import { describe, it, expect } from 'vitest';
// Test async pattern detection (isolated from browser)
const ASYNC_PATTERNS = [
/\basync\b/,
/\bawait\b/,
/\.then\s*\(/,
/\.catch\s*\(/,
/\.finally\s*\(/,
/\bfetch\s*\(/,
/new\s+Promise\b/,
/Promise\.(all|race|any|allSettled|resolve|reject)\b/,
];
function hasAsyncPatterns(script: string): { hasAsync: boolean; patterns: string[] } {
const matched = ASYNC_PATTERNS.filter((p) => p.test(script));
return {
hasAsync: matched.length > 0,
patterns: matched.map((p) => p.source),
};
}
describe('Async Pattern Detection', () => {
it('should detect async keyword', () => {
const result = hasAsyncPatterns('async function foo() {}');
expect(result.hasAsync).toBe(true);
expect(result.patterns).toContain('\\basync\\b');
});
it('should detect await keyword', () => {
const result = hasAsyncPatterns('const x = await fetch()');
expect(result.hasAsync).toBe(true);
expect(result.patterns).toContain('\\bawait\\b');
});
it('should detect .then()', () => {
const result = hasAsyncPatterns('promise.then(x => x)');
expect(result.hasAsync).toBe(true);
expect(result.patterns).toContain('\\.then\\s*\\(');
});
it('should detect .catch()', () => {
const result = hasAsyncPatterns('promise.catch(e => console.log(e))');
expect(result.hasAsync).toBe(true);
});
it('should detect fetch()', () => {
const result = hasAsyncPatterns('fetch("/api/data")');
expect(result.hasAsync).toBe(true);
});
it('should detect new Promise', () => {
const result = hasAsyncPatterns('new Promise((resolve) => resolve())');
expect(result.hasAsync).toBe(true);
});
it('should detect Promise.all', () => {
const result = hasAsyncPatterns('Promise.all([p1, p2])');
expect(result.hasAsync).toBe(true);
});
it('should detect Promise.race', () => {
const result = hasAsyncPatterns('Promise.race([p1, p2])');
expect(result.hasAsync).toBe(true);
});
it('should NOT detect sync code', () => {
const syncScripts = [
'window.__NUXT__',
'document.title',
'const x = 1 + 2',
'function foo() { return 42; }',
'(() => { return window.data; })()',
];
for (const script of syncScripts) {
const result = hasAsyncPatterns(script);
expect(result.hasAsync).toBe(false);
}
});
it('should detect multiple async patterns', () => {
const result = hasAsyncPatterns('async () => { await fetch("/api").then(r => r.json()) }');
expect(result.hasAsync).toBe(true);
expect(result.patterns.length).toBeGreaterThan(1);
});
});
