added a helper method to get the child elements of an Element by name

libraries/stdlib/src/kotlin/dom/Dom.kt

@@ -90,6 +90,11 @@ inline fun Element?.childElements(): List<Element> {
     return children().filter<Node>{ it.nodeType == Node.ELEMENT_NODE }.map { it as Element }
 }
 
+/** Returns the child elements of this element with the given name */
+inline fun Element?.childElements(name: String): List<Element> {
+    return children().filter<Node>{ it.nodeType == Node.ELEMENT_NODE && it.nodeName == name }.map { it as Element }
+}
+
 /** The descendent elements of this document */
 val Document?.elements : List<Element>
 get() = this?.getElementsByTagName("*").toElementList()
@@ -109,12 +114,12 @@ inline fun Document?.elements(localName: String): List<Element> {
     return this?.getElementsByTagName(localName).toElementList()
 }
 
-/** Returns all the child elements given the namespace URI and local element name */
+/** Returns all the descendant elements given the namespace URI and local element name */
 inline fun Element?.elements(namespaceUri: String, localName: String): List<Element> {
     return this?.getElementsByTagNameNS(namespaceUri, localName).toElementList()
 }
 
-/** Returns all the elements given the namespace URI and local element name */
+/** Returns all the descendant elements given the namespace URI and local element name */
 inline fun Document?.elements(namespaceUri: String, localName: String): List<Element> {
     return this?.getElementsByTagNameNS(namespaceUri, localName).toElementList()
 }

libraries/stdlib/test/dom/DomBuilderTest.kt

@@ -117,6 +117,15 @@ class DomBuilderTest() {
         } else {
             fail("Not an Element $grandChild")
         }
+        val child = doc["child"].first
+        if (child != null) {
+            val gc1 = child.childElements("grandChild")
+            assertEquals(1, gc1.size, "Expected a single child but found $gc1")
+            val gc2 = child.childElements("grandChild2")
+            assertEquals(1, gc2.size, "Expected a single child but found $gc2")
+        } else {
+            fail("No child found!")
+        }
         val children = doc.documentElement.children()
         val xml = nodesToXmlString(children)
         println("root element has children: ${xml}")