fix some tests

fix merge issues

src/pages/CategoryPage/CategoryView.test.js

@@ -0,0 +1,24 @@
+import {shallow} from 'enzyme';
+import React from 'react';
+import {CategoryView} from './CategoryView';
+
+describe('<CategoryView/>', function () {
+    function instance() {
+        return shallow(<CategoryView match={{params: {id: 10}}}/>);
+    }
+
+    it('renders without crashing ', function () {
+        const wrapper = instance();
+        wrapper.unmount();
+    });
+
+    it('test backbutton', function () {
+        const wrapper = instance();
+        const func = jest.fn();
+        wrapper.setProps({history: {push: func}});
+
+        expect(func).toHaveBeenCalledTimes(0);
+        wrapper.find('button').simulate('click');
+        expect(func).toHaveBeenCalledTimes(1);
+    });
+});