text: import I18n from 'i18n-js';
  import Helper from './i18n.js';
  
  describe('I18n Helper', () => {
    beforeEach(() => {
      I18n.translations = {
        en: {
          number: {
            format: {
              delimiter: ',',
              separator: '.'
            },
            currency: {
              format: {
                unit: '£',
                format: '%u%n'
              }
            }
          }
        },
        fr: {
          number: {
            format: {
              delimiter: '.',
              separator: ','
            },
            currency: {
              format: {
                unit: '€',
                format: '%n %u'
              }
            }
          }
        }
      };
    });
  
    describe('formatDecimal', () => {
      describe('when a value is provided', () => {
        describe('and precision is not provided, ', () => {
          it('returns the formated value using defalut precision', () => {
            expect(Helper.formatDecimal('1234567')).toEqual('1,234,567.00');
            expect(Helper.formatDecimal('1000')).toEqual('1,000.00');
            expect(Helper.formatDecimal('100')).toEqual('100.00');
            expect(Helper.formatDecimal('1234567.894')).toEqual('1,234,567.89');
          });
        });
  
        describe('and a precision is provided, ', () => {
          it('returns the formated value using provided precision', () => {
            expect(Helper.formatDecimal('1234567', 3)).toEqual('1,234,567.000');
            expect(Helper.formatDecimal('1000', 0)).toEqual('1,000');
            expect(Helper.formatDecimal('100', 1)).toEqual('100.0');
            expect(Helper.formatDecimal('1234567.894', 3)).toEqual('1,234,567.894');
          });
        });
      });
  
      describe('when a value is not provided', () => {
        it('returns the 0.00 value', () => {
          expect(Helper.formatDecimal()).toEqual('0.00');
        });
      });
  
      describe('when locale is not set', () => {
        beforeEach(() => {
          I18n.locale = null;
        });
  
        afterEach(() => {
          I18n.locale = 'en';
        });
  
        it('defaults to en', () => {
          expect(Helper.formatDecimal('1234567', 3)).toEqual('1,234,567.000');
        });
      });
    });
  
    describe('unformatDecimal', () => {
      describe('when a value is provided', () => {
        it('returns the un-formated value', () => {
          expect(Helper.unformatDecimal('1,234,567.00')).toEqual('1234567.00');
          expect(Helper.unformatDecimal('1,234,567.894')).toEqual('1234567.894');
          expect(Helper.unformatDecimal('1,000')).toEqual('1000');
          expect(Helper.unformatDecimal('100.00')).toEqual('100.00');
        });
      });
      describe('when a value is not provided', () => {
        it('returns the empty string', () => {
          expect(Helper.unformatDecimal('')).toEqual('');
        });
  
        it('returns the empty string', () => {
          expect(Helper.unformatDecimal()).toEqual('');
        });
      });
    });
  
    describe('abbreviateCurrency', () => {
      it('creates the correct abbreviation', () => {
        expect(Helper.abbreviateCurrency('-345')).toEqual('£-345.00');
        expect(Helper.abbreviateCurrency('345')).toEqual('£345.00');
        expect(Helper.abbreviateCurrency('678', { locale: 'fr', unit: '€' })).toEqual('678.00 €');
        expect(Helper.abbreviateCurrency('123456', { locale: 'en', unit: '£' })).toEqual('£123.5k');
        expect(Helper.abbreviateCurrency('567890', { locale: 'fr', unit: '€' })).toEqual('567.9k €');
        expect(Helper.abbreviateCurrency('987654321', { locale: 'en', unit: '£' })).toEqual('£987.7m');
        expect(Helper.abbreviateCurrency('234567890', { locale: 'fr', unit: '€' })).toEqual('234.6m €');
      });
  
      describe('when locale is different to the provided locale', () => {
        beforeEach(() => {
          I18n.locale = 'fr';
        });
  
        afterEach(() => {
          I18n.locale = 'en';
        });
  
        it('creates the correct abbreviation', () => {
          expect(Helper.abbreviateCurrency('-345')).toEqual('-345,00 €');
          expect(Helper.abbreviateCurrency('345')).toEqual('345,00 €');
          expect(Helper.abbreviateCurrency('678', { locale: 'fr', unit: '€' })).toEqual('678,00 €');
          expect(Helper.abbreviateCurrency('123456', { locale: 'en', unit: '£' })).toEqual('£123,5k');
          expect(Helper.abbreviateCurrency('567890', { locale: 'fr', unit: '€' })).toEqual('567,9k €');
          expect(Helper.abbreviateCurrency('987654321', { locale: 'en', unit: '£' })).toEqual('£987,7m');
          expect(Helper.abbreviateCurrency('234567890', { locale: 'fr', unit: '€' })).toEqual('234,6m €');
        });
      });
  
      describe('when locale is not set', () => {
        beforeEach(() => {
          I18n.locale = null;
        });
  
        afterEach(() => {
          I18n.locale = 'en';
        });
  
        it('defaults to en', () => {
          expect(Helper.abbreviateCurrency('-345')).toEqual('£-345.00');
        });
      });
    });
  
    describe('abbreviateNumber', () => {
      it('creates the correct suffixes at the correct points', () => {
        expect(Helper.abbreviateNumber('949')).toEqual('949.00');
        expect(Helper.abbreviateNumber('950')).toEqual('1.0k');
        expect(Helper.abbreviateNumber('1049')).toEqual('1.0k');
        expect(Helper.abbreviateNumber('1050')).toEqual('1.1k');
        expect(Helper.abbreviateNumber('9949')).toEqual('9.9k');
        expect(Helper.abbreviateNumber('9950')).toEqual('10.0k');
        expect(Helper.abbreviateNumber('99949')).toEqual('99.9k');
        expect(Helper.abbreviateNumber('99950')).toEqual('100.0k');
        expect(Helper.abbreviateNumber('999949')).toEqual('999.9k');
        expect(Helper.abbreviateNumber('999950')).toEqual('1.0m');
        expect(Helper.abbreviateNumber('1049000')).toEqual('1.0m');
        expect(Helper.abbreviateNumber('1050000')).toEqual('1.1m');
        expect(Helper.abbreviateNumber('-1050000')).toEqual('-1.1m');
        expect(Helper.abbreviateNumber(-1000000)).toEqual('-1.0m');
        expect(Helper.abbreviateNumber('1000000000')).toEqual('1,000.0m');
      });
    });
  
    describe('roundForAbbreviation', () => {
      it('formats a whole number to one decimal place after applying the divisor', () => {
        expect(Helper.roundForAbbreviation(1000, 100)).toEqual('1.0');
      });
  
      describe('when locale separator is not a dot', () => {
        beforeEach(() => {
          I18n.locale = 'fr';
        });
  
        afterEach(() => {
          I18n.locale = 'en';
        });
        it('returns the decimal with the correct separator', () => {
          expect(Helper.roundForAbbreviation(1000, 100)).toEqual('1,0');
        });
      });
    });
  
    describe('humanizeFilesize', () => {
      it('returns a human readable version of x bytes', () => {
        expect(Helper.humanizeFilesize(0)).toEqual('0 Bytes');
        expect(Helper.humanizeFilesize(1500)).toEqual('1.5 KB');
        expect(Helper.humanizeFilesize(15000)).toEqual('15 KB');
        expect(Helper.humanizeFilesize(150000)).toEqual('150 KB');
        expect(Helper.humanizeFilesize(1500000)).toEqual('1.5 MB');
        expect(Helper.humanizeFilesize(15000000)).toEqual('15 MB');
        expect(Helper.humanizeFilesize(150000000)).toEqual('150 MB');
        expect(Helper.humanizeFilesize(1500000000)).toEqual('1.5 GB');
        expect(Helper.humanizeFilesize(15000000000)).toEqual('15 GB');
        expect(Helper.humanizeFilesize(150000000000)).toEqual('150 GB');
        expect(Helper.humanizeFilesize(1500000000000)).toEqual('1.5 TB');
        expect(Helper.humanizeFilesize(15000000000000)).toEqual('15 TB');
      });
    });
  
    describe('formatCurrency', () => {
      describe('when a value is provided with no options', () => {
        it('returns a formatted value based on defaults', () => {
          expect(Helper.formatCurrency(1337)).toEqual('£1,337.00');
        });
      });
  
      describe('when a value is provided with a set locale', () => {
        it('returns a formatted value based on locale', () => {
          expect(Helper.formatCurrency(1337, { locale: 'fr' })).toEqual('1,337.00 €');
        });
      });
  
      describe('when a value is provided with a set precision', () => {
        it('returns a formatted value based on precision', () => {
          expect(Helper.formatCurrency(1337, { precision: '3' })).toEqual('£1,337.000');
        });
      });
  
      describe('when 0 is provided as precision', () => {
        it('returns an integer with no decimal', () => {
          expect(Helper.formatCurrency(1337, { precision: 0 })).toEqual('£1,337');
          expect(Helper.formatCurrency(1337, { precision: '0' })).toEqual('£1,337');
        });
      });
  
      describe('when a value is provided with a set unit', () => {
        it('returns a formatted value based on defaults and set unit', () => {
          expect(Helper.formatCurrency(1337, { unit: '$' })).toEqual('$1,337.00');
        });
      });
  
      describe('when a value is provided with a set format', () => {
        it('returns a formatted value based on defaults and set unit', () => {
          expect(Helper.formatCurrency(1337, { format: '%u %n' })).toEqual('£ 1,337.00');
        });
      });
  
      describe('when a value is not provided', () => {
        it('returns the 0.00 value', () => {
          expect(Helper.formatCurrency()).toEqual('£0.00');
        });
      });
  
      describe('when no locale is set', () => {
        beforeEach(() => {
          I18n.locale = null;
        });
  
        afterEach(() => {
          I18n.locale = 'en';
        });
  
        it('defaults to en', () => {
          expect(Helper.formatCurrency(1337)).toEqual('£1,337.00');
        });
      });
    });
  });
  