Add Unit Tests for ForceGraphArrowLink

Signed-off-by: Etienne Carriere <etienne.a.carriere@socgen.com>

packages/jaeger-ui/src/components/DependencyGraph/ForceGraphArrowLink.test.js

@@ -0,0 +1,77 @@
+// Copyright (c) 2019 Uber Technologies, Inc.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+import React from 'react';
+import { shallow } from 'enzyme';
+
+import ForceGraphArrowLink from './ForceGraphArrowLink';
+
+const defaultProps = {
+  link: {
+    source: 'a',
+    target: 'b',
+    value: 5,
+  },
+};
+
+describe('<ForceGraphArrowLink />', () => {
+  it('should a standard size of the arrow', () => {
+    const wrapper = shallow(
+      <ForceGraphArrowLink {...defaultProps} link={{ ...defaultProps.link, value: 9 }} />
+    );
+
+    const marker = wrapper
+      .find('g')
+      .first()
+      .find('defs')
+      .first()
+      .find('marker');
+    expect(marker.prop('markerWidth')).toEqual(6);
+    expect(marker.prop('markerHeight')).toEqual(4);
+    expect(marker.prop('markerUnits')).toEqual('strokeWidth');
+  });
+
+  it('should not have arrow overlapping with target node', () => {
+    const wrapper = shallow(
+      <ForceGraphArrowLink {...defaultProps} link={{ ...defaultProps.link, value: 9 }} targetRadius={2} />
+    );
+
+    const marker = wrapper
+      .find('g')
+      .first()
+      .find('defs')
+      .first()
+      .find('marker');
+    expect(marker.prop('refX')).toEqual(2 + 5);
+  });
+
+  it('should have an id with the name of source and target', () => {
+    const testLink = { source: 's_node', target: 't_node', value: 10 };
+
+    const wrapper = shallow(<ForceGraphArrowLink {...defaultProps} link={testLink} />);
+    const marker = wrapper
+      .find('g')
+      .first()
+      .find('defs')
+      .first()
+      .find('marker');
+    expect(marker.prop('id')).toEqual('arrow-s_node=>t_node');
+  });
+});