Update test to be more descriptive

Author: TimvdLippe

test/unit/property-accessors.html

@@ -112,20 +112,27 @@
 
     })
   });
-  test('testing for deserialization of date', function(done) {
-    var dateArr = [];
-    dateArr[0] = new Date();
-    dateArr[1] = String(dateArr[0].getTime()); //string timestamp
-    dateArr[2] = dateArr[0].getTime(); //number timestamp
-    dateArr[3] = dateArr[0].toString(); //full date
-    setTimeout(function(){
-      let ser = [];
-      ser[0] = window.XFoo.prototype._deserializeValue(dateArr[1], Date);
-      ser[1] = window.XFoo.prototype._deserializeValue(dateArr[2], Date);
-      ser[2] = window.XFoo.prototype._deserializeValue(dateArr[3], Date);
-      assert.equal(ser[0].getTime(), ser[1].getTime());
-      assert.equal(ser[0].toString(), dateArr[3]);
-      done();
+
+  suite('testing for deserialization of date', function() {
+    let date;
+
+    setup(function() {
+      date = new Date();
+    });
+
+    test('can handle string timestamp', function() {
+      const deserializedDate = window.XFoo.prototype._deserializeValue(String(date.getTime()), Date);
+      assert.equal(deserializedDate.getTime(), date.getTime());
+    });
+
+    test('can handle number timestamp', function() {
+      const deserializedDate = window.XFoo.prototype._deserializeValue(date.getTime(), Date);
+      assert.equal(deserializedDate.getTime(), date.getTime());
+    });
+
+    test('can handle full date', function() {
+      const deserializedDate = window.XFoo.prototype._deserializeValue(date.toString(), Date);
+      assert.equal(deserializedDate.toString(), date.toString());
     });
   });