import Darwinimport Foundationimport Testing@testable import CodexBar struct CodexLoginRunnerTests {    @Test    func `login runner returns timeout before hung codex exits`() async throws {        let root = FileManager.default.temporaryDirectory            .appendingPathComponent("codexbar-login-runner-\(UUID().uuidString)", isDirectory: true)        let binDir = root.appendingPathComponent("bin", isDirectory: true)        let homeDir = root.appendingPathComponent("home", isDirectory: true)        try FileManager.default.createDirectory(at: binDir, withIntermediateDirectories: true)        try FileManager.default.createDirectory(at: homeDir, withIntermediateDirectories: true)        defer { try? FileManager.default.removeItem(at: root) }         let codex = binDir.appendingPathComponent("codex")        let script = """        #!/usr/bin/python3        import time         print("login-started", flush=True)        time.sleep(5)        print("login-finished", flush=True)        """        try script.write(to: codex, atomically: true, encoding: .utf8)        try FileManager.default.setAttributes([.posixPermissions: 0o755], ofItemAtPath: codex.path)         let start = Date()        let result = await CodexLoginRunner.run(            homePath: homeDir.path,            timeout: 0.2,            environment: ["PATH": binDir.path],            loginPATH: nil)        let elapsed = Date().timeIntervalSince(start)         #expect(result.outcome == .timedOut)        #expect(result.output.contains("login-finished") == false)        #expect(elapsed < 2.0, "Timeout should return promptly, took \(elapsed)s")    }     @Test    func `login runner bounds output drain when detached child keeps pipes open`() async throws {        let root = FileManager.default.temporaryDirectory            .appendingPathComponent("codexbar-login-drain-\(UUID().uuidString)", isDirectory: true)        let binDir = root.appendingPathComponent("bin", isDirectory: true)        let homeDir = root.appendingPathComponent("home", isDirectory: true)        let childPIDFile = root.appendingPathComponent("child.pid")        try FileManager.default.createDirectory(at: binDir, withIntermediateDirectories: true)        try FileManager.default.createDirectory(at: homeDir, withIntermediateDirectories: true)        defer { try? FileManager.default.removeItem(at: root) }        defer {            if let text = try? String(contentsOf: childPIDFile, encoding: .utf8),               let childPID = pid_t(text.trimmingCharacters(in: .whitespacesAndNewlines))            {                _ = kill(childPID, SIGKILL)            }        }         let codex = binDir.appendingPathComponent("codex")        let script = """        #!/bin/sh        /bin/sh -c 'trap "" TERM; /bin/sleep 5' &        child_pid=$!        printf '%s\\n' "$child_pid" > "$CODEXBAR_TEST_CHILD_PID_FILE"        printf 'login-started\\n'        /bin/sleep 5        """        try script.write(to: codex, atomically: true, encoding: .utf8)        try FileManager.default.setAttributes([.posixPermissions: 0o755], ofItemAtPath: codex.path)         let start = Date()        let result = await CodexLoginRunner.run(            homePath: homeDir.path,            timeout: 1,            outputDrainTimeout: 0.2,            environment: [                "CODEXBAR_TEST_CHILD_PID_FILE": childPIDFile.path,                "PATH": binDir.path,            ],            loginPATH: nil)        let elapsed = Date().timeIntervalSince(start)         #expect(result.outcome == .timedOut)        #expect(result.output.contains("login-started"))        #expect(elapsed < 3.0, "Output drain should stay bounded, took \(elapsed)s")    }}