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How to use enhancerTwo method in storybook-root

Best JavaScript code snippet using storybook-root
prepareStory.test.ts
Source:prepareStory.test.ts
1import global from 'global';2import { addons, HooksContext } from '@storybook/addons';3import type {4  AnyFramework,5  ArgsEnhancer,6  SBObjectType,7  SBScalarType,8  StoryContext,9} from '@storybook/csf';10import { NO_TARGET_NAME } from '../args';11import { prepareStory } from './prepareStory';12jest.mock('global', () => ({13  ...(jest.requireActual('global') as any),14  FEATURES: {15    breakingChangesV7: true,16  },17}));18const id = 'id';19const name = 'name';20const title = 'title';21const render = (args: any) => {};22const stringType: SBScalarType = { name: 'string' };23const numberType: SBScalarType = { name: 'number' };24const booleanType: SBScalarType = { name: 'boolean' };25const complexType: SBObjectType = {26  name: 'object',27  value: {28    complex: {29      name: 'object',30      value: {31        object: {32          name: 'array',33          value: { name: 'string' },34        },35      },36    },37  },38};39beforeEach(() => {40  global.FEATURES = { breakingChangesV7: true };41});42describe('prepareStory', () => {43  describe('parameters', () => {44    it('are combined in the right order', () => {45      const { parameters } = prepareStory(46        { id, name, parameters: { a: 'story', nested: { z: 'story' } } },47        {48          id,49          title,50          parameters: {51            a: { name: 'component' },52            b: { name: 'component' },53            nested: { z: { name: 'component' }, y: { name: 'component' } },54          },55        },56        {57          render,58          parameters: {59            a: { name: 'global' },60            b: { name: 'global' },61            c: { name: 'global' },62            nested: { z: { name: 'global' }, x: { name: 'global' } },63          },64        }65      );66      expect(parameters).toEqual({67        __isArgsStory: true,68        a: 'story',69        b: { name: 'component' },70        c: { name: 'global' },71        nested: { z: 'story', y: { name: 'component' }, x: { name: 'global' } },72      });73    });74    it('sets a value even if metas do not have parameters', () => {75      const { parameters } = prepareStory({ id, name }, { id, title }, { render });76      expect(parameters).toEqual({ __isArgsStory: true });77    });78    it('does not set `__isArgsStory` if `passArgsFirst` is disabled', () => {79      const { parameters } = prepareStory(80        { id, name, parameters: { passArgsFirst: false } },81        { id, title },82        { render }83      );84      expect(parameters).toEqual({ passArgsFirst: false, __isArgsStory: false });85    });86    it('does not set `__isArgsStory` if `render` does not take args', () => {87      const { parameters } = prepareStory({ id, name }, { id, title }, { render: () => {} });88      expect(parameters).toEqual({ __isArgsStory: false });89    });90  });91  describe('args/initialArgs', () => {92    it('are combined in the right order', () => {93      const { initialArgs } = prepareStory(94        { id, name, args: { a: 'story', nested: { z: 'story' } } },95        {96          id,97          title,98          args: {99            a: 'component',100            b: 'component',101            nested: { z: 'component', y: 'component' },102          },103        },104        {105          render,106          args: {107            a: 'global',108            b: 'global',109            c: 'global',110            nested: { z: 'global', x: 'global' },111          },112        }113      );114      expect(initialArgs).toEqual({115        a: 'story',116        b: 'component',117        c: 'global',118        nested: { z: 'story' },119      });120    });121    it('can be overriden by `undefined`', () => {122      const { initialArgs } = prepareStory(123        { id, name, args: { a: undefined } },124        { id, title, args: { a: 'component' } },125        { render }126      );127      expect(initialArgs).toEqual({ a: undefined });128    });129    it('sets a value even if metas do not have args', () => {130      const { initialArgs } = prepareStory({ id, name }, { id, title }, { render });131      expect(initialArgs).toEqual({});132    });133    it('are initialized to argTypes[x].defaultValue if unset', () => {134      const { initialArgs } = prepareStory(135        {136          id,137          name,138          args: {139            arg2: 3,140            arg4: 'foo',141            arg7: false,142          },143          argTypes: {144            arg1: { name: 'arg1', type: stringType, defaultValue: 'arg1' },145            arg2: { name: 'arg2', type: numberType, defaultValue: 2 },146            arg3: {147              name: 'arg3',148              type: complexType,149              defaultValue: { complex: { object: ['type'] } },150            },151            arg4: { name: 'arg4', type: stringType },152            arg5: { name: 'arg5', type: stringType },153            arg6: { name: 'arg6', type: numberType, defaultValue: 0 }, // See https://github.com/storybookjs/storybook/issues/12767 }154          },155        },156        { id, title },157        { render: () => {} }158      );159      expect(initialArgs).toEqual({160        arg1: 'arg1',161        arg2: 3,162        arg3: { complex: { object: ['type'] } },163        arg4: 'foo',164        arg6: 0,165        arg7: false,166      });167    });168    describe('argsEnhancers', () => {169      it('are applied in the right order', () => {170        const run = [];171        const enhancerOne: ArgsEnhancer<AnyFramework> = () => {172          run.push(1);173          return {};174        };175        const enhancerTwo: ArgsEnhancer<AnyFramework> = () => {176          run.push(2);177          return {};178        };179        prepareStory(180          { id, name },181          { id, title },182          { render, argsEnhancers: [enhancerOne, enhancerTwo] }183        );184        expect(run).toEqual([1, 2]);185      });186      it('allow you to add args', () => {187        const enhancer = jest.fn(() => ({ c: 'd' }));188        const { initialArgs } = prepareStory(189          { id, name, args: { a: 'b' } },190          { id, title },191          { render, argsEnhancers: [enhancer] }192        );193        expect(enhancer).toHaveBeenCalledWith(expect.objectContaining({ initialArgs: { a: 'b' } }));194        expect(initialArgs).toEqual({ a: 'b', c: 'd' });195      });196      it('passes result of earlier enhancers into subsequent ones, and composes their output', () => {197        const enhancerOne = jest.fn(() => ({ b: 'B' }));198        const enhancerTwo = jest.fn(({ initialArgs }) =>199          Object.entries(initialArgs).reduce(200            (acc, [key, val]) => ({ ...acc, [key]: `enhanced ${val}` }),201            {}202          )203        );204        const enhancerThree = jest.fn(() => ({ c: 'C' }));205        const { initialArgs } = prepareStory(206          { id, name, args: { a: 'A' } },207          { id, title },208          { render, argsEnhancers: [enhancerOne, enhancerTwo, enhancerThree] }209        );210        expect(enhancerOne).toHaveBeenCalledWith(211          expect.objectContaining({ initialArgs: { a: 'A' } })212        );213        expect(enhancerTwo).toHaveBeenCalledWith(214          expect.objectContaining({ initialArgs: { a: 'A', b: 'B' } })215        );216        expect(enhancerThree).toHaveBeenCalledWith(217          expect.objectContaining({ initialArgs: { a: 'enhanced A', b: 'enhanced B' } })218        );219        expect(initialArgs).toEqual({220          a: 'enhanced A',221          b: 'enhanced B',222          c: 'C',223        });224      });225    });226  });227  describe('argTypes', () => {228    it('are combined in the right order', () => {229      const { argTypes } = prepareStory(230        {231          id,232          name,233          argTypes: {234            a: { name: 'a-story', type: booleanType },235            nested: { name: 'nested', type: booleanType, a: 'story' },236          },237        },238        {239          id,240          title,241          argTypes: {242            a: { name: 'a-component', type: stringType },243            b: { name: 'b-component', type: stringType },244            nested: { name: 'nested', type: booleanType, a: 'component', b: 'component' },245          },246        },247        {248          render,249          argTypes: {250            a: { name: 'a-global', type: numberType },251            b: { name: 'b-global', type: numberType },252            c: { name: 'c-global', type: numberType },253            nested: { name: 'nested', type: booleanType, a: 'global', b: 'global', c: 'global' },254          },255        }256      );257      expect(argTypes).toEqual({258        a: { name: 'a-story', type: booleanType },259        b: { name: 'b-component', type: stringType },260        c: { name: 'c-global', type: numberType },261        nested: { name: 'nested', type: booleanType, a: 'story', b: 'component', c: 'global' },262      });263    });264    describe('argTypesEnhancers', () => {265      it('allows you to alter argTypes when stories are added', () => {266        const enhancer = jest.fn((context) => ({ ...context.argTypes, c: { name: 'd' } }));267        const { argTypes } = prepareStory(268          { id, name, argTypes: { a: { name: 'b' } } },269          { id, title },270          { render, argTypesEnhancers: [enhancer] }271        );272        expect(enhancer).toHaveBeenCalledWith(273          expect.objectContaining({ argTypes: { a: { name: 'b' } } })274        );275        expect(argTypes).toEqual({ a: { name: 'b' }, c: { name: 'd' } });276      });277      it('does not merge argType enhancer results', () => {278        const enhancer = jest.fn(() => ({ c: { name: 'd' } }));279        const { argTypes } = prepareStory(280          { id, name, argTypes: { a: { name: 'b' } } },281          { id, title },282          { render, argTypesEnhancers: [enhancer] }283        );284        expect(enhancer).toHaveBeenCalledWith(285          expect.objectContaining({ argTypes: { a: { name: 'b' } } })286        );287        expect(argTypes).toEqual({ c: { name: 'd' } });288      });289      it('recursively passes argTypes to successive enhancers', () => {290        const firstEnhancer = jest.fn((context) => ({ ...context.argTypes, c: { name: 'd' } }));291        const secondEnhancer = jest.fn((context) => ({ ...context.argTypes, e: { name: 'f' } }));292        const { argTypes } = prepareStory(293          { id, name, argTypes: { a: { name: 'b' } } },294          { id, title },295          { render, argTypesEnhancers: [firstEnhancer, secondEnhancer] }296        );297        expect(firstEnhancer).toHaveBeenCalledWith(298          expect.objectContaining({ argTypes: { a: { name: 'b' } } })299        );300        expect(secondEnhancer).toHaveBeenCalledWith(301          expect.objectContaining({ argTypes: { a: { name: 'b' }, c: { name: 'd' } } })302        );303        expect(argTypes).toEqual({ a: { name: 'b' }, c: { name: 'd' }, e: { name: 'f' } });304      });305    });306  });307  describe('applyLoaders', () => {308    it('awaits the result of a loader', async () => {309      const loader = jest.fn(async () => new Promise((r) => setTimeout(() => r({ foo: 7 }), 100)));310      const { applyLoaders } = prepareStory(311        { id, name, loaders: [loader] },312        { id, title },313        { render }314      );315      const storyContext = { context: 'value' } as any;316      const loadedContext = await applyLoaders(storyContext);317      expect(loader).toHaveBeenCalledWith(storyContext);318      expect(loadedContext).toEqual({319        context: 'value',320        loaded: { foo: 7 },321      });322    });323    it('loaders are composed in the right order', async () => {324      const globalLoader = async () => ({ foo: 1, bar: 1, baz: 1 });325      const componentLoader = async () => ({ foo: 3, bar: 3 });326      const storyLoader = async () => ({ foo: 5 });327      const { applyLoaders } = prepareStory(328        { id, name, loaders: [storyLoader] },329        { id, title, loaders: [componentLoader] },330        { render, loaders: [globalLoader] }331      );332      const storyContext = { context: 'value' } as any;333      const loadedContext = await applyLoaders(storyContext);334      expect(loadedContext).toEqual({335        context: 'value',336        loaded: { foo: 5, bar: 3, baz: 1 },337      });338    });339    it('later loaders override earlier loaders', async () => {340      const loaders = [341        async () => new Promise((r) => setTimeout(() => r({ foo: 7 }), 100)),342        async () => new Promise((r) => setTimeout(() => r({ foo: 3 }), 50)),343      ];344      const { applyLoaders } = prepareStory({ id, name, loaders }, { id, title }, { render });345      const storyContext = { context: 'value' } as any;346      const loadedContext = await applyLoaders(storyContext);347      expect(loadedContext).toEqual({348        context: 'value',349        loaded: { foo: 3 },350      });351    });352  });353  describe('undecoratedStoryFn', () => {354    it('args are mapped by argTypes[x].mapping', () => {355      const renderMock = jest.fn();356      const story = prepareStory(357        {358          id,359          name,360          argTypes: {361            one: { name: 'one', type: { name: 'string' }, mapping: { 1: 'mapped' } },362            two: { name: 'two', type: { name: 'string' }, mapping: { 1: 'no match' } },363          },364          args: { one: 1, two: 2, three: 3 },365        },366        { id, title },367        { render: renderMock }368      );369      const context = { args: story.initialArgs, ...story };370      story.undecoratedStoryFn(context as any);371      expect(renderMock).toHaveBeenCalledWith(372        { one: 'mapped', two: 2, three: 3 },373        expect.objectContaining({ args: { one: 'mapped', two: 2, three: 3 } })374      );375    });376    it('passes args as the first argument to the story if `parameters.passArgsFirst` is true', () => {377      const renderMock = jest.fn();378      const firstStory = prepareStory(379        { id, name, args: { a: 1 }, parameters: { passArgsFirst: true } },380        { id, title },381        { render: renderMock }382      );383      firstStory.undecoratedStoryFn({ args: firstStory.initialArgs, ...firstStory } as any);384      expect(renderMock).toHaveBeenCalledWith(385        { a: 1 },386        expect.objectContaining({ args: { a: 1 } })387      );388      const secondStory = prepareStory(389        { id, name, args: { a: 1 }, parameters: { passArgsFirst: false } },390        { id, title },391        { render: renderMock }392      );393      secondStory.undecoratedStoryFn({ args: secondStory.initialArgs, ...secondStory } as any);394      expect(renderMock).toHaveBeenCalledWith(expect.objectContaining({ args: { a: 1 } }));395    });396  });397  describe('storyFn', () => {398    it('produces a story with inherited decorators applied', () => {399      const renderMock = jest.fn();400      const globalDecorator = jest.fn((s) => s());401      const componentDecorator = jest.fn((s) => s());402      const storyDecorator = jest.fn((s) => s());403      const story = prepareStory(404        {405          id,406          name,407          decorators: [storyDecorator],408        },409        { id, title, decorators: [componentDecorator] },410        { render: renderMock, decorators: [globalDecorator] }411      );412      addons.setChannel({ on: jest.fn(), removeListener: jest.fn() } as any);413      const hooks = new HooksContext();414      story.unboundStoryFn({ args: story.initialArgs, hooks, ...story } as any);415      expect(globalDecorator).toHaveBeenCalled();416      expect(componentDecorator).toHaveBeenCalled();417      expect(storyDecorator).toHaveBeenCalled();418      expect(renderMock).toHaveBeenCalled();419      hooks.clean();420    });421  });422  describe('with `FEATURES.argTypeTargetsV7`', () => {423    beforeEach(() => {424      global.FEATURES = { breakingChangesV7: true, argTypeTargetsV7: true };425    });426    it('filters out targeted args', () => {427      const renderMock = jest.fn();428      const firstStory = prepareStory(429        {430          id,431          name,432          args: { a: 1, b: 2 },433          argTypes: { b: { name: 'b', target: 'foo' } },434        },435        { id, title },436        { render: renderMock }437      );438      firstStory.unboundStoryFn({439        args: firstStory.initialArgs,440        hooks: new HooksContext(),441        ...firstStory,442      } as any);443      expect(renderMock).toHaveBeenCalledWith(444        { a: 1 },445        expect.objectContaining({ args: { a: 1 }, allArgs: { a: 1, b: 2 } })446      );447    });448    it('adds argsByTarget to context', () => {449      const renderMock = jest.fn();450      const firstStory = prepareStory(451        {452          id,453          name,454          args: { a: 1, b: 2 },455          argTypes: { b: { name: 'b', target: 'foo' } },456        },457        { id, title },458        { render: renderMock }459      );460      firstStory.unboundStoryFn({461        args: firstStory.initialArgs,462        hooks: new HooksContext(),463        ...firstStory,464      } as any);465      expect(renderMock).toHaveBeenCalledWith(466        { a: 1 },467        expect.objectContaining({ argsByTarget: { [NO_TARGET_NAME]: { a: 1 }, foo: { b: 2 } } })468      );469    });470    it('always sets args, even when all are targetted', () => {471      const renderMock = jest.fn();472      const firstStory = prepareStory(473        {474          id,475          name,476          args: { b: 2 },477          argTypes: { b: { name: 'b', target: 'foo' } },478        },479        { id, title },480        { render: renderMock }481      );482      firstStory.unboundStoryFn({483        args: firstStory.initialArgs,484        hooks: new HooksContext(),485        ...firstStory,486      } as any);487      expect(renderMock).toHaveBeenCalledWith(488        {},489        expect.objectContaining({ argsByTarget: { foo: { b: 2 } } })490      );491    });492    it('always sets args, even when none are set for the story', () => {493      const renderMock = jest.fn();494      const firstStory = prepareStory(495        {496          id,497          name,498        },499        { id, title },500        { render: renderMock }501      );502      firstStory.unboundStoryFn({503        args: firstStory.initialArgs,504        hooks: new HooksContext(),505        ...firstStory,506      } as any);507      expect(renderMock).toHaveBeenCalledWith({}, expect.objectContaining({ argsByTarget: {} }));508    });509  });510});511describe('playFunction', () => {512  it('awaits play if defined', async () => {513    const inner = jest.fn();514    const play = jest.fn(async () => {515      await new Promise((r) => setTimeout(r, 0)); // Ensure this puts an async boundary in516      inner();517    });518    const { playFunction } = prepareStory({ id, name, play }, { id, title }, { render });519    await playFunction({} as StoryContext<AnyFramework>);520    expect(play).toHaveBeenCalled();521    expect(inner).toHaveBeenCalled();522  });...
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