fix(test): add opt-in vitest no-output watchdog

test/scripts/run-vitest.test.ts

@@ -1,6 +1,9 @@
-import { describe, expect, it } from "vitest";
+import { EventEmitter } from "node:events";
+import { describe, expect, it, vi } from "vitest";
 import {
+  installVitestNoOutputWatchdog,
   resolveVitestNodeArgs,
+  resolveVitestNoOutputTimeoutMs,
   resolveVitestSpawnParams,
   shouldSuppressVitestStderrLine,
 } from "../../scripts/run-vitest.mjs";
@@ -19,6 +22,16 @@ describe("scripts/run-vitest", () => {
     ).toEqual([]);
   });
 
+  it("parses the optional no-output timeout env", () => {
+    expect(resolveVitestNoOutputTimeoutMs({})).toBeNull();
+    expect(resolveVitestNoOutputTimeoutMs({ OPENCLAW_VITEST_NO_OUTPUT_TIMEOUT_MS: "2500" })).toBe(
+      2500,
+    );
+    expect(
+      resolveVitestNoOutputTimeoutMs({ OPENCLAW_VITEST_NO_OUTPUT_TIMEOUT_MS: "0" }),
+    ).toBeNull();
+  });
+
   it("spawns vitest in a detached process group on Unix hosts", () => {
     expect(resolveVitestSpawnParams({ PATH: "/usr/bin" }, "darwin")).toEqual({
       env: { PATH: "/usr/bin" },
@@ -40,4 +53,48 @@ describe("scripts/run-vitest", () => {
     ).toBe(true);
     expect(shouldSuppressVitestStderrLine("real failure output\n")).toBe(false);
   });
+
+  it("kills silent vitest runs after the configured idle timeout", () => {
+    vi.useFakeTimers();
+    try {
+      const stdout = new EventEmitter();
+      const timeoutSpy = vi.fn();
+      const forceKillSpy = vi.fn();
+      const logSpy = vi.fn();
+
+      const teardown = installVitestNoOutputWatchdog({
+        streams: [stdout],
+        timeoutMs: 1000,
+        forceKillAfterMs: 5000,
+        log: logSpy,
+        onTimeout: timeoutSpy,
+        onForceKill: forceKillSpy,
+        setTimeoutFn: setTimeout,
+        clearTimeoutFn: clearTimeout,
+      });
+
+      vi.advanceTimersByTime(900);
+      expect(timeoutSpy).not.toHaveBeenCalled();
+
+      stdout.emit("data", "still alive");
+      vi.advanceTimersByTime(900);
+      expect(timeoutSpy).not.toHaveBeenCalled();
+
+      vi.advanceTimersByTime(100);
+      expect(timeoutSpy).toHaveBeenCalledTimes(1);
+      expect(logSpy).toHaveBeenCalledWith(
+        "[vitest] no output for 1000ms; terminating stalled Vitest process group.",
+      );
+
+      vi.advanceTimersByTime(5000);
+      expect(forceKillSpy).toHaveBeenCalledTimes(1);
+      expect(logSpy).toHaveBeenCalledWith(
+        "[vitest] process group still alive after 5000ms; sending SIGKILL.",
+      );
+
+      teardown();
+    } finally {
+      vi.useRealTimers();
+    }
+  });
 });