add some unit tests

pretify episodepage

src/elements/DynamicContentContainer/DynamicContentContainer.module.css

@@ -1,4 +1,5 @@
 .maincontent {
     float: left;
     width: 70%;
+    flex: 1;
 }

src/elements/DynamicContentContainer/DynamicContentContainer.test.js

@@ -27,4 +27,11 @@ describe('<DynamicContentContainer/>', function () {
         expect(wrapper.find('a')).toHaveLength(0);
         expect(wrapper.find('.maincontent').text()).toBe('no items to show!');
     });
+
+    it('test clean', function () {
+        const wrapper = shallow(<DynamicContentContainer data={[{}, {}, {}]} renderElement={(el) => (<a/>)}/>);
+        expect(wrapper.find('a')).toHaveLength(3);
+        wrapper.instance().clean();
+        expect(wrapper.find('a')).toHaveLength(0);
+    });
 });