added more working DOM test cases for JS

libraries/stdlib/test/js/JsDomTest.kt

@@ -0,0 +1,52 @@
+package test.js
+
+import kotlin.*
+import kotlin.browser.*
+import kotlin.dom.*
+import kotlin.test.*
+import org.w3c.dom.*
+import org.junit.Test as test
+
+class JsDomTest {
+
+    test fun testCreateDocument() {
+        var doc = document
+        assertNotNull(doc, "Should have created a document")
+
+        val e = doc.createElement("foo")!!
+        assertCssClass(e, "")
+
+        // now lets update the cssClass property
+        e.classes = "foo"
+        assertCssClass(e, "foo")
+
+        // now using the attribute directly
+        e.setAttribute("class", "bar")
+        assertCssClass(e, "bar")
+    }
+
+    test fun addText() {
+        var doc = document
+        assertNotNull(doc, "Should have created a document")
+
+        val e = doc.createElement("foo")!!
+        e + "hello"
+
+        val xml = e.toXmlString()
+        println("element after text ${xml}")
+
+        assertEquals("hello", e.text)
+
+    }
+
+
+    fun assertCssClass(e: Element, value: String?): Unit {
+        val cl = e.classes
+        val cl2 = e.getAttribute("class") ?: ""
+        val xml = e.toXmlString()
+        println("element ${xml} has cssClass `${cl}` class attr `${cl2}`")
+
+        assertEquals(value, cl, "value of element.cssClass")
+        assertEquals(value, cl2, "value of element.getAttribute(\"class\")")
+    }
+}