[Performance] VirtualizedSelect for SelectControl and FilterBox (#3654)

* Added virtualized select to SelectControl, allow onPaste to create new options

* Added unit tests

* Added virtualized/paste select to filterbox

superset/assets/spec/javascripts/components/OnPasteSelect_spec.jsx

@@ -0,0 +1,105 @@
+/* eslint-disable no-unused-expressions */
+import React from 'react';
+import sinon from 'sinon';
+import { expect } from 'chai';
+import { shallow } from 'enzyme';
+import { describe, it } from 'mocha';
+import VirtualizedSelect from 'react-virtualized-select';
+import Select, { Creatable } from 'react-select';
+
+import OnPasteSelect from '../../../javascripts/components/OnPasteSelect';
+
+const defaultProps = {
+  onChange: sinon.spy(),
+  multi: true,
+  isValidNewOption: sinon.spy(s => !!s.label),
+  value: [],
+  options: [
+    { value: 'United States', label: 'United States' },
+    { value: 'China', label: 'China' },
+    { value: 'India', label: 'India' },
+    { value: 'Canada', label: 'Canada' },
+    { value: 'Russian Federation', label: 'Russian Federation' },
+    { value: 'Japan', label: 'Japan' },
+    { value: 'Mexico', label: 'Mexico' },
+  ],
+};
+
+const defaultEvt = {
+  preventDefault: sinon.spy(),
+  clipboardData: {
+    getData: sinon.spy(() => ' United States, China  , India, Canada, '),
+  },
+};
+
+describe('OnPasteSelect', () => {
+  let wrapper;
+  let props;
+  let evt;
+  let expected;
+  beforeEach(() => {
+    props = Object.assign({}, defaultProps);
+    wrapper = shallow(<OnPasteSelect {...props} />);
+    evt = Object.assign({}, defaultEvt);
+  });
+
+  it('renders the supplied selectWrap component', () => {
+    const select = wrapper.find(Select);
+    expect(select).to.have.lengthOf(1);
+  });
+
+  it('renders custom selectWrap components', () => {
+    props.selectWrap = Creatable;
+    wrapper = shallow(<OnPasteSelect {...props} />);
+    expect(wrapper.find(Creatable)).to.have.lengthOf(1);
+    props.selectWrap = VirtualizedSelect;
+    wrapper = shallow(<OnPasteSelect {...props} />);
+    expect(wrapper.find(VirtualizedSelect)).to.have.lengthOf(1);
+  });
+
+  describe('onPaste', () => {
+    it('calls onChange with pasted values', () => {
+      wrapper.instance().onPaste(evt);
+      expected = props.options.slice(0, 4);
+      expect(props.onChange.calledWith(expected)).to.be.true;
+      expect(evt.preventDefault.called).to.be.true;
+      expect(props.isValidNewOption.callCount).to.equal(5);
+    });
+
+    it('calls onChange without any duplicate values and adds new values', () => {
+      evt.clipboardData.getData = sinon.spy(() =>
+        'China, China, China, China, Mexico, Mexico, Chi na, Mexico, ',
+      );
+      expected = [
+        props.options[1],
+        props.options[6],
+        { label: 'Chi na', value: 'Chi na' },
+      ];
+      wrapper.instance().onPaste(evt);
+      expect(props.onChange.calledWith(expected)).to.be.true;
+      expect(evt.preventDefault.called).to.be.true;
+      expect(props.isValidNewOption.callCount).to.equal(9);
+      expect(props.options[0].value).to.equal(expected[2].value);
+      props.options.splice(0, 1);
+    });
+
+    it('calls onChange with currently selected values and new values', () => {
+      props.value = ['United States', 'Canada', 'Mexico'];
+      evt.clipboardData.getData = sinon.spy(() =>
+        'United States, Canada, Japan, India',
+      );
+      wrapper = shallow(<OnPasteSelect {...props} />);
+      expected = [
+        props.options[0],
+        props.options[3],
+        props.options[6],
+        props.options[5],
+        props.options[2],
+      ];
+      wrapper.instance().onPaste(evt);
+      expect(props.onChange.calledWith(expected)).to.be.true;
+      expect(evt.preventDefault.called).to.be.true;
+      expect(props.isValidNewOption.callCount).to.equal(11);
+    });
+  });
+});