openrosa-xpath-evaluator/test/unit/date-extensions.spec.js

Wrapper for browsers' XPath evaluator with added support for OpenRosa extensions.

/**
 * @module date.spec
 * @see {@link https://github.com/medic/cht-core/blob/2c1db1618bdafc5ec14c3a27aa4a37249fcc1b4a/webapp/tests/mocha/unit/enketo/medic-xpath-extensions.spec.js}
 *
 * Note: These tests were adapted from `medic/cht-core`.
 */

const { assert } = require('chai');
const sinon = require('sinon');
const {
    getTimezoneOffsetAsTime,
    toISOLocalString,
} = require('../../src/date-extensions');

describe('Date helpers', () => {
    /** @type {import('sinon').SinonSandbox} */
    let sandbox;

    /** @type {number} */
    let timezoneOffset;

    beforeEach(() => {
        sandbox = sinon.createSandbox();

        timezoneOffset = 0;

        sandbox
            .stub(Date.prototype, 'getTimezoneOffset')
            .callsFake(() => timezoneOffset);
    });

    afterEach(() => {
        sandbox.restore();
    });

    describe('legacy prototype methods', () => {
        describe('getTimezoneOffsetAsTime', () => {
            it('returns the time zone offset in hours when given a time zone difference in minutes', () => {
                timezoneOffset = -60;

                assert.equal(new Date().getTimezoneOffsetAsTime(), '+01:00');
            });

            it('returns a negative time zone offset when given a positive time zone difference', () => {
                timezoneOffset = 60;

                assert.equal(new Date().getTimezoneOffsetAsTime(), '-01:00');
            });
        });

        describe('toISOLocalString', () => {
            it('returns the ISO local string consistent with a negative time zone offset', () => {
                const date = new Date('1975-08-19T23:15:30.000+07:00');

                timezoneOffset = -60;

                assert.equal(
                    date.toISOLocalString(),
                    '1975-08-19T17:15:30.000+01:00'
                );
            });

            it('returns the ISO local string consistent with a positive time zone offset', () => {
                const date = new Date('1975-08-19T23:15:30.000+07:00');

                timezoneOffset = 60;

                assert.equal(
                    date.toISOLocalString(),
                    '1975-08-19T15:15:30.000-01:00'
                );
            });
        });
    });

    describe('plain functions', () => {
        describe('getTimezoneOffsetAsTime', () => {
            it('returns the time zone offset in hours when given a time zone difference in minutes', () => {
                timezoneOffset = -60;

                assert.equal(getTimezoneOffsetAsTime(new Date()), '+01:00');
            });

            it('returns a negative time zone offset when given a positive time zone difference', () => {
                timezoneOffset = 60;

                assert.equal(getTimezoneOffsetAsTime(new Date()), '-01:00');
            });
        });

        describe('toISOLocalString', () => {
            it('returns the ISO local string consistent with a negative time zone offset', () => {
                const date = new Date('1975-08-19T23:15:30.000+07:00');

                timezoneOffset = -60;

                assert.equal(
                    toISOLocalString(date),
                    '1975-08-19T17:15:30.000+01:00'
                );
            });

            it('returns the ISO local string consistent with a positive time zone offset', () => {
                const date = new Date('1975-08-19T23:15:30.000+07:00');

                timezoneOffset = 60;

                assert.equal(
                    toISOLocalString(date),
                    '1975-08-19T15:15:30.000-01:00'
                );
            });
        });
    });
});