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

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

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

describe('#sum()', () => {
    it('sum(self::*)', () => {
        const doc = initDoc(`
      <div id="FunctionNumberCase">
        <div id="FunctionNumberCaseNumber">123</div>
        <div id="FunctionNumberCaseNotNumber">  a a  </div>
        <div id="FunctionNumberCaseNumberMultiple">
          <div>-10</div>
          <div>11</div>
          <div>99</div>
        </div>
        <div id="FunctionNumberCaseNotNumberMultiple">
          <div>-10</div>
          <div>11</div>
          <div>a</div>
        </div>
        <div id="FunctionSumCaseJavarosa">
          <div>-10</div>
          <div>15</div>
          <div></div>
        </div>
      </div>`);

        let node = doc.getElementById('FunctionNumberCaseNumberMultiple');
        assertNumberValue(node, null, 'sum(*)', 100);

        node = doc.getElementById('FunctionNumberCaseNumber');
        assertNumberValue(node, null, 'sum(self::*)', 123);

        node = doc.getElementById('FunctionNumberCaseNotNumberMultiple');
        assertNumberValue(node, null, 'sum(node())', NaN);
    });

    it('sum(*)', () => {
        const doc = initDoc(`
      <root id="root">
        <item>-10</item>
        <item>11</item>
        <item>99</item>
      </root>`);
        const node = doc.getElementById('root');
        assertNumberValue(node, null, 'sum(*)', 100);
        assertNumberValue('sum(/root/item)', 100);
    });

    it('sum() fails when too many arguments are provided', () => {
        assertThrow('sum(1, 2)');
    });

    it('sum() fails when too few arguments are provided', () => {
        assertThrow('sum()');
    });
});