Add fetch and tests for Ring [skip ci]

Author: raju249

javascript/grid-ui/src/tests/Ring.test.tsx

@@ -0,0 +1,27 @@
+import React from 'react';
+import { shallow, mount } from 'enzyme';
+import Ring from '../components/RingSystem/Ring/Ring';
+
+test('Ring component', () => {
+  let parentFunc = function() {
+    console.log('Dummy parent func');
+  }
+  
+  const ring = shallow(<Ring 
+      radius={2}
+      stroke={1}
+      id={'2'}
+      color={'#00000'}
+      progress={10}
+      offset={1}
+      parentCB={parentFunc}
+      label={'random label'}
+    />)
+
+  const props = ring.getElements()[0].props.children.props.children.props;
+  const circle = props.children[0].props;
+
+  expect(parseInt(props.id)).toEqual(2);
+  expect(parseInt(props.height)).toEqual(4);
+  expect(parseInt(props.width)).toEqual(4);
+});