(Swift 3,4,5...) XML Sort Records by Content

Demonstrates the SortRecordsByContent method.

The input XML, available at http://www.chilkatsoft.com/data/fruitRecordsSort.xml, is this:

<root>
    <fruits>
        <fruit>
            <name>apple</name>
            <color>red</color>
        </fruit>
        <fruit>
            <name>banana</name>
            <color>yellow</color>
        </fruit>
        <fruit>
            <name>blackberry</name>
            <color>purple</color>
        </fruit>
        <fruit>
            <name>blueberry</name>
            <color>blue</color>
        </fruit>
        <fruit>
            <name>orange</name>
            <color>orange</color>
        </fruit>
        <fruit>
            <name>pear</name>
            <color>green</color>
        </fruit>
    </fruits>
</root>

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func chilkatTest() {
    let xml = CkoXml()!
    var xSortRoot: CkoXml?

    var success: Bool
    // The sample input XML is available at http://www.chilkatsoft.com/data/fruitRecordsSort.xml
    success = xml.loadFile("fruitRecordsSort.xml")
    if success != true {
        print("\(xml.lastErrorText!)")
        return
    }

    // The "fruit" records are direct children of the "fruits" node.
    // Therefore, to sort the fruit records, the SortRecordsByContent
    // method must be called from the "fruits" node.
    xSortRoot = xml.findChild("fruits")

    // Sort by the "name" field in ascending order.
    var bAscending: Bool = true
    xSortRoot!.sortRecords(byContent: "name", ascending: bAscending)

    // Show the result:
    print("\(xml.getXml()!)")

    // <root>
    //     <fruits>
    //         <fruit>
    //             <name>apple</name>
    //             <color>red</color>
    //         </fruit>
    //         <fruit>
    //             <name>banana</name>
    //             <color>yellow</color>
    //         </fruit>
    //         <fruit>
    //             <name>blackberry</name>
    //             <color>purple</color>
    //         </fruit>
    //         <fruit>
    //             <name>blueberry</name>
    //             <color>blue</color>
    //         </fruit>
    //         <fruit>
    //             <name>orange</name>
    //             <color>orange</color>
    //         </fruit>
    //         <fruit>
    //             <name>pear</name>
    //             <color>green</color>
    //         </fruit>
    //     </fruits>
    // </root>

    xSortRoot = nil

}