test(cli): add banner emission reset helper (#87121)

src/cli/banner.test.ts

@@ -132,4 +132,29 @@ describe("emitCliBanner", () => {
     expect(writeSpy).toHaveBeenCalledWith("\n🦞 OpenClaw 2026.3.7 (abc1234)\n\n");
     expect(hasEmittedCliBanner()).toBe(true);
   });
+
+  it("can reset banner emission state for same-module tests", async () => {
+    const { emitCliBanner, hasEmittedCliBanner, testing } = await importFreshBannerModule();
+    setStdoutIsTty(true);
+    const writeSpy = vi.spyOn(process.stdout, "write").mockImplementation(() => true);
+
+    const options = {
+      argv: ["node", "openclaw"],
+      commit: "abc1234",
+      env: { LANG: "en_US.UTF-8" },
+      isTty: true,
+      mode: "off" as const,
+      platform: "darwin" as const,
+      richTty: false,
+    };
+
+    emitCliBanner("2026.3.7", options);
+    expect(hasEmittedCliBanner()).toBe(true);
+
+    testing.resetBannerEmittedForTests();
+    expect(hasEmittedCliBanner()).toBe(false);
+
+    emitCliBanner("2026.3.7", options);
+    expect(writeSpy).toHaveBeenCalledTimes(2);
+  });
 });

src/cli/banner.ts

@@ -117,3 +117,10 @@ export function emitCliBanner(version: string, options: BannerOptions = {}) {
 export function hasEmittedCliBanner(): boolean {
   return bannerEmitted;
 }
+
+export const testing = {
+  resetBannerEmittedForTests(): void {
+    bannerEmitted = false;
+  },
+};
+export { testing as __testing };