Add basic TreeNode tests

Author: jakezatecky

test/TreeNode.js

@@ -0,0 +1,47 @@
+import React from 'react';
+import { shallow } from 'enzyme';
+import { assert } from 'chai';
+
+import TreeNode from '../src/js/TreeNode';
+
+describe('<TreeNode />', () => {
+	describe('component', () => {
+		it('should render the rct-node container', () => {
+			const wrapper = shallow(
+				<TreeNode
+					checked={0}
+					expanded={false}
+					label="Europa"
+					optimisticToggle
+					treeId="id"
+					value="europa"
+					onCheck={() => {}}
+					onExpand={() => {}}
+				/>,
+			);
+
+			assert.isTrue(wrapper.find('.rct-node').exists());
+		});
+	});
+
+	describe('label', () => {
+		it('should render the node\'s label', () => {
+			const wrapper = shallow(
+				<TreeNode
+					checked={0}
+					expanded={false}
+					label="Europa"
+					optimisticToggle
+					treeId="id"
+					value="europa"
+					onCheck={() => {}}
+					onExpand={() => {}}
+				/>,
+			);
+
+			assert.isTrue(wrapper.contains(
+				<span className="rct-title">Europa</span>,
+			));
+		});
+	});
+});