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20 changes: 19 additions & 1 deletion
20
code/builders/builder-webpack5/src/presets/custom-webpack-preset.ts
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71 changes: 71 additions & 0 deletions
71
code/core/src/preview-api/modules/store/csf/beforeAll.test.ts
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Original file line number | Diff line number | Diff line change |
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import { beforeEach, describe, expect, it } from 'vitest'; | ||
import { composeBeforeAllHooks } from './beforeAll'; | ||
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const calls: string[] = []; | ||
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beforeEach(() => { | ||
calls.length = 0; | ||
}); | ||
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const basicHook = (label: string) => () => { | ||
calls.push(label); | ||
}; | ||
const asyncHook = (label: string, delay: number) => async () => { | ||
await new Promise((resolve) => setTimeout(resolve, delay)); | ||
calls.push(label); | ||
}; | ||
const cleanupHook = (label: string) => () => { | ||
calls.push(label); | ||
return () => { | ||
calls.push(label + ' cleanup'); | ||
}; | ||
}; | ||
const asyncCleanupHook = (label: string, delay: number) => () => { | ||
calls.push(label); | ||
return async () => { | ||
await new Promise((resolve) => setTimeout(resolve, delay)); | ||
calls.push(label + ' cleanup'); | ||
}; | ||
}; | ||
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describe('composeBeforeAllHooks', () => { | ||
it('should return a composed hook function', async () => { | ||
await composeBeforeAllHooks([basicHook('one'), basicHook('two'), basicHook('three')])(); | ||
expect(calls).toEqual(['one', 'two', 'three']); | ||
}); | ||
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it('should execute cleanups in reverse order', async () => { | ||
const cleanup = await composeBeforeAllHooks([ | ||
cleanupHook('one'), | ||
cleanupHook('two'), | ||
cleanupHook('three'), | ||
])(); | ||
expect(calls).toEqual(['one', 'two', 'three']); | ||
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await cleanup?.(); | ||
expect(calls).toEqual(['one', 'two', 'three', 'three cleanup', 'two cleanup', 'one cleanup']); | ||
}); | ||
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it('should execute async hooks in sequence', async () => { | ||
await composeBeforeAllHooks([ | ||
asyncHook('one', 10), | ||
asyncHook('two', 100), | ||
asyncHook('three', 10), | ||
])(); | ||
expect(calls).toEqual(['one', 'two', 'three']); | ||
}); | ||
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it('should execute async cleanups in reverse order', async () => { | ||
const hooks = [ | ||
asyncCleanupHook('one', 10), | ||
asyncCleanupHook('two', 100), | ||
asyncCleanupHook('three', 10), | ||
]; | ||
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const cleanup = await composeBeforeAllHooks(hooks)(); | ||
expect(calls).toEqual(['one', 'two', 'three']); | ||
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await cleanup?.(); | ||
expect(calls).toEqual(['one', 'two', 'three', 'three cleanup', 'two cleanup', 'one cleanup']); | ||
}); | ||
}); |
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Original file line number | Diff line number | Diff line change |
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import { type BeforeAll, type CleanupCallback } from '@storybook/csf'; | ||
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// Execute all the hooks in sequence, and return a function that will execute cleanups in reverse order | ||
export const composeBeforeAllHooks = (hooks: BeforeAll[]): BeforeAll => { | ||
return async () => { | ||
const cleanups: CleanupCallback[] = []; | ||
for (const hook of hooks) { | ||
const cleanup = await hook(); | ||
if (cleanup) cleanups.unshift(cleanup); | ||
} | ||
return async () => { | ||
for (const cleanup of cleanups) { | ||
await cleanup(); | ||
} | ||
}; | ||
}; | ||
}; |
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