Supporting DOM element param

src/demo/tests/DOMElementDemo.test.js

@@ -0,0 +1,22 @@
+import DOMElementDemo from '../DOMElementDemo';
+import Keyboard from '../../lib/components/Keyboard';
+
+it('Demo will load', () => {
+  new DOMElementDemo();
+});
+
+it('Demo keyboards will be instantiated', () => {
+  const demo = new DOMElementDemo();
+  expect(demo.keyboard1).toBeInstanceOf(Keyboard);
+  expect(demo.keyboard2).toBeInstanceOf(Keyboard);
+});
+
+it('Demo input change will work', () => {
+  const demo = new DOMElementDemo();
+
+  demo.keyboard1.getButtonElement("q").onclick();
+  demo.keyboard2.getButtonElement("e").onclick();
+  
+  expect(demo.keyboard1.getInput()).toBe("q");
+  expect(demo.keyboard2.getInput()).toBe("e");
+});