storybook-addon-relay

A Storybook add-on to write stories for Relay components.

github_demo.webm

Installation

Install the @imchhh/storybook-addon-relay package using the package manager of your choice:

yarn add -D @imchhh/storybook-addon-relay

Add @imchhh/storybook-addon-relay to the addons list in your .storybook/main.c?(j|t)s file:

const config: StorybookConfig = {
  addons: [
    // ...
    '@imchhh/storybook-addon-relay',
  ],
};

Usage

Add a relay field to your story's parameters.

export const Default = {
  parameters: {
    relay: {
      query: graphql`...`,
      getReferenceEntry: (data) => ['data', data.node],
      variables: {},
      mockResolvers: {},
    },
  },
};

• query: A GraphQLTaggedNode returned by the Relay's graphql template literal. You should pass the query operation that uses the @relay_test_operation directive.
• getReferenceEntry: A function that returns an entry to be added to the story's args. It takes the result of the useLazyLoadQuery hook with the query passed as a parameter and returns an entry to be added to the story's args.
• variables: Optional. Variables to pass to the query.
• mockResolvers: Optional. A mock resolver object passed to the relay-test-utils' MockPayloadGenerator.generate function.

Here is a minimal example:

// UserAvatar.tsx
export const UserAvatar = (props) => {
  const data = useFragment(
    graphql`
      fragment UserAvatar on User {
        profileImageUrl
      }
    `,
    props.user,
  );

  return <img src={data.profileImageUrl} alt="" />;
};

// UserAvatar.stories.tsx
import { StoryObj } from '@storybook/react';
import { graphql } from 'react-relay';
import { UserAvatar } from './UserAvatar';

export default {
  component: UserAvatar,
};

export const Default: StoryObj = {
  parameters: {
    relay: {
      query: graphql`
        query UserAvatarStoryQuery @relay_test_operation {
          node(id: "test-id") {
            ... on User {
              ...UserAvatar
            }
          }
        }
      `,
      getReferenceEntry: queryResult => ['user', queryResult.node],
      mockResolvers: {
        User: () => ({
          profileImageUrl: 'https://source.unsplash.com/random/400x400',
        }),
      },
    },
  },
};

TypeScript (Optional)

If you are using TypeScript 4.9 or later, you can use the WithRelayParameters interface and the satisfies keyword to get type-safe:

// UserAvatar.stories.tsx
import { WithRelayParameters } from '@imchhh/storybook-addon-relay';
import { StoryObj } from '@storybook/react';
import { graphql } from 'react-relay';
import { UserAvatarStoryQuery } from '~/path/of/relay/artifacts';
import { UserAvatar } from './UserAvatar';

export default {
  component: UserAvatar,
};

export const Default: StoryObj = {
  parameters: {
    relay: {
      query: graphql`
        query UserAvatarStoryQuery @relay_test_operation {
          node(id: "test-id") {
            ... on User {
              ...UserAvatar
            }
          }
        }
      `,
      // Now `queryResult` is typed!
      getReferenceEntry: queryResult => ['user', queryResult.node],
      mockResolvers: {
        User: () => ({
          profileImageUrl: 'https://source.unsplash.com/random/400x400',
        }),
      },
    } satisfies WithRelayParameters<UserAvatarStoryQuery>,
  },
};

And you can pass the Resolvers type, which generated via GraphQL Code Generator, as the second type parameter to WithRelayParameters.

// UserAvatar.stories.tsx
import { WithRelayParameters } from '@imchhh/storybook-addon-relay';
import { StoryObj } from '@storybook/react';
import { graphql } from 'react-relay';
import { Resolvers } from '~/path/of/codegen/generated';
import { UserAvatarStoryQuery } from '~/path/of/relay/artifacts';
import { UserAvatar } from './UserAvatar';

export default {
  component: UserAvatar,
};

export const Default: StoryObj = {
  parameters: {
    relay: {
      query: graphql`
        query UserAvatarStoryQuery @relay_test_operation {
          node(id: "test-id") {
            ... on User {
              ...UserAvatar
            }
          }
        }
      `,
      getReferenceEntry: queryResult => ['user', queryResult.node],
      // Now `mockResolvers` is typed!
      mockResolvers: {
        User: () => ({
          profileImageUrl: 'https://source.unsplash.com/random/400x400',
        }),
      },
    } satisfies WithRelayParameters<UserAvatarStoryQuery, Resolvers>,
  },
};

These are totally optional, so feel free to skip them

Contribute

I don't have any plans to write or set up a contribution guide. If this library doesn't solve your problem or isn't sufficient, please create an issue and describe your situation or suggestion. I would appreciate it very much.

License

MIT