Storybook: [docs] PropTypes are not expanded in props table

[ajkl2533]

Describe the bug
When I import props enumeration from external file, those values are not expanded in prop types table. Custom defined prop types are not expanded no matter if it's imported from external file or defined in components file.

To Reproduce

Custom PropTypes
*prop-types.js*

import PropTypes from 'prop-types';

export const ButtonVariants = PropTypes.oneOf([
  'primary',
  'secondary',
  'tertiary',
]);

export const ButtonSizes = PropTypes.oneOf([
  'extrasmall',
  'small',
  'medium',
  'large',
]);

Button.jsx

import { ButtonVariants, ButtonSizes } from './prop-types';

...

Button.propTypes = {
  children: PropTypes.node.isRequired,
  variant: ButtonVariants,
  size: ButtonSizes,
  iconClass: PropTypes.string,
  onClick: PropTypes.func,
};

Button.defaultProps = {
  variant: 'primary',
  size: 'medium',
  iconClass: '',
};

Imported props values
*enums.js*

export const VARIANTS = {
  PRIMARY: 'primary',
  SECONDARY: 'secondary',
  TERTIARY: 'tertiary',
};

export const SIZES = {
  EXTRASMALL: 'extrasmall',
  SMALL: 'small',
  MEDIUM: 'medium',
  LARGE: 'large',
};

Button.jsx

import { VARIANTS, SIZES } from './enums';

...

Button.propTypes = {
  children: PropTypes.node.isRequired,
  variant: PropTypes.oneOf(Object.values(VARIANTS)),
  size: PropTypes.oneOf(Object.values(SIZES)),
  iconClass: PropTypes.string,
  onClick: PropTypes.func,
};

Button.defaultProps = {
  variant: VARIANTS.PRIMARY,
  size: SIZES.MEDIUM,
  iconClass: '',
};

Expected behavior
Props table should contain expanded props values

Screenshots
Custom PropTypes

Imported props values

System:

  System:
    OS: macOS 10.15.3
    CPU: (12) x64 Intel(R) Core(TM) i7-8750H CPU @ 2.20GHz
  Binaries:
    Node: 12.13.1 - ~/.nvm/versions/node/v12.13.1/bin/node
    Yarn: 1.22.0 - /usr/local/bin/yarn
    npm: 6.12.1 - ~/.nvm/versions/node/v12.13.1/bin/npm
  Browsers:
    Chrome: 80.0.3987.132
    Safari: 13.0.5
  npmPackages:
    @storybook/addon-actions: ^5.3.17 => 5.3.17
    @storybook/addon-docs: ^5.3.17 => 5.3.17
    @storybook/addon-knobs: ^5.3.17 => 5.3.17
    @storybook/addon-storyshots: ^5.3.17 => 5.3.17
    @storybook/addon-storyshots-puppeteer: ^5.3.17 => 5.3.17
    @storybook/addons: ^5.3.17 => 5.3.17
    @storybook/react: ^5.3.17 => 5.3.17
    @storybook/theming: ^5.3.17 => 5.3.17

[shilman]

I think this is due to https://github.com/reactjs/react-docgen/pull/352

Please upvote the PR and issue!

[stale[bot]]

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[stale[bot]]

Hey there, it's me again! I am going close this issue to help our maintainers focus on the current development roadmap instead. If the issue mentioned is still a concern, please open a new ticket and mention this old one. Cheers and thanks for using Storybook!