Add test coverage around EmpasizedNode (jaegertracing#624)

Signed-off-by: Tim Klever <Tim.V.Klever@aexp.com>
Signed-off-by: vvvprabhakar <vvvprabhakar@gmail.com>

packages/jaeger-ui/src/components/common/EmphasizedNode.test.js

@@ -0,0 +1,35 @@
+// Copyright (c) 2020 The Jaeger Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import React from 'react';
+import { shallow } from 'enzyme';
+import EmphasizedNode from './EmphasizedNode';
+
+describe('<EmphasizedNode>', () => {
+  let wrapper;
+  let defaultProps;
+
+  beforeEach(() => {
+    defaultProps = {
+      height: 100,
+      width: 500,
+    };
+
+    wrapper = shallow(<EmphasizedNode {...defaultProps} />);
+  });
+
+  it('renders with default props', () => {
+    expect(wrapper).toMatchSnapshot();
+  });
+});

packages/jaeger-ui/src/components/common/__snapshots__/EmphasizedNode.test.js.snap

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+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`<EmphasizedNode> renders with default props 1`] = `
+<Fragment>
+  <rect
+    className="EmphasizedNode--contrast is-non-scaling"
+    height={100}
+    vectorEffect="non-scaling-stroke"
+    width={500}
+  />
+  <rect
+    className="EmphasizedNode--contrast is-scaling"
+    height={100}
+    width={500}
+  />
+  <rect
+    className="EmphasizedNode is-non-scaling"
+    height={100}
+    vectorEffect="non-scaling-stroke"
+    width={500}
+  />
+  <rect
+    className="EmphasizedNode is-scaling"
+    height={100}
+    width={500}
+  />
+</Fragment>
+`;