[Init] Initial commit - NetMesh terminal manager

components/systemManager/processListCache.test.ts

@@ -0,0 +1,67 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import type { SystemProcessInfo } from '../../domain/systemManager/types';
+import {
+  PROCESS_LIST_CACHE_MAX_ROWS,
+  PROCESS_LIST_CACHE_MAX_SESSIONS,
+  clearCachedProcessList,
+  getCachedProcessList,
+  getProcessListCacheStatsForTests,
+  resetProcessListCacheForTests,
+  setCachedProcessList,
+} from './processListCache';
+
+const processRow = (pid: number): SystemProcessInfo => ({
+  pid,
+  ppid: 1,
+  user: 'root',
+  stat: 'S',
+  command: `process-${pid}`,
+  cpuPercent: 0,
+  memPercent: 0,
+  rssKb: 1,
+  vszKb: 1,
+  elapsed: '0:01',
+});
+
+test.beforeEach(resetProcessListCacheForTests);
+test.afterEach(resetProcessListCacheForTests);
+
+test('process list cache stays bounded across session churn and evicts least-recently-used entries', () => {
+  const rows = [processRow(1), processRow(2)];
+  const now = Date.now();
+  for (let index = 0; index < PROCESS_LIST_CACHE_MAX_SESSIONS; index += 1) {
+    setCachedProcessList(`session-${index}`, rows, now + index);
+  }
+  assert.ok(getCachedProcessList('session-0'));
+  setCachedProcessList('session-overflow', rows, now + PROCESS_LIST_CACHE_MAX_SESSIONS + 1);
+
+  const stats = getProcessListCacheStatsForTests();
+  assert.equal(stats.sessions, PROCESS_LIST_CACHE_MAX_SESSIONS);
+  assert.ok(stats.sessionIds.includes('session-0'));
+  assert.ok(!stats.sessionIds.includes('session-1'));
+});
+
+test('process list cache enforces a total row budget and rejects one oversized response', () => {
+  const halfBudget = Array.from(
+    { length: Math.floor(PROCESS_LIST_CACHE_MAX_ROWS / 2) + 1 },
+    (_, index) => processRow(index),
+  );
+  setCachedProcessList('left', halfBudget, 1);
+  setCachedProcessList('right', halfBudget, 2);
+  assert.ok(getProcessListCacheStatsForTests().rows <= PROCESS_LIST_CACHE_MAX_ROWS);
+
+  setCachedProcessList(
+    'oversized',
+    Array.from({ length: PROCESS_LIST_CACHE_MAX_ROWS + 1 }, (_, index) => processRow(index)),
+    3,
+  );
+  assert.equal(getCachedProcessList('oversized'), null);
+});
+
+test('process list cache releases a closed or unmounted session immediately', () => {
+  setCachedProcessList('closed-session', [processRow(1)]);
+  clearCachedProcessList('closed-session');
+  assert.equal(getCachedProcessList('closed-session'), null);
+  assert.equal(getProcessListCacheStatsForTests().sessions, 0);
+});