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import {DateTime, dateTimeToExpr, dateTimeToTimestamp, isDateTime} from '../src/datetime';import * as log from '../src/log';
describe('datetime', () => {  describe('isDateTime', () => {    it('correctly classifies unit with zero', () => {      expect(isDateTime({hours: 0})).toEqual(true);    });  });
  describe('dateTimeToExpr', () => {    it(      'should drop day if day is combined with year/month/date',      log.wrap(localLogger => {        const d = {          year: 2007,          day: 'monday'        };        const expr = dateTimeToExpr(d);        expect(expr).toBe('datetime(2007, 0, 1, 0, 0, 0, 0)');        expect(localLogger.warns[0]).toEqual(log.message.droppedDay(d));      })    );
    it('should normalize numeric quarter correctly', () => {      const expr = dateTimeToExpr({        quarter: 2      });      expect(expr).toBe('datetime(2012, 3, 1, 0, 0, 0, 0)');    });
    it(      'should log warning for quarter > 4',      log.wrap(localLogger => {        expect(          dateTimeToExpr({            quarter: 5          })        ).toBe('datetime(2012, 12, 1, 0, 0, 0, 0)');        expect(localLogger.warns[0]).toEqual(log.message.invalidTimeUnit('quarter', 5));      })    );
    it('should throw error for invalid quarter', () => {      expect(() => {        dateTimeToExpr({quarter: 'Q'} as any);      }).toThrow();    });
    it('should normalize numeric month correctly', () => {      const expr = dateTimeToExpr({        month: 1      });      expect(expr).toBe('datetime(2012, 0, 1, 0, 0, 0, 0)');    });
    it('should normalize month name correctly', () => {      expect(        dateTimeToExpr({          month: 'January'        })      ).toBe('datetime(2012, 0, 1, 0, 0, 0, 0)');      expect(        dateTimeToExpr({          month: 'january'        })      ).toBe('datetime(2012, 0, 1, 0, 0, 0, 0)');      expect(        dateTimeToExpr({          month: 'Jan'        })      ).toBe('datetime(2012, 0, 1, 0, 0, 0, 0)');      expect(        dateTimeToExpr({          month: 'jan'        })      ).toBe('datetime(2012, 0, 1, 0, 0, 0, 0)');    });
    it('should throw error for invalid month', () => {      expect(() => {        dateTimeToExpr({month: 'J'});      }).toThrow();    });
    it('should normalize numeric day (of week) correctly', () => {      expect(        dateTimeToExpr({          day: 0        })      ).toBe('datetime(2012, 0, 1, 0, 0, 0, 0)');      expect(        dateTimeToExpr({          day: 7        })      ).toBe('datetime(2012, 0, 1, 0, 0, 0, 0)');    });
    it('should normalize day name correctly and use year 2006 to ensure correct', () => {      expect(        dateTimeToExpr({          day: 'Sunday'        })      ).toBe('datetime(2012, 0, 1, 0, 0, 0, 0)');      expect(        dateTimeToExpr({          day: 'sunday'        })      ).toBe('datetime(2012, 0, 1, 0, 0, 0, 0)');      expect(        dateTimeToExpr({          day: 'Sun'        })      ).toBe('datetime(2012, 0, 1, 0, 0, 0, 0)');      expect(        dateTimeToExpr({          day: 'sun'        })      ).toBe('datetime(2012, 0, 1, 0, 0, 0, 0)');    });
    it('should throw error for invalid day', () => {      expect(() => {        dateTimeToExpr({day: 'S'});      }).toThrow();    });
    it('should use utc expression if utc is specified', () => {      const d: DateTime = {        year: 2007,        date: 1,        utc: true      };      const expr = dateTimeToExpr(d);      expect(expr).toBe('utc(2007, 0, 1, 0, 0, 0, 0)');    });
    // Note: Other part of coverage handled by timeUnit.fieldExpr's test  });
  describe('dateTimeToTimestamp', () => {    it('should return date as timestamp if specified with month number', () => {      const d: DateTime = {        year: 1970,        month: 1, // January        date: 1      };      const expr = dateTimeToTimestamp(d);      expect(expr).toBe(+new Date(1970, 0, 1, 0, 0, 0, 0));    });
    it('should return date as timestamp if specified with month name', () => {      const d: DateTime = {        year: 1970,        month: 'January',        date: 1      };      const expr = dateTimeToTimestamp(d);      expect(expr).toBe(+new Date(1970, 0, 1, 0, 0, 0, 0));    });
    it('should use UTC if specified', () => {      const d: DateTime = {        year: 2007,        date: 1,        utc: true      };      const exprJSON = dateTimeToTimestamp(d);      expect(exprJSON).toBe(+new Date(Date.UTC(2007, 0, 1, 0, 0, 0, 0)));    });
    it('should support accidental use of strings', () => {      const d: any = {        year: '2007',        month: '1',        date: '1'      };      const exprJSON = dateTimeToTimestamp(d);      expect(exprJSON).toBe(+new Date(2007, 0, 1, 0, 0, 0, 0));    });  });});