Initial Commit

packages/foundation/flow/queue-distribution-worker-thread/tests/helpers/fake-thread-worker.ts

@@ -0,0 +1,53 @@
+import type { ThreadWorkerLike } from "../../src/communicator/worker-thread/worker-thread-communicator.js";
+
+interface Listener {
+    event: string;
+    handler: (event: { data?: unknown; error?: unknown }) => void;
+}
+
+export interface FakeThreadWorker extends ThreadWorkerLike {
+    deliver(message: unknown): void;
+    emitError(error: unknown): void;
+    emitExit(): void;
+    posted: unknown[];
+    terminated: boolean;
+}
+
+export function makeFakeThreadWorker(): FakeThreadWorker {
+    const listeners: Listener[] = [];
+    const worker: FakeThreadWorker = {
+        posted: [],
+        terminated: false,
+        postMessage(message: unknown): void {
+            worker.posted.push(message);
+        },
+        addEventListener(event, handler): void {
+            listeners.push({ event, handler });
+        },
+        terminate(): void {
+            worker.terminated = true;
+        },
+        deliver(message: unknown): void {
+            for (const l of listeners) {
+                if (l.event === "message") {
+                    l.handler({ data: message });
+                }
+            }
+        },
+        emitError(error: unknown): void {
+            for (const l of listeners) {
+                if (l.event === "error") {
+                    l.handler({ error });
+                }
+            }
+        },
+        emitExit(): void {
+            for (const l of listeners) {
+                if (l.event === "exit") {
+                    l.handler({});
+                }
+            }
+        },
+    };
+    return worker;
+}