test(auto-compact): localize fake timers per async case

Stop patching global timers in every lock-management test. Use scoped fake timers only in continuation tests so lock/notification assertions remain deterministic in CI.

src/hooks/anthropic-context-window-limit-recovery/executor.test.ts

@@ -1,4 +1,4 @@
-import { afterEach, beforeEach, describe, expect, mock, spyOn, test } from "bun:test"
+import { beforeEach, describe, expect, mock, spyOn, test } from "bun:test"
 import { executeCompact } from "./executor"
 import type { AutoCompactState } from "./types"
 import * as storage from "./storage"
@@ -78,7 +78,6 @@ function createFakeTimeouts(): FakeTimeouts {
 describe("executeCompact lock management", () => {
   let autoCompactState: AutoCompactState
   let mockClient: any
-  let fakeTimeouts: FakeTimeouts
   const sessionID = "test-session-123"
   const directory = "/test/dir"
   const msg = { providerID: "anthropic", modelID: "claude-opus-4-6" }
@@ -106,14 +105,9 @@ describe("executeCompact lock management", () => {
       },
     }
 
-    fakeTimeouts = createFakeTimeouts()
   })
 
-  afterEach(() => {
+  test("clears lock on successful summarize completion", async () => {
-    fakeTimeouts.restore()
-  })
-
-  test.serial("clears lock on successful summarize completion", async () => {
     // given: Valid session with providerID/modelID
     autoCompactState.errorDataBySession.set(sessionID, {
       errorType: "token_limit",
@@ -128,7 +122,7 @@ describe("executeCompact lock management", () => {
     expect(autoCompactState.compactionInProgress.has(sessionID)).toBe(false)
   })
 
-  test.serial("clears lock when summarize throws exception", async () => {
+  test("clears lock when summarize throws exception", async () => {
     // given: Summarize will fail
     mockClient.session.summarize = mock(() =>
       Promise.reject(new Error("Network timeout")),
@@ -146,7 +140,7 @@ describe("executeCompact lock management", () => {
     expect(autoCompactState.compactionInProgress.has(sessionID)).toBe(false)
   })
 
-  test.serial("shows toast when lock already held", async () => {
+  test("shows toast when lock already held", async () => {
     // given: Lock already held
     autoCompactState.compactionInProgress.add(sessionID)
 
@@ -168,7 +162,7 @@ describe("executeCompact lock management", () => {
     expect(autoCompactState.compactionInProgress.has(sessionID)).toBe(true)
   })
 
-  test.serial("clears lock when fixEmptyMessages path executes", async () => {
+  test("clears lock when fixEmptyMessages path executes", async () => {
     //#given - Empty content error scenario with no messages in storage
     const readMessagesSpy = spyOn(messagesReader, "readMessages").mockReturnValue([])
     autoCompactState.errorDataBySession.set(sessionID, {
@@ -186,7 +180,7 @@ describe("executeCompact lock management", () => {
     readMessagesSpy.mockRestore()
   })
 
-  test.serial("clears lock when truncation is sufficient", async () => {
+  test("clears lock when truncation is sufficient", async () => {
     //#given - Aggressive truncation scenario with no messages in storage
     const readMessagesSpy = spyOn(messagesReader, "readMessages").mockReturnValue([])
     autoCompactState.errorDataBySession.set(sessionID, {
@@ -215,7 +209,7 @@ describe("executeCompact lock management", () => {
     readMessagesSpy.mockRestore()
   })
 
-  test.serial("prevents concurrent compaction attempts", async () => {
+  test("prevents concurrent compaction attempts", async () => {
     // given: Lock already held (simpler test)
     autoCompactState.compactionInProgress.add(sessionID)
 
@@ -233,7 +227,7 @@ describe("executeCompact lock management", () => {
     expect(autoCompactState.compactionInProgress.has(sessionID)).toBe(true)
   })
 
-  test.serial("clears lock after max recovery attempts exhausted", async () => {
+  test("clears lock after max recovery attempts exhausted", async () => {
     // given: All retry/revert attempts exhausted
     mockClient.session.messages = mock(() => Promise.resolve({ data: [] }))
 
@@ -265,7 +259,7 @@ describe("executeCompact lock management", () => {
     expect(autoCompactState.compactionInProgress.has(sessionID)).toBe(false)
   })
 
-  test.serial("clears lock when client.tui.showToast throws", async () => {
+  test("clears lock when client.tui.showToast throws", async () => {
     // given: Toast will fail (this should never happen but testing robustness)
     mockClient.tui.showToast = mock(() =>
       Promise.reject(new Error("Toast failed")),
@@ -283,7 +277,7 @@ describe("executeCompact lock management", () => {
     expect(autoCompactState.compactionInProgress.has(sessionID)).toBe(false)
   })
 
-  test.serial("clears lock when promptAsync in continuation throws", async () => {
+  test("clears lock when promptAsync in continuation throws", async () => {
     // given: promptAsync will fail during continuation
     mockClient.session.promptAsync = mock(() =>
       Promise.reject(new Error("Prompt failed")),
@@ -294,18 +288,23 @@ describe("executeCompact lock management", () => {
       maxTokens: 200000,
     })
 
+    const fakeTimeouts = createFakeTimeouts()
+    try {
       // when: Execute compaction
       await executeCompact(sessionID, msg, autoCompactState, mockClient, directory)
 
       // Wait for setTimeout callback
       await fakeTimeouts.advanceBy(600)
+    } finally {
+      fakeTimeouts.restore()
+    }
 
     // then: Lock should be cleared
     // The continuation happens in setTimeout, but lock is cleared in finally before that
     expect(autoCompactState.compactionInProgress.has(sessionID)).toBe(false)
   })
 
-  test.serial("falls through to summarize when truncation is insufficient", async () => {
+  test("falls through to summarize when truncation is insufficient", async () => {
     // given: Over token limit with truncation returning insufficient
     autoCompactState.errorDataBySession.set(sessionID, {
       errorType: "token_limit",
@@ -346,7 +345,7 @@ describe("executeCompact lock management", () => {
     truncateSpy.mockRestore()
   })
 
-  test.serial("does NOT call summarize when truncation is sufficient", async () => {
+  test("does NOT call summarize when truncation is sufficient", async () => {
     // given: Over token limit with truncation returning sufficient
     autoCompactState.errorDataBySession.set(sessionID, {
       errorType: "token_limit",
@@ -366,11 +365,16 @@ describe("executeCompact lock management", () => {
       ],
     })
 
+    const fakeTimeouts = createFakeTimeouts()
+    try {
       // when: Execute compaction
       await executeCompact(sessionID, msg, autoCompactState, mockClient, directory)
 
       // Wait for setTimeout callback
       await fakeTimeouts.advanceBy(600)
+    } finally {
+      fakeTimeouts.restore()
+    }
 
     // then: Truncation was attempted
     expect(truncateSpy).toHaveBeenCalled()