feat(ql3): establish 3.0 incubation baseline

test/back/runLostRetryLifecycle.test.cjs

@@ -0,0 +1,204 @@
+require('ts-node/register/transpile-only');
+
+const assert = require('node:assert/strict');
+const { test } = require('node:test');
+const {
+  RunLostRetryLifecycle,
+} = require('../../back/runtime/application/runLostRetryLifecycle');
+
+function deferred() {
+  let resolve;
+  let reject;
+  const promise = new Promise((resolvePromise, rejectPromise) => {
+    resolve = resolvePromise;
+    reject = rejectPromise;
+  });
+  return { promise, resolve, reject };
+}
+
+function fakeScheduler() {
+  let id = 0;
+  const pending = new Map();
+  const cleared = [];
+  return {
+    pending,
+    cleared,
+    scheduler: {
+      setTimeout(callback, delayMs) {
+        const timer = {
+          id: ++id,
+          delayMs,
+          unrefCalls: 0,
+          unref() {
+            this.unrefCalls += 1;
+          },
+        };
+        pending.set(timer.id, { timer, callback });
+        return timer;
+      },
+      clearTimeout(timer) {
+        cleared.push(timer.id);
+        pending.delete(timer.id);
+      },
+    },
+    fireNext() {
+      const next = pending.values().next().value;
+      assert.ok(next, 'expected a scheduled timer');
+      pending.delete(next.timer.id);
+      next.callback();
+      return next.timer;
+    },
+  };
+}
+
+function scanSummary() {
+  return {
+    observedAtMs: 1_750_000_000_000,
+    scanned: 1,
+    failed: 0,
+    truncated: false,
+    counts: { scheduled: 1 },
+    failures: [],
+  };
+}
+
+async function flush() {
+  await new Promise((resolve) => setImmediate(resolve));
+}
+
+test('is inert until started and runs one non-overlapping page per tick', async () => {
+  const timers = fakeScheduler();
+  const first = deferred();
+  const summaries = [];
+  let calls = 0;
+  const lifecycle = new RunLostRetryLifecycle(
+    {
+      async scan(options) {
+        calls += 1;
+        assert.deepEqual(options, { limit: 8 });
+        return first.promise;
+      },
+    },
+    {
+      intervalMs: 30_000,
+      initialDelayMs: 100,
+      pageSize: 8,
+      scheduler: timers.scheduler,
+      onCycle(summary) {
+        summaries.push(summary);
+      },
+    },
+  );
+
+  assert.equal(timers.pending.size, 0);
+  assert.equal(lifecycle.start(), true);
+  assert.equal(lifecycle.start(), false);
+  const initial = timers.fireNext();
+  assert.equal(initial.delayMs, 100);
+  assert.equal(initial.unrefCalls, 1);
+  await flush();
+  assert.equal(calls, 1);
+  assert.equal(timers.pending.size, 0);
+
+  first.resolve(scanSummary());
+  await flush();
+  assert.deepEqual(summaries, [scanSummary()]);
+  const next = timers.pending.values().next().value.timer;
+  assert.equal(next.delayMs, 30_000);
+  assert.equal(next.unrefCalls, 1);
+  assert.equal(await lifecycle.stop(), 'drained');
+  assert.deepEqual(timers.cleared, [next.id]);
+});
+
+test('reports scan and observer failures without callback failure loops', async () => {
+  const timers = fakeScheduler();
+  const errors = [];
+  let calls = 0;
+  const lifecycle = new RunLostRetryLifecycle(
+    {
+      async scan() {
+        calls += 1;
+        if (calls === 1) throw new Error('database busy');
+        return scanSummary();
+      },
+    },
+    {
+      intervalMs: 5_000,
+      scheduler: timers.scheduler,
+      onCycle() {
+        throw new Error('metrics sink failed');
+      },
+      onError(error) {
+        errors.push(error.message);
+        if (errors.length === 2) throw new Error('error sink failed');
+      },
+    },
+  );
+
+  lifecycle.start();
+  timers.fireNext();
+  await flush();
+  assert.deepEqual(errors, ['database busy']);
+
+  timers.fireNext();
+  await flush();
+  assert.deepEqual(errors, ['database busy', 'metrics sink failed']);
+  assert.equal(timers.pending.size, 1);
+  assert.equal(await lifecycle.stop(), 'drained');
+});
+
+test('bounds shutdown and refuses restart while an old scan is in flight', async () => {
+  const timers = fakeScheduler();
+  const running = deferred();
+  const lifecycle = new RunLostRetryLifecycle(
+    {
+      async scan() {
+        return running.promise;
+      },
+    },
+    {
+      intervalMs: 5_000,
+      stopTimeoutMs: 5,
+      scheduler: timers.scheduler,
+    },
+  );
+  lifecycle.start();
+  timers.fireNext();
+  await flush();
+
+  assert.equal(await lifecycle.stop(), 'timed_out');
+  assert.equal(timers.pending.size, 0);
+  assert.equal(lifecycle.start(), false);
+  running.resolve(scanSummary());
+  await flush();
+  assert.equal(lifecycle.start(), true);
+  assert.equal(await lifecycle.stop(), 'drained');
+});
+
+test('rejects hot loops, invalid pages, and unbounded shutdown waits', () => {
+  const scanner = {
+    async scan() {
+      return scanSummary();
+    },
+  };
+  assert.throws(
+    () => new RunLostRetryLifecycle(scanner, { intervalMs: 249 }),
+    RangeError,
+  );
+  assert.throws(
+    () =>
+      new RunLostRetryLifecycle(scanner, {
+        intervalMs: 500,
+        pageSize: 65,
+      }),
+    RangeError,
+  );
+  assert.throws(
+    () =>
+      new RunLostRetryLifecycle(scanner, {
+        intervalMs: 500,
+        stopTimeoutMs: 60_001,
+      }),
+    RangeError,
+  );
+});