import { timezone as timezoneService } from './timezone.service';
import { defaultFormats } from '../date/date.module';

import * as moment from 'moment';
import 'moment-timezone';

import { timezones } from './timezone.enum';

describe('timezone', (): void => {
	it('should return the timezone', (): void => {
		let date: moment.Moment = moment('2001-4-1T12:00:00-07:00', defaultFormats.isoFormat).tz(timezones.PST.momentName);
		expect(timezoneService.getTimezone(date)).to.equal('-07:00');
	});

	it('should handle daylight savings time', (): void => {
		let dateWithoutDaylightSavings: moment.Moment = moment('2016-2-1T12:00:00-07:00', defaultFormats.isoFormat).tz(timezones.PST.momentName);
		let dateWithDaylightSavings: moment.Moment = moment('2016-4-1T12:00:00-07:00', defaultFormats.isoFormat).tz(timezones.PST.momentName);
		expect(timezoneService.getTimezone(dateWithoutDaylightSavings)).to.equal('-08:00');
		expect(timezoneService.getTimezone(dateWithDaylightSavings)).to.equal('-07:00');
	});
	});
});
import { timezone } from './timezone.service';
import { defaultFormats } from '../date/date.module';

import * as moment from 'moment';
import 'moment-timezone';

describe('timezone', (): void => {
	it('should return the timezone', (): void => {
		let date: moment.Moment = moment('2001-4-1T12:00:00-07:00', defaultFormats.isoFormat).tz('America/Los_Angeles');
		expect(timezone.getTimezone(date)).to.equal('-07:00');
	});

	it('should handle daylight savings time', (): void => {
		let dateWithoutDaylightSavings: moment.Moment = moment('2016-2-1T12:00:00-07:00', defaultFormats.isoFormat).tz('America/Los_Angeles');
		let dateWithDaylightSavings: moment.Moment = moment('2016-4-1T12:00:00-07:00', defaultFormats.isoFormat).tz('America/Los_Angeles');
		expect(timezone.getTimezone(dateWithoutDaylightSavings)).to.equal('-08:00');
		expect(timezone.getTimezone(dateWithDaylightSavings)).to.equal('-07:00');
	});
});
--- 
+++ 
@@ -1,19 +1,22 @@
-import { timezone } from './timezone.service';
+import { timezone as timezoneService } from './timezone.service';
 import { defaultFormats } from '../date/date.module';
 
 import * as moment from 'moment';
 import 'moment-timezone';
 
+import { timezones } from './timezone.enum';
+
 describe('timezone', (): void => {
 	it('should return the timezone', (): void => {
-		let date: moment.Moment = moment('2001-4-1T12:00:00-07:00', defaultFormats.isoFormat).tz('America/Los_Angeles');
-		expect(timezone.getTimezone(date)).to.equal('-07:00');
+		let date: moment.Moment = moment('2001-4-1T12:00:00-07:00', defaultFormats.isoFormat).tz(timezones.PST.momentName);
+		expect(timezoneService.getTimezone(date)).to.equal('-07:00');
 	});
 
 	it('should handle daylight savings time', (): void => {
-		let dateWithoutDaylightSavings: moment.Moment = moment('2016-2-1T12:00:00-07:00', defaultFormats.isoFormat).tz('America/Los_Angeles');
-		let dateWithDaylightSavings: moment.Moment = moment('2016-4-1T12:00:00-07:00', defaultFormats.isoFormat).tz('America/Los_Angeles');
-		expect(timezone.getTimezone(dateWithoutDaylightSavings)).to.equal('-08:00');
-		expect(timezone.getTimezone(dateWithDaylightSavings)).to.equal('-07:00');
+		let dateWithoutDaylightSavings: moment.Moment = moment('2016-2-1T12:00:00-07:00', defaultFormats.isoFormat).tz(timezones.PST.momentName);
+		let dateWithDaylightSavings: moment.Moment = moment('2016-4-1T12:00:00-07:00', defaultFormats.isoFormat).tz(timezones.PST.momentName);
+		expect(timezoneService.getTimezone(dateWithoutDaylightSavings)).to.equal('-08:00');
+		expect(timezoneService.getTimezone(dateWithDaylightSavings)).to.equal('-07:00');
+	});
 	});
 });
Use the PST timezone instead of a magic string. Renamed timezone to timezoneService for clarity.
