test: cover typing and history helpers

src/channels/typing.test.ts

@@ -0,0 +1,42 @@
+import { describe, expect, it, vi } from "vitest";
+
+import { createTypingCallbacks } from "./typing.js";
+
+const flush = () => new Promise((resolve) => setTimeout(resolve, 0));
+
+describe("createTypingCallbacks", () => {
+  it("invokes start on reply start", async () => {
+    const start = vi.fn().mockResolvedValue(undefined);
+    const onStartError = vi.fn();
+    const callbacks = createTypingCallbacks({ start, onStartError });
+
+    await callbacks.onReplyStart();
+
+    expect(start).toHaveBeenCalledTimes(1);
+    expect(onStartError).not.toHaveBeenCalled();
+  });
+
+  it("reports start errors", async () => {
+    const start = vi.fn().mockRejectedValue(new Error("fail"));
+    const onStartError = vi.fn();
+    const callbacks = createTypingCallbacks({ start, onStartError });
+
+    await callbacks.onReplyStart();
+
+    expect(onStartError).toHaveBeenCalledTimes(1);
+  });
+
+  it("invokes stop on idle and reports stop errors", async () => {
+    const start = vi.fn().mockResolvedValue(undefined);
+    const stop = vi.fn().mockRejectedValue(new Error("stop"));
+    const onStartError = vi.fn();
+    const onStopError = vi.fn();
+    const callbacks = createTypingCallbacks({ start, stop, onStartError, onStopError });
+
+    callbacks.onIdle?.();
+    await flush();
+
+    expect(stop).toHaveBeenCalledTimes(1);
+    expect(onStopError).toHaveBeenCalledTimes(1);
+  });
+});