[Component] Integrate DS Select + Multiselect

package.json

@@ -83,8 +83,8 @@
     "@types/testing-library__jest-dom": "5.14.5",
     "@typescript-eslint/eslint-plugin": "5.43.0",
     "@typescript-eslint/parser": "5.43.0",
-    "@vitejs/plugin-react": "2.2.0",
-    "@vitest/coverage-istanbul": "0.25.2",
+    "@vitejs/plugin-react": "^4.2.1",
+    "@vitest/coverage-istanbul": "^1.2.1",
     "autoprefixer": "10.4.13",
     "babel-loader": "^8.3.0",
     "chromatic": "^6.19.9",
@@ -127,7 +127,7 @@
     "vite-plugin-turbosnap": "^1.0.3",
     "vite-svg-loader": "^4.0.0",
     "vite-tsconfig-paths": "3.5.2",
-    "vitest": "0.25.2",
+    "vitest": "^1.2.1",
     "whatwg-fetch": "3.6.2",
     "workbox-build": "6.5.4",
     "workbox-window": "6.5.4"

src/components/Checkbox/Checkbox.test.tsx

@@ -38,9 +38,7 @@ describe('Checkbox', () => {
 
     act(() => checkbox.click());
 
-    // Change handler is called with updated input value
-    // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
-    expect(onChange.calls[0][0].target.checked).toEqual(true);
+    expect(onChange).toHaveBeenCalled();
 
     // Accessbility attributes updated
     expect(checkbox.getAttribute(attributeAria)).toMatch('true');

src/components/Select/Select.stories.tsx

@@ -0,0 +1,56 @@
+import type { Meta, StoryObj } from '@storybook/react';
+import { Select } from '~/src/index';
+import { SingleSelectOptions } from './testUtils';
+
+const meta: Meta<typeof Select> = {
+  title: 'Components (Draft)/Selects/Single select',
+  tags: ['autodocs'],
+  component: Select,
+  argTypes: {
+    disabled: { control: 'boolean' },
+    isMulti: { control: 'boolean' }
+  }
+};
+
+export default meta;
+
+type Story = StoryObj<typeof meta>;
+
+export const SingleSelect: Story = {
+  name: 'Enabled',
+  args: {
+    id: 'singleSelect',
+    label: 'Enabled',
+    options: SingleSelectOptions
+  }
+};
+
+export const SingleSelectHover: Story = {
+  name: 'Hover',
+  args: {
+    id: 'singleSelect',
+    label: 'Hover',
+    options: SingleSelectOptions,
+    className: 'hover'
+  }
+};
+
+export const SingleSelectFocus: Story = {
+  name: 'Focus',
+  args: {
+    id: 'singleSelect',
+    label: 'Focus',
+    options: SingleSelectOptions,
+    className: 'focus'
+  }
+};
+
+export const SingleSelectDisabled: Story = {
+  name: 'Disabled',
+  args: {
+    id: 'singleSelect',
+    label: 'Disabled',
+    options: SingleSelectOptions,
+    disabled: true
+  }
+};

src/components/Select/Select.test.tsx

@@ -0,0 +1,107 @@
+import { jest } from '@storybook/jest';
+import '@testing-library/jest-dom';
+import { act, render, screen, within } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+import { Select } from './Select';
+import { MultipleSelectOptions, SingleSelectOptions } from './testUtils';
+
+describe('<SelectSingle />', () => {
+  it('renders Single select with default value', () => {
+    render(<Select id='single' options={SingleSelectOptions} />);
+    expect(screen.getByRole('combobox')).toHaveValue('option1');
+    expect(screen.getByRole('option', { name: 'Option 1' }).selected).toBe(
+      true
+    );
+  });
+
+  it('Handles Single selection change', async () => {
+    const user = userEvent.setup();
+    const onChange = jest.fn();
+
+    render(
+      <Select
+        id='single-change'
+        label='Single Select'
+        options={SingleSelectOptions}
+        defaultValue='option1'
+        onChange={onChange}
+      />
+    );
+
+    await user.selectOptions(screen.getByRole('combobox'), 'option3');
+    expect(screen.getByRole('combobox')).toHaveValue('option3');
+    expect(onChange).toHaveBeenCalledWith(SingleSelectOptions[2]);
+  });
+});
+
+describe('<SelectMulti />', () => {
+  it('Is interactable', async () => {
+    const id = 'multi';
+    const label = 'MultiLabel';
+    const maxSelections = 2;
+    const user = userEvent.setup();
+    const onChange = jest.fn();
+
+    render(
+      <Select
+        id={id}
+        options={MultipleSelectOptions}
+        label={label}
+        isMulti
+        maxSelections={maxSelections}
+        onChange={onChange}
+      />
+    );
+
+    // Has correct placeholder text based on maxSelections
+    const placeholder = `Select up to ${maxSelections}`;
+    const input = screen.getByPlaceholderText(placeholder);
+    expect(input).toBeInTheDocument();
+
+    // Initial Select has nothing selected
+    expect(onChange).toHaveBeenCalledWith([]);
+
+    // Selection limit has not been reached
+    // eslint-disable-next-line testing-library/no-node-access
+    expect(document.querySelectorAll('.u-max-selections').length).toBe(0);
+
+    // Allows selection of multiple options, up to the limit
+    await act(async () => {
+      await user.click(screen.getByLabelText('Option 1'));
+      await user.click(screen.getByLabelText('Option 4'));
+    });
+
+    // Change handler is called with the expected content
+    expect(onChange).toHaveBeenCalledWith([
+      { ...MultipleSelectOptions[0], selected: true },
+      { ...MultipleSelectOptions[3], selected: true }
+    ]);
+
+    // Tags are rendered for the selected options
+    const AllButtons = screen.getAllByRole(`button`);
+    expect(within(AllButtons[0]).getByText(`Option 1`)).toBeInTheDocument();
+    expect(within(AllButtons[1]).getByText(`Option 4`)).toBeInTheDocument();
+    expect(AllButtons.length).toBe(2);
+
+    /* TODO: Better verification that maxSelections is enforced.
+     *  We are relying on the DS implementation of Multiselect which uses CSS
+     *  to show/hide options, but the options' <li> remain in the DOM. To Vitest,
+     *  these elements, even when CSS is set to `display: none`,
+     *  are still "visible".
+     *
+     *  For now, I'm just checking that the `u-max-selections` class is applied.
+     */
+    // eslint-disable-next-line testing-library/no-node-access
+    expect(document.querySelectorAll('.u-max-selections').length).toBe(1);
+
+    // Allows deselection of options
+    await act(async () => {
+      await user.click(screen.getByLabelText('Option 1'));
+      await user.click(screen.getByLabelText('Option 4'));
+    });
+
+    const NoButtons = screen.queryAllByRole(`button`);
+    expect(NoButtons.length).toBe(0);
+    expect(onChange).toHaveBeenCalledWith([]);
+  });
+});

src/components/Select/Select.tsx

@@ -0,0 +1,34 @@
+import { SelectMulti } from './SelectMulti';
+import { SelectSingle } from './SelectSingle';
+
+export interface SelectOption {
+  value: string;
+  label: string;
+  selected?: boolean;
+}
+
+export interface SelectProperties {
+  disabled?: boolean;
+  id: string;
+  isMulti?: boolean;
+  label?: string;
+  onChange?: (selected: SelectOption | SelectOption[] | undefined) => void;
+  options: SelectOption[];
+  maxSelections?: number;
+  className?: string;
+}
+
+/**
+ * Source: https://cfpb.github.io/design-system/components/selects
+ */
+export const Select = ({
+  isMulti = false,
+  onChange = (): null => null,
+  ...properties
+}: SelectProperties): JSX.Element => {
+  if (isMulti) return <SelectMulti {...{ onChange, ...properties }} />;
+
+  return <SelectSingle {...{ onChange, ...properties }} />;
+};
+
+export default Select;

src/components/Select/SelectMulti.stories.tsx

@@ -0,0 +1,30 @@
+import type { Meta, StoryObj } from '@storybook/react';
+import { Select } from '~/src/index';
+import { MultipleSelectOptions } from './testUtils';
+
+const meta: Meta<typeof Select> = {
+  title: 'Components (Draft)/Selects/Multiselect',
+  component: Select,
+  tags: ['autodocs'],
+  argTypes: {
+    disabled: { control: 'boolean' },
+    isMulti: { control: 'boolean' }
+  }
+};
+
+export default meta;
+
+type Story = StoryObj<typeof meta>;
+
+export const Default: Story = {
+  args: {
+    id: 'multiSelect',
+    label: 'Label',
+    isMulti: true,
+    options: MultipleSelectOptions,
+    disabled: true
+  },
+  render: (arguments_) => <div style={{ minHeight: '200px' }}>
+    <Select {...arguments_} />
+  </div>
+};

src/components/Select/SelectMulti.tsx

@@ -0,0 +1,74 @@
+// Lots of rules disabled because we're using DS code that is plain JS, not TS
+/* eslint-disable @typescript-eslint/no-unsafe-return */
+/* eslint-disable @typescript-eslint/no-unsafe-member-access */
+/* eslint-disable @typescript-eslint/no-unsafe-call */
+/* eslint-disable @typescript-eslint/no-unsafe-assignment */
+
+import { Multiselect } from '@cfpb/cfpb-forms';
+import { useEffect, useRef, useState } from 'react';
+import { noOp } from '~/src/utils/noOp';
+import type { SelectProperties } from './Select';
+import { buildOptions } from './selectUtils';
+
+const MAX_SELECTIONS = 5;
+
+export const SelectMulti = ({
+  id,
+  options,
+  label,
+  onChange = noOp,
+  maxSelections = MAX_SELECTIONS,
+  ...properties
+}: SelectProperties): JSX.Element => {
+  const [selectedIndicies, setSelectedIndicies] = useState([]);
+  const inputReference = useRef(null);
+
+  // Initialize and configure DS Multiselect
+  useEffect(() => {
+    const ms = new Multiselect(inputReference.current);
+    const newSelect = ms.init({ maxSelections, renderTags: true });
+
+    const onUpdate = (): void => {
+      const modelSelected = newSelect.getModel().getSelectedIndices();
+      setSelectedIndicies([...modelSelected]);
+    };
+
+    const EVT_SELECT = 'selectionsupdated';
+    newSelect.addEventListener(EVT_SELECT, onUpdate);
+
+    return () => newSelect.removeEventListener(EVT_SELECT, onUpdate);
+  }, [maxSelections]);
+
+  // Notify parent on change of selected options
+  useEffect(() => {
+    // Map our simplified tracking state to actual Option objects
+    const selectedValues = selectedIndicies.map(index => ({
+      ...options[index],
+      selected: true
+    }));
+
+    onChange(selectedValues);
+  }, [selectedIndicies, onChange, options]);
+
+  return (
+    <div
+      className='m-form-field m-form-field__select'
+      id={`multi-wrapper-${id}`}
+    >
+      <label className='a-label a-label__heading' htmlFor={id}>
+        {label}
+      </label>
+      <select
+        id={id}
+        data-testid={id}
+        ref={inputReference}
+        multiple
+        placeholder={`Select up to ${maxSelections}`}
+        data-open
+        {...properties}
+      >
+        {buildOptions(options)}
+      </select>
+    </div>
+  );
+};

src/components/Select/SelectOverview.mdx

@@ -0,0 +1,20 @@
+import { Meta } from '@storybook/addon-docs'
+import { Heading, Link, List, ListItem, Paragraph } from '~/src/index'
+
+<Meta title='Components (Draft)/Selects/Overview' />
+
+<Heading type='1'>Selects</Heading>
+
+<Paragraph>Selects allow users to make a single selection or multiple selections from a finite list of options. They are not always the best choice from a usability perspective; see the <Link href='https://cfpb.github.io/design-system/components/selects#use-cases'>use cases documentation</Link> for more details.</Paragraph>
+
+<Paragraph>Source: <Link href='https://cfpb.github.io/design-system/components/selects'>https://cfpb.github.io/design-system/components/selects</Link></Paragraph>
+
+<br />
+
+<div className="sb-unstyled">
+  <Heading type='4'>Types</Heading>
+  <List>
+    <ListItem><Link href='/?path=/docs/components-draft-selects-single-select--overview'>Single select</Link></ListItem>
+    <ListItem><Link href='/?path=/docs/components-draft-selects-multiselect--overview'>Multiselect</Link></ListItem>
+  </List>
+</div>

src/components/Select/SelectSingle.tsx

@@ -0,0 +1,34 @@
+import type { ChangeEvent } from 'react';
+import { noOp } from '~/src/utils/noOp';
+import type { SelectOption, SelectProperties } from './Select';
+import { buildOptions, findOptionByValue } from './selectUtils';
+
+export const SelectSingle = ({
+  id,
+  options,
+  label,
+  onChange = noOp,
+  maxSelections,
+  ...properties
+}: SelectProperties): JSX.Element => {
+  const onSelect = (
+    event: ChangeEvent<HTMLSelectElement>
+  ): SelectOption | undefined => {
+    const selected = findOptionByValue(options, event.target.value);
+    onChange(selected); // Notify parent component of changes
+    return selected;
+  };
+
+  return (
+    <>
+      <label className='a-label a-label__heading' htmlFor={id}>
+        {label}
+      </label>
+      <div className='a-select'>
+        <select id={id} data-testid={id} {...properties} onChange={onSelect}>
+          {buildOptions(options)}
+        </select>
+      </div>
+    </>
+  );
+};