[Init] Initial commit - NetMesh terminal manager

components/terminal/connectAutomationBatch.test.ts

@@ -0,0 +1,57 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+
+import {
+  cancelConnectAutomationBatch,
+  createConnectAutomationBatch,
+  trackConnectAutomationStop,
+} from "./connectAutomationBatch.ts";
+
+test("cancel waits for the stop operation registered by the abort listener", async () => {
+  const batch = createConnectAutomationBatch();
+  let releaseStop: (() => void) | undefined;
+  let stopFinished = false;
+
+  batch.controller.signal.addEventListener("abort", () => {
+    trackConnectAutomationStop(batch, () => new Promise<void>((resolve) => {
+      releaseStop = () => {
+        stopFinished = true;
+        resolve();
+      };
+    }));
+  }, { once: true });
+
+  const cancelling = cancelConnectAutomationBatch(batch);
+  await Promise.resolve();
+  assert.equal(stopFinished, false);
+  releaseStop?.();
+  await cancelling;
+  assert.equal(stopFinished, true);
+});
+
+test("cancel surfaces a backend stop failure", async () => {
+  const batch = createConnectAutomationBatch();
+  batch.controller.signal.addEventListener("abort", () => {
+    trackConnectAutomationStop(batch, async () => {
+      throw new Error("stop failed");
+    });
+  }, { once: true });
+
+  await assert.rejects(() => cancelConnectAutomationBatch(batch), /stop failed/);
+});
+
+test("cancel can retry a stop operation after a transient failure", async () => {
+  const batch = createConnectAutomationBatch();
+  let attempts = 0;
+  trackConnectAutomationStop(batch, async () => {
+    attempts += 1;
+    if (attempts === 1) throw new Error("temporary stop failure");
+  });
+
+  await assert.rejects(
+    () => cancelConnectAutomationBatch(batch),
+    /temporary stop failure/,
+  );
+  await cancelConnectAutomationBatch(batch);
+  assert.equal(attempts, 2);
+});