61 lines
1.9 KiB
TypeScript
61 lines
1.9 KiB
TypeScript
import { afterEach, describe, expect, it, vi } from 'vitest'
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import { render, screen } from '@testing-library/react'
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const nativeRegExpDescriptor = Object.getOwnPropertyDescriptor(globalThis, 'RegExp')
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const NativeRegExp = RegExp
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function setRegExpConstructor(value: RegExpConstructor) {
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Object.defineProperty(globalThis, 'RegExp', {
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configurable: true,
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writable: true,
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value,
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})
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}
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function restoreRegExpConstructor() {
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if (nativeRegExpDescriptor) {
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Object.defineProperty(globalThis, 'RegExp', nativeRegExpDescriptor)
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}
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}
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function rejectsLegacyWebKitRegex(source: string, flags?: string): boolean {
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if (flags?.includes('d')) return true
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if (flags?.includes('v')) return true
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return source.includes('(?<')
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}
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function installLegacyWebKitRegExp() {
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const LegacyWebKitRegExp = function (pattern?: string | RegExp, flags?: string) {
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const source = pattern instanceof NativeRegExp ? pattern.source : String(pattern ?? '')
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if (rejectsLegacyWebKitRegex(source, flags)) {
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throw new SyntaxError('Invalid regular expression: invalid group specifier name')
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}
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return new NativeRegExp(pattern, flags)
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} as RegExpConstructor
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Object.setPrototypeOf(LegacyWebKitRegExp, NativeRegExp)
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LegacyWebKitRegExp.prototype = NativeRegExp.prototype
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setRegExpConstructor(LegacyWebKitRegExp)
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}
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afterEach(() => {
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restoreRegExpConstructor()
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vi.resetModules()
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})
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describe('MarkdownContent WebKit regex fallback', () => {
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it('renders AI code fences without syntax highlighting when modern regex features are unavailable', async () => {
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installLegacyWebKitRegExp()
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vi.resetModules()
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const { MarkdownContent } = await import('./MarkdownContent')
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expect(() => {
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render(<MarkdownContent content={'```ts\nconst prompt = "(?<name>.*)"\n```'} />)
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}).not.toThrow()
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expect(screen.getByText('const prompt = "(?<name>.*)"')).toBeInTheDocument()
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})
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})
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