added paragraph properties and style tests

ts/tests/stylesTest.ts

@@ -0,0 +1,22 @@
+/// <reference path="../typings/mocha/mocha.d.ts" />
+/// <reference path="../typings/chai/chai.d.ts" />
+import {Styles} from "../styles";
+import {assert} from "chai";
+
+describe("Styles", () => {
+    var styles: Styles;
+
+    beforeEach(() => {
+        styles = new Styles();
+    });
+
+    describe('#constructor()', () => {
+
+        it("should not add val with empty constructor", () => {
+            var newAttrs = new Styles();
+            var stringifiedJson = JSON.stringify(newAttrs);
+            var newJson = JSON.parse(stringifiedJson);
+            assert.isUndefined(newJson.root.val);
+        });
+    });
+});