fontoxpath/test/specs/parsing/operators/numeric/BinaryOperator.tests.js

A minimalistic XPath 3.1 engine in JavaScript

import * as slimdom from 'slimdom';
import jsonMlMapper from 'test-helpers/jsonMlMapper';

import {
	evaluateXPathToBoolean,
	evaluateXPathToNumber,
	evaluateXPathToStrings
} from 'fontoxpath';

let documentNode;
beforeEach(() => {
	documentNode = new slimdom.Document();
});

describe('mathematical operators', () => {
	it('can evaluate 1 + 1 to 2',
		() => chai.assert.equal(evaluateXPathToNumber('1 + 1', documentNode), 2));

	it('can evaluate 1 - 1 to 0',
		() => chai.assert.equal(evaluateXPathToNumber('1 - 1', documentNode), 0));

	it('can evaluate 1 * 2 to 2',
		() => chai.assert.equal(evaluateXPathToNumber('1 * 2', documentNode), 2));

	it('can evaluate 1 div 2 to 0.5',
		() => chai.assert.equal(evaluateXPathToNumber('1 div 2', documentNode), 0.5));

	it('can evaluate 1 idiv 2 to 1',
		() => chai.assert.equal(evaluateXPathToNumber('1 idiv 2', documentNode), 0));

	it('uses the correct ordering',
		() => chai.assert.equal(evaluateXPathToNumber('2 idiv 2 * 2', documentNode), 2, 'This should be parsed as (2 idiv 2) * 2'));

	it('returns the empty sequence if one of the operands is the empty sequence',
		() => chai.assert.deepEqual(evaluateXPathToStrings('() + 1', documentNode), []));

	it('can evaluate 5 mod 3 to 2',
		() => chai.assert.equal(evaluateXPathToNumber('5 mod 3', documentNode), 2));

	it('throws when passed strings',
		() => chai.assert.throws(() => evaluateXPathToNumber('"something" + 1', documentNode), 'XPTY0004'));

	it('can parse untyped attributes', () => {
		jsonMlMapper.parse(['someElement', { a: '1' }], documentNode);
		chai.assert.equal(evaluateXPathToNumber('@a + 1', documentNode.documentElement), 2);
	});
});

describe('Durations', () => {
	describe('xs:yearMonthDuration', () => {
		it('can evaluate "P10Y10M" + "P10Y10M"',
			() => chai.assert.isTrue(evaluateXPathToBoolean('xs:yearMonthDuration("P10Y10M") + xs:yearMonthDuration("P10Y10M") eq xs:yearMonthDuration("P21Y8M")', documentNode)));
		it('can evaluate "P11Y10M" - "P10Y10M"',
			() => chai.assert.isTrue(evaluateXPathToBoolean('xs:yearMonthDuration("P11Y10M") - xs:yearMonthDuration("P10Y10M") eq xs:yearMonthDuration("P1Y")', documentNode)));
		it('can evaluate "P11Y10M" * 2',
			() => chai.assert.isTrue(evaluateXPathToBoolean('xs:yearMonthDuration("P1Y10M") * xs:double("2") eq xs:yearMonthDuration("P44M")', documentNode)));
		it('can evaluate "P11Y10M" div 2',
			() => chai.assert.isTrue(evaluateXPathToBoolean('xs:yearMonthDuration("P1Y10M") div xs:double("2") eq xs:yearMonthDuration("P11M")', documentNode)));
		it('can evaluate "P3Y4M" div "-P1Y4M"',
			() => chai.assert.isTrue(evaluateXPathToBoolean('xs:yearMonthDuration("P3Y4M") div xs:yearMonthDuration("-P1Y4M") eq xs:decimal("-2.5")', documentNode)));
		it('can evaluate "P3Y4M" div "P1M"',
			() => chai.assert.isTrue(evaluateXPathToBoolean('xs:yearMonthDuration("P3Y4M") div xs:yearMonthDuration("P1M") eq xs:decimal("40")', documentNode)));
	});

	describe('xs:dayTimeDuration', () => {
		it('can evaluate "P4DT26H" + "P4DT26H"',
			() => chai.assert.isTrue(evaluateXPathToBoolean('xs:dayTimeDuration("P4DT26H") + xs:dayTimeDuration("P4DT26H") eq xs:dayTimeDuration("P10DT4H")', documentNode)));
		it('can evaluate "P4DT28H" - "P4DT26H"',
			() => chai.assert.isTrue(evaluateXPathToBoolean('xs:dayTimeDuration("P4DT28H") - xs:dayTimeDuration("P4DT26H") eq xs:dayTimeDuration("PT2H")', documentNode)));
		it('can evaluate "PT20H" * 2',
			() => chai.assert.isTrue(evaluateXPathToBoolean('xs:dayTimeDuration("PT20H") * xs:double("2") eq xs:dayTimeDuration("P1DT16H")', documentNode)));
		it('can evaluate "PT11H" div 2',
			() => chai.assert.isTrue(evaluateXPathToBoolean('xs:dayTimeDuration("PT11H") div xs:double("2") eq xs:dayTimeDuration("PT5H30M")', documentNode)));
		it('can evaluate "PT10S" div "PT5S"',
			() => chai.assert.isTrue(evaluateXPathToBoolean('xs:dayTimeDuration("PT10S") div xs:dayTimeDuration("PT5S") eq xs:decimal("2")', documentNode)));
		it('can evaluate "P2DT53M11S" div "PT1S"',
			() => chai.assert.isTrue(evaluateXPathToBoolean('xs:dayTimeDuration("P2DT53M11S") div xs:dayTimeDuration("PT1S") eq xs:decimal("175991")', documentNode)));
		it('can evaluate implicit timezone div 0',
			() => chai.assert.throws(() => evaluateXPathToBoolean('fn:string(fn:implicit-timezone() div 0 )', documentNode), 'FODT0002'));
	});

	describe('xs:dateTime', () => {
		it('can subtract dateTimes', () => {
			chai.assert.isTrue(evaluateXPathToBoolean('xs:dateTime("2000-10-30T06:12:00-05:00") - xs:dateTime("1999-11-28T09:00:00Z") eq xs:dayTimeDuration("P337DT2H12M")'));
		});
	});
});