Fix & Add unit tests.

__tests__/components/Lookup.test.jsx

@@ -0,0 +1,33 @@
+import React from 'react';
+import { mount } from 'enzyme';
+import Lookup from '../../src/components/Lookup';
+import { I18nProvider } from '@lingui/react';
+
+
+const mockData = [{ name: 'foo', id: 0, isChecked: false }];
+describe('<Lookup />', () => {
+  test('initially renders succesfully', () => {
+    mount(
+      <Lookup
+        lookup_header="Foo Bar"
+        lookupChange={() => { }}
+        data={mockData}
+      />
+    );
+  });
+  test('calls "onLookup" when search icon is clicked', () => {
+    const spy = jest.spyOn(Lookup.prototype, 'onLookup');
+    const wrapper = mount(
+      <I18nProvider>
+      <Lookup
+        lookup_header="Foo Bar"
+        lookupChange={() => { }}
+        data={mockData}
+      />
+      </I18nProvider>
+    );
+    expect(spy).not.toHaveBeenCalled();
+    wrapper.find('#search').simulate('click');
+    expect(spy).toHaveBeenCalled();
+  });
+});