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Copy pathcacheControl.massive-scaling.test.ts
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65 lines (57 loc) · 2.92 KB
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import { describe, expect, it } from 'vitest';
import { buildCacheControlHeader } from './cacheControl';
describe('buildCacheControlHeader - Massive Data Sets & Extreme High Bounds Scaling', () => {
it('1. handles extreme high bound values for secondsToMidnight without formatting corruption', () => {
// Testing with maximum safe integer and an arbitrarily large number
const maxSafe = Number.MAX_SAFE_INTEGER;
const extremeBound = 999999999999999;
expect(buildCacheControlHeader({ secondsToMidnight: maxSafe })).toBe(
`public, s-maxage=${maxSafe}, stale-while-revalidate=86400`
);
expect(buildCacheControlHeader({ secondsToMidnight: extremeBound })).toBe(
`public, s-maxage=${extremeBound}, stale-while-revalidate=86400`
);
});
it('2. processes negative numerical bounds for secondsToMidnight correctly', () => {
// Checking negative values to ensure string interpolation holds correctly
expect(buildCacheControlHeader({ secondsToMidnight: -1 })).toBe(
'public, s-maxage=-1, stale-while-revalidate=86400'
);
expect(buildCacheControlHeader({ secondsToMidnight: -86400 })).toBe(
'public, s-maxage=-86400, stale-while-revalidate=86400'
);
});
it('3. handles exact zero bounds properly instead of falling back to default', () => {
// 0 is falsy, so we ensure the function distinguishes \`0\` from \`undefined\`
expect(buildCacheControlHeader({ secondsToMidnight: 0 })).toBe(
'public, s-maxage=0, stale-while-revalidate=86400'
);
});
it('4. processes JavaScript numeric edge cases like Infinity and NaN without crashing', () => {
// Even if NaN/Infinity aren't standard cache values, the backend utility
// shouldn't crash when massive calculations yield floating point edge cases.
expect(buildCacheControlHeader({ secondsToMidnight: Infinity })).toBe(
'public, s-maxage=Infinity, stale-while-revalidate=86400'
);
expect(buildCacheControlHeader({ secondsToMidnight: NaN })).toBe(
'public, s-maxage=NaN, stale-while-revalidate=86400'
);
});
it('5. executes massive scale iterations within strict performance margins', () => {
// Emulate a high-volume caching scenario where thousands of requests are processed
const iterations = 100000;
const startCalc = performance.now();
for (let i = 0; i < iterations; i++) {
// Rotate through different variations to prevent V8 from optimizing away a single pure call
buildCacheControlHeader({ secondsToMidnight: i });
buildCacheControlHeader({ bypass: i % 2 === 0 });
buildCacheControlHeader({ isHistoricalYear: i % 3 === 0 });
}
const endCalc = performance.now();
const elapsedCalc = endCalc - startCalc;
// Direct performance calculation should be incredibly fast
// We allow a generous 500ms limit, though it usually takes <50ms
const calcLimit = process.env.CI ? 2000 : 500;
expect(elapsedCalc).toBeLessThan(calcLimit);
});
});