test(background-agent): isolate logger mocks

src/features/background-agent/abort-with-timeout.test.ts

@@ -1,15 +1,12 @@
-import { afterAll, beforeEach, describe, expect, mock, test } from "bun:test"
+import { afterEach, beforeEach, describe, expect, mock, test } from "bun:test"
 
 const logMock = mock(() => {})
 
-mock.module("../../shared/logger", () => ({
-  log: logMock,
-}))
-
 import type { OpencodeClient } from "./opencode-client"
+import type { abortWithTimeout as abortWithTimeoutFunction } from "./abort-with-timeout"
 
-const { abortWithTimeout } = await import("./abort-with-timeout")
-mock.restore()
+let abortWithTimeout: typeof abortWithTimeoutFunction
+let importCounter = 0
 
 function createClient(abort: (...args: Array<unknown>) => Promise<unknown>): OpencodeClient {
   return {
@@ -20,11 +17,16 @@ function createClient(abort: (...args: Array<unknown>) => Promise<unknown>): Ope
 }
 
 describe("abortWithTimeout", () => {
-  beforeEach(() => {
+  beforeEach(async () => {
     logMock.mockClear()
+    mock.module("../../shared/logger", () => ({
+      log: logMock,
+    }))
+    ;({ abortWithTimeout } = await import(`./abort-with-timeout?test=${importCounter}`))
+    importCounter += 1
   })
 
-  afterAll(() => {
+  afterEach(() => {
     mock.restore()
   })
 

src/features/background-agent/process-cleanup.test.ts

@@ -24,6 +24,7 @@ type CleanupManager = {
 // This prevents bun test from exiting with non-zero code if any test
 // called scheduleForcedExit() with exitCode=1
 afterAll(() => {
+  mock.restore()
   process.exitCode = 0
 })
 

src/features/background-agent/session-status-classifier.test.ts

@@ -1,12 +1,24 @@
-import { describe, test, expect, mock, afterAll } from "bun:test"
+import { afterEach, beforeEach, describe, expect, mock, test } from "bun:test"
+import type {
+  isActiveSessionStatus as isActiveSessionStatusFunction,
+  isTerminalSessionStatus as isTerminalSessionStatusFunction,
+} from "./session-status-classifier"
 
 const mockLog = mock()
-mock.module("../../shared/logger", () => ({ log: mockLog }))
+let isActiveSessionStatus: typeof isActiveSessionStatusFunction
+let isTerminalSessionStatus: typeof isTerminalSessionStatusFunction
+let importCounter = 0
 
-afterAll(() => { mock.restore() })
+beforeEach(async () => {
+  mockLog.mockClear()
+  mock.module("../../shared/logger", () => ({ log: mockLog }))
+  ;({ isActiveSessionStatus, isTerminalSessionStatus } = await import(`./session-status-classifier?test=${importCounter}`))
+  importCounter += 1
+})
 
-const { isActiveSessionStatus, isTerminalSessionStatus } = await import("./session-status-classifier")
-mock.restore()
+afterEach(() => {
+  mock.restore()
+})
 
 describe("isActiveSessionStatus", () => {
   describe("#given a known active session status", () => {

src/shared/logger.test.ts

@@ -5,7 +5,7 @@
 // re-exports this logger) cannot leak a no-op `log` into our imports. See
 // script/run-ci-tests.ts — the `mock.module(` substring routes the file out of
 // the shared batch.
-import { afterEach, beforeEach, describe, expect, mock, test } from "bun:test"
+import { afterAll, afterEach, beforeEach, describe, expect, mock, test } from "bun:test"
 mock.module("./logger-test-isolation", () => ({}))
 
 import * as fs from "fs"
@@ -16,6 +16,10 @@ type LoggerModule = typeof import("./logger")
 
 const TEST_PREFIX = "oh-my-opencode-logger-test"
 
+afterAll(() => {
+  mock.restore()
+})
+
 function makeTempDir(): string {
   return fs.mkdtempSync(path.join(os.tmpdir(), `${TEST_PREFIX}-`))
 }