Refactor of DataListToolbar. Creates a number of smaller components used by the toolbar. Adds support for passing in an add button node to the toolbar.

__tests__/components/Search.test.jsx

@@ -0,0 +1,78 @@
+import React from 'react';
+import { mount } from 'enzyme';
+import { I18nProvider } from '@lingui/react';
+import Search from '../../src/components/Search';
+
+describe('<Search />', () => {
+  let search;
+
+  afterEach(() => {
+    if (search) {
+      search.unmount();
+      search = null;
+    }
+  });
+
+  test('it triggers the expected callbacks', () => {
+    const columns = [{ name: 'Name', key: 'name', isSortable: true }];
+
+    const searchBtn = 'button[aria-label="Search"]';
+    const searchTextInput = 'input[aria-label="Search text input"]';
+
+    const onSearch = jest.fn();
+
+    search = mount(
+      <I18nProvider>
+        <Search
+          sortedColumnKey="name"
+          columns={columns}
+          onSearch={onSearch}
+        />
+      </I18nProvider>
+    );
+
+    search.find(searchTextInput).instance().value = 'test-321';
+    search.find(searchTextInput).simulate('change');
+    search.find(searchBtn).simulate('click');
+
+    expect(onSearch).toHaveBeenCalledTimes(1);
+    expect(onSearch).toBeCalledWith('test-321');
+  });
+
+  test('onSearchDropdownToggle properly updates state', async () => {
+    const columns = [{ name: 'Name', key: 'name', isSortable: true }];
+    const onSearch = jest.fn();
+    const wrapper = mount(
+      <I18nProvider>
+        <Search
+          sortedColumnKey="name"
+          columns={columns}
+          onSearch={onSearch}
+        />
+      </I18nProvider>
+    ).find('Search');
+    expect(wrapper.state('isSearchDropdownOpen')).toEqual(false);
+    wrapper.instance().onSearchDropdownToggle(true);
+    expect(wrapper.state('isSearchDropdownOpen')).toEqual(true);
+  });
+
+  test('onSearchDropdownSelect properly updates state', async () => {
+    const columns = [
+      { name: 'Name', key: 'name', isSortable: true },
+      { name: 'Description', key: 'description', isSortable: true }
+    ];
+    const onSearch = jest.fn();
+    const wrapper = mount(
+      <I18nProvider>
+        <Search
+          sortedColumnKey="name"
+          columns={columns}
+          onSearch={onSearch}
+        />
+      </I18nProvider>
+    ).find('Search');
+    expect(wrapper.state('searchKey')).toEqual('name');
+    wrapper.instance().onSearchDropdownSelect({ target: { innerText: 'Description' } });
+    expect(wrapper.state('searchKey')).toEqual('description');
+  });
+});