wehub-resource-sync
b4fbd6fe9f
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69 lines
2.4 KiB
JavaScript
69 lines
2.4 KiB
JavaScript
import test from 'node:test';
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import assert from 'node:assert/strict';
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import { createOutboundIdTracker } from './outbound_ids.js';
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test('remembers and recognises an outbound id', () => {
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const tracker = createOutboundIdTracker();
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tracker.remember('msg-1');
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assert.equal(tracker.has('msg-1'), true);
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assert.equal(tracker.has('msg-2'), false);
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});
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test('ignores empty / falsy ids', () => {
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const tracker = createOutboundIdTracker();
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tracker.remember(undefined);
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tracker.remember('');
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tracker.remember(null);
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assert.equal(tracker.size(), 0);
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assert.equal(tracker.has(''), false);
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assert.equal(tracker.has(undefined), false);
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});
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test('evicts oldest entry once the cap is exceeded', () => {
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const tracker = createOutboundIdTracker(3);
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tracker.remember('a');
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tracker.remember('b');
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tracker.remember('c');
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tracker.remember('d'); // cap=3 → 'a' should be evicted
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assert.equal(tracker.has('a'), false);
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assert.equal(tracker.has('b'), true);
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assert.equal(tracker.has('c'), true);
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assert.equal(tracker.has('d'), true);
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assert.equal(tracker.size(), 3);
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});
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test('cap holds across many inserts (bounded memory)', () => {
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const tracker = createOutboundIdTracker(8);
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for (let i = 0; i < 100; i += 1) {
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tracker.remember(`id-${i}`);
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}
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assert.equal(tracker.size(), 8);
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// Oldest (id-0..id-91) should be gone, latest 8 retained.
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assert.equal(tracker.has('id-0'), false);
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assert.equal(tracker.has('id-91'), false);
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assert.equal(tracker.has('id-92'), true);
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assert.equal(tracker.has('id-99'), true);
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});
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test('re-remembering an existing id does not promote it (FIFO, not LRU)', () => {
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// Insertion-order semantics: re-adding doesn't move it forward in
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// Set iteration order. This is intentional — we don't need recency,
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// just bounded membership. Pin the actual behaviour so future
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// refactors don't accidentally introduce LRU refresh semantics.
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const tracker = createOutboundIdTracker(2);
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tracker.remember('a');
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tracker.remember('b');
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tracker.remember('a'); // no-op for ordering
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tracker.remember('c'); // evicts 'a' (oldest by insertion)
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assert.equal(tracker.has('a'), false);
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assert.equal(tracker.has('b'), true);
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assert.equal(tracker.has('c'), true);
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});
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test('rejects non-positive maxSize', () => {
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assert.throws(() => createOutboundIdTracker(0), RangeError);
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assert.throws(() => createOutboundIdTracker(-1), RangeError);
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assert.throws(() => createOutboundIdTracker(1.5), RangeError);
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});
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