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

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

const { assertNumberValue } = require('../helpers');

describe('#pow()', () => {
    describe('should return power of text values', () => {
        it('3^0', () => {
            assertNumberValue('3', 'pow(/simple/xpath/to/node, 0)', 1);
        });
        it('1^3', () => {
            assertNumberValue('1', 'pow(/simple/xpath/to/node, 3)', 1);
        });
        it('4^2', () => {
            assertNumberValue('4', 'pow(/simple/xpath/to/node, 2)', 16);
        });
        it('no input pow', () => {
            assertNumberValue('pow(2, 2)', 4);
            assertNumberValue('pow(2, 0)', 1);
            assertNumberValue('pow(0, 4)', 0);
            assertNumberValue('pow(2.5, 2)', 6.25);
            assertNumberValue('pow(0.5, 2)', 0.25);
            assertNumberValue('pow(-1, 2)', 1);
            assertNumberValue('pow(-1, 3)', -1);
            assertNumberValue('pow(4, 0.5)', 2);
            assertNumberValue('pow(16, 0.25)', 2);
        });
    });
});