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

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

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

describe('#coalesce()', () => {
    it('should return first value if provided via xpath', () => {
        assertStringValue(
            'first',
            'coalesce(/simple/xpath/to/node, "whatever")',
            'first'
        );
    });

    it('should return first value if provided via string', () => {
        assertStringValue('coalesce("FIRST", "whatever")', 'FIRST');
    });

    it('should return second value from xpath if first value is empty string', () => {
        assertStringValue(
            'second',
            'coalesce("", /simple/xpath/to/node)',
            'second'
        );
    });

    it('should return second value from string if first value is empty string', () => {
        assertStringValue('coalesce("", "SECOND")', 'SECOND');
        assertStringValue("coalesce('', 'ab')", 'ab');
    });

    it('should return second value from xpath if first value is empty xpath', () => {
        assertStringValue(
            'second',
            'coalesce(/simple/empty, /simple/xpath/to/node)',
            'second'
        );
    });

    it('should return second value from string if first value is empty xpath', () => {
        assertStringValue(
            '',
            'coalesce(/simple/xpath/to/node, "SECOND")',
            'SECOND'
        );
    });

    it('coalesce(self::*)', () => {
        const doc = initDoc(`
      <div id="FunctionSelectedCase">
        <div id="FunctionSelectedCaseEmpty"></div>
        <div id="FunctionSelectedCaseSingle">ab</div>
        <div id="FunctionSelectedCaseMultiple">ab cd ef gh</div>
        <div id="FunctionSelectedCaseMultiple">ij</div>
      </div>`);
        let node = doc.getElementById('FunctionSelectedCaseEmpty');
        assertStringValue(node, null, "coalesce(self::*, 'ab')", 'ab');

        node = doc.getElementById('FunctionSelectedCaseSingle');
        assertStringValue(node, null, "coalesce(self::*, 'cd')", 'ab');
    });
});