openrosa-xpath-evaluator/test/integration/openrosa-xpath/uuid.spec.js

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

const { assert } = require('chai');
const { assertMatch, assertStringLength, initDoc } = require('../helpers');

describe('#uuid()', () => {
    it('should provide an RFC 4122 version 4 compliant UUID string', () => {
        assertMatch(
            'uuid()',
            /^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i
        );
    });

    it('uuid()', () => {
        assertStringLength('uuid()', 36);
    });

    it('should provide variable length token', () => {
        [
            ['uuid()', 36],
            ['uuid(6)', 6],
            ['uuid(16)', 16],
            ['uuid(20)', 20],
            ['uuid(0)', 0],
        ].forEach(([expr, expectedLength]) => {
            assertStringLength(expr, expectedLength);
        });
    });

    describe('referencing nodesets', () => {
        const doc = initDoc(`
      <numbers>
        <one>1</one>
        <two>2</two>
        <six>6</six>
        <ninetynine>99</ninetynine>
      </numbers>
    `);

        [
            ['uuid(/numbers/one)', 1],
            ['uuid(/numbers/two)', 2],
            ['uuid(/numbers/six)', 6],
            ['uuid(/numbers/ninetynine)', 99],
        ].forEach(([expr, expectedLength]) => {
            it(`should evaluate '${expr}' to a ${expectedLength} string`, () => {
                assert.equal(
                    doc.xEval(expr).stringValue.length,
                    expectedLength
                );
            });
        });

        ['uuid(/nonsense)', 'uuid(/numbers)'].forEach((expr) => {
            it(`should throw an error when evaluating '${expr}' because the nodeset evaluates to NaN`, () => {
                assert.throw(() => doc.xEval(expr));
            });
        });
    });
});