-01',
                    name: 'July 2014 - June 2015',
                    id: '2014July',
                },
                {
                    endDate: '2016-06-30',
                    startDate: '2015-07-01',
                    name: 'July 2015 - June 2016',
                    id: '2015July',
                },
                {
                    endDate: '2017-06-30',
                    startDate: '2016-07-01',
                    name: 'July 2016 - June 2017',
                    id: '2016July',
                },
                {
                    endDate: '2018-06-30',
                    startDate: '2017-07-01',
                    name: 'July 2017 - June 2018',
                    id: '2017July',
                },
            ])
        })

        it('should throw an error when the numberOfYears is not a positive integer', () => {
            expect(() =>
                generateFinancialJulyPeriodsUpToYear(2017, 'a')
            ).toThrowError()
            expect(() =>
                generateFinancialJulyPeriodsUpToYear(2017, 1.2)
            ).toThrowError()
            expect(() =>
                generateFinancialJulyPeriodsUpToYear(2017, true)
            ).toThrowError()
            expect(() =>
                generateFinancialJulyPeriodsUpToYear(2017, -1)
            ).toThrowError()
            expect(() =>
                generateFinancialJulyPeriodsUpToYear(2017, 0)
            ).toThrowError()
            expect(() =>
                generateFinancialJulyPeriodsUpToYear(2017, Infinity)
            ).toThrowError()
        })

        it('should generate the yearly periods for 2021 and 2022', () => {
            const fiveYearlyPeriods = generateFinancialJulyPeriodsUpToYear(
                2022,
                2
            )

            expect(fiveYearlyPeriods).toEqual([
                {
                    endDate: '2022-06-30',
                    startDate: '2021-07-01',
                    name: 'July 2021 - June 2022',
                    id: '2021July',
                },
                {
                    endDate: '2023-06-30',
                    startDate: '2022-07-01',
                    name: 'July 2022 - June 2023',
                    id: '2022July',
                },
            ])
        })

        it('should generate use the current year when no year has been given', () => {
            expect(generateFinancialJulyPeriodsUpToYear()).toEqual(
                generateFinancialJulyPeriodsUpToYear(new Date().getFullYear())
            )
        })
    })
})