OXIESEC PANEL

Name	Size	Modified	Perms
📁 ..	-	12/01/2022 06:13:58 PM	rwxr-xr-x
📄 dir.go	4.4 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 dir_darwin.go	2.92 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 dir_plan9.go	2.03 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 dir_unix.go	4.95 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 dir_windows.go	1.69 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 dirent_aix.go	759 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 dirent_dragonfly.go	1.28 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 dirent_freebsd.go	1.16 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 dirent_js.go	678 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 dirent_linux.go	1.18 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 dirent_netbsd.go	1.16 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 dirent_openbsd.go	1.16 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 dirent_solaris.go	759 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 endian_big.go	244 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 endian_little.go	304 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 env.go	3.84 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 env_test.go	5.03 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 env_unix_test.go	1.22 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 error.go	4.84 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 error_errno.go	247 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 error_plan9.go	234 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 error_posix.go	527 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 error_test.go	4.92 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 error_unix_test.go	1.48 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 error_windows_test.go	1.72 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 example_test.go	5.25 KB	12/01/2022 06:12:59 PM	rw-r--r--
📁 exec	-	12/01/2022 06:13:56 PM	rwxr-xr-x
📄 exec.go	5.95 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 exec_plan9.go	3.27 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 exec_posix.go	3.42 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 exec_unix.go	2.1 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 exec_unix_test.go	643 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 exec_windows.go	4.87 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 executable.go	774 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 executable_darwin.go	613 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 executable_dragonfly.go	293 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 executable_freebsd.go	292 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 executable_path.go	2.31 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 executable_plan9.go	427 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 executable_procfs.go	920 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 executable_solaris.go	695 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 executable_sysctl.go	891 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 executable_test.go	3.38 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 executable_windows.go	641 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 export_linux_test.go	216 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 export_test.go	395 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 export_unix_test.go	231 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 export_windows_test.go	349 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 fifo_test.go	1.78 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 file.go	22.12 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 file_plan9.go	14.91 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 file_posix.go	6.95 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 file_unix.go	12.09 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 file_windows.go	13.69 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 getwd.go	2.52 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 os_test.go	66.08 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 os_unix_test.go	8.4 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 os_windows_test.go	32.18 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 path.go	2.01 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 path_plan9.go	497 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 path_test.go	2.84 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 path_unix.go	1.55 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 path_windows.go	5.97 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 path_windows_test.go	2.73 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 pipe2_unix.go	658 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 pipe_test.go	11.1 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 pipe_unix.go	794 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 proc.go	2.09 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 rawconn.go	993 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 rawconn_test.go	1.13 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 read_test.go	3.04 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 readfrom_linux.go	1.03 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 readfrom_linux_test.go	9.58 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 readfrom_stub.go	302 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 removeall_at.go	4.73 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 removeall_noat.go	3.13 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 removeall_test.go	10.09 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 rlimit.go	1.24 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 rlimit_darwin.go	622 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 rlimit_stub.go	412 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 rlimit_test.go	927 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📁 signal	-	12/01/2022 06:13:56 PM	rwxr-xr-x
📄 stat.go	733 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 stat_aix.go	1.18 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 stat_darwin.go	1.09 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 stat_dragonfly.go	1.06 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 stat_freebsd.go	1.07 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 stat_js.go	1.11 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 stat_linux.go	1.06 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 stat_netbsd.go	1.07 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 stat_openbsd.go	1.06 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 stat_plan9.go	2.29 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 stat_solaris.go	1.3 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 stat_test.go	5.98 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 stat_unix.go	1.22 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 stat_windows.go	3.56 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 sticky_bsd.go	415 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 sticky_notbsd.go	320 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 str.go	817 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 sys.go	294 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 sys_aix.go	682 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 sys_bsd.go	456 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 sys_js.go	313 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 sys_linux.go	1.04 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 sys_plan9.go	453 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 sys_solaris.go	265 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 sys_unix.go	493 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 sys_windows.go	874 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 tempfile.go	3.84 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 tempfile_test.go	5.4 KB	12/01/2022 06:12:59 PM	rw-r--r--
📁 testdata	-	12/01/2022 06:13:56 PM	rwxr-xr-x
📄 timeout_test.go	17.04 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 types.go	2.79 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 types_plan9.go	815 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 types_unix.go	776 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 types_windows.go	6.31 KB	12/01/2022 06:12:59 PM	rw-r--r--
📁 user	-	12/01/2022 06:13:56 PM	rwxr-xr-x
📄 wait_unimp.go	899 bytes	12/01/2022 06:12:59 PM	rw-r--r--
📄 wait_wait6.go	1.48 KB	12/01/2022 06:12:59 PM	rw-r--r--
📄 wait_waitid.go	1.32 KB	12/01/2022 06:12:59 PM	rw-r--r--

Name

Size

Modified

Perms

📁 ..

12/01/2022 06:13:58 PM

rwxr-xr-x

📄 dir.go

4.4 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 dir_darwin.go

2.92 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 dir_plan9.go

2.03 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 dir_unix.go

4.95 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 dir_windows.go

1.69 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 dirent_aix.go

759 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 dirent_dragonfly.go

1.28 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 dirent_freebsd.go

1.16 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 dirent_js.go

678 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 dirent_linux.go

1.18 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 dirent_netbsd.go

1.16 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 dirent_openbsd.go

1.16 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 dirent_solaris.go

759 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 endian_big.go

244 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 endian_little.go

304 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 env.go

3.84 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 env_test.go

5.03 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 env_unix_test.go

1.22 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 error.go

4.84 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 error_errno.go

247 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 error_plan9.go

234 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 error_posix.go

527 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 error_test.go

4.92 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 error_unix_test.go

1.48 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 error_windows_test.go

1.72 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 example_test.go

5.25 KB

12/01/2022 06:12:59 PM

rw-r--r--

📁 exec

12/01/2022 06:13:56 PM

rwxr-xr-x

📄 exec.go

5.95 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 exec_plan9.go

3.27 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 exec_posix.go

3.42 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 exec_unix.go

2.1 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 exec_unix_test.go

643 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 exec_windows.go

4.87 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 executable.go

774 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 executable_darwin.go

613 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 executable_dragonfly.go

293 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 executable_freebsd.go

292 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 executable_path.go

2.31 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 executable_plan9.go

427 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 executable_procfs.go

920 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 executable_solaris.go

695 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 executable_sysctl.go

891 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 executable_test.go

3.38 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 executable_windows.go

641 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 export_linux_test.go

216 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 export_test.go

395 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 export_unix_test.go

231 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 export_windows_test.go

349 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 fifo_test.go

1.78 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 file.go

22.12 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 file_plan9.go

14.91 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 file_posix.go

6.95 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 file_unix.go

12.09 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 file_windows.go

13.69 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 getwd.go

2.52 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 os_test.go

66.08 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 os_unix_test.go

8.4 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 os_windows_test.go

32.18 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 path.go

2.01 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 path_plan9.go

497 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 path_test.go

2.84 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 path_unix.go

1.55 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 path_windows.go

5.97 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 path_windows_test.go

2.73 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 pipe2_unix.go

658 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 pipe_test.go

11.1 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 pipe_unix.go

794 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 proc.go

2.09 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 rawconn.go

993 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 rawconn_test.go

1.13 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 read_test.go

3.04 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 readfrom_linux.go

1.03 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 readfrom_linux_test.go

9.58 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 readfrom_stub.go

302 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 removeall_at.go

4.73 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 removeall_noat.go

3.13 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 removeall_test.go

10.09 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 rlimit.go

1.24 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 rlimit_darwin.go

622 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 rlimit_stub.go

412 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 rlimit_test.go

927 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📁 signal

12/01/2022 06:13:56 PM

rwxr-xr-x

📄 stat.go

733 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 stat_aix.go

1.18 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 stat_darwin.go

1.09 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 stat_dragonfly.go

1.06 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 stat_freebsd.go

1.07 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 stat_js.go

1.11 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 stat_linux.go

1.06 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 stat_netbsd.go

1.07 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 stat_openbsd.go

1.06 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 stat_plan9.go

2.29 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 stat_solaris.go

1.3 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 stat_test.go

5.98 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 stat_unix.go

1.22 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 stat_windows.go

3.56 KB

12/01/2022 06:12:59 PM

rw-r--r--

📄 sticky_bsd.go

415 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 sticky_notbsd.go

320 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 str.go

817 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 sys.go

294 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 sys_aix.go

682 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 sys_bsd.go

456 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 sys_js.go

313 bytes

12/01/2022 06:12:59 PM

rw-r--r--

📄 sys_linux.go

1.04 KB

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📄 sys_plan9.go

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📄 sys_windows.go

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📄 tempfile.go

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📁 testdata

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📄 timeout_test.go

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📄 types.go

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📄 types_windows.go

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📄 wait_unimp.go

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📄 wait_wait6.go

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📄 wait_waitid.go

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Editing: env_test.go

package os_test

import (
	. "os"
	"reflect"
	"strings"
	"testing"
)

// testGetenv gives us a controlled set of variables for testing Expand.
func testGetenv(s string) string {
	switch s {
	case "*":
		return "all the args"
	case "#":
		return "NARGS"
	case "$":
		return "PID"
	case "1":
		return "ARGUMENT1"
	case "HOME":
		return "/usr/gopher"
	case "H":
		return "(Value of H)"
	case "home_1":
		return "/usr/foo"
	case "_":
		return "underscore"
	}
	return ""
}

var expandTests = []struct {
	in, out string
}{
	{"", ""},
	{"$*", "all the args"},
	{"$$", "PID"},
	{"${*}", "all the args"},
	{"$1", "ARGUMENT1"},
	{"${1}", "ARGUMENT1"},
	{"now is the time", "now is the time"},
	{"$HOME", "/usr/gopher"},
	{"$home_1", "/usr/foo"},
	{"${HOME}", "/usr/gopher"},
	{"${H}OME", "(Value of H)OME"},
	{"A$$$#$1$H$home_1*B", "APIDNARGSARGUMENT1(Value of H)/usr/foo*B"},
	{"start$+middle$^end$", "start$+middle$^end$"},
	{"mixed$|bag$$$", "mixed$|bagPID$"},
	{"$", "$"},
	{"$}", "$}"},
	{"${", ""},  // invalid syntax; eat up the characters
	{"${}", ""}, // invalid syntax; eat up the characters
}

func TestExpand(t *testing.T) {
	for _, test := range expandTests {
		result := Expand(test.in, testGetenv)
		if result != test.out {
			t.Errorf("Expand(%q)=%q; expected %q", test.in, result, test.out)
		}
	}
}

var global any

func BenchmarkExpand(b *testing.B) {
	b.Run("noop", func(b *testing.B) {
		var s string
		b.ReportAllocs()
		for i := 0; i < b.N; i++ {
			s = Expand("tick tick tick tick", func(string) string { return "" })
		}
		global = s
	})
	b.Run("multiple", func(b *testing.B) {
		var s string
		b.ReportAllocs()
		for i := 0; i < b.N; i++ {
			s = Expand("$a $a $a $a", func(string) string { return "boom" })
		}
		global = s
	})
}

func TestConsistentEnviron(t *testing.T) {
	e0 := Environ()
	for i := 0; i < 10; i++ {
		e1 := Environ()
		if !reflect.DeepEqual(e0, e1) {
			t.Fatalf("environment changed")
		}
	}
}

func TestUnsetenv(t *testing.T) {
	const testKey = "GO_TEST_UNSETENV"
	set := func() bool {
		prefix := testKey + "="
		for _, key := range Environ() {
			if strings.HasPrefix(key, prefix) {
				return true
			}
		}
		return false
	}
	if err := Setenv(testKey, "1"); err != nil {
		t.Fatalf("Setenv: %v", err)
	}
	if !set() {
		t.Error("Setenv didn't set TestUnsetenv")
	}
	if err := Unsetenv(testKey); err != nil {
		t.Fatalf("Unsetenv: %v", err)
	}
	if set() {
		t.Fatal("Unsetenv didn't clear TestUnsetenv")
	}
}

func TestClearenv(t *testing.T) {
	const testKey = "GO_TEST_CLEARENV"
	const testValue = "1"

// reset env
	defer func(origEnv []string) {
		for _, pair := range origEnv {
			// Environment variables on Windows can begin with =
			// https://blogs.msdn.com/b/oldnewthing/archive/2010/05/06/10008132.aspx
			i := strings.Index(pair[1:], "=") + 1
			if err := Setenv(pair[:i], pair[i+1:]); err != nil {
				t.Errorf("Setenv(%q, %q) failed during reset: %v", pair[:i], pair[i+1:], err)
			}
		}
	}(Environ())

if err := Setenv(testKey, testValue); err != nil {
		t.Fatalf("Setenv(%q, %q) failed: %v", testKey, testValue, err)
	}
	if _, ok := LookupEnv(testKey); !ok {
		t.Errorf("Setenv(%q, %q) didn't set $%s", testKey, testValue, testKey)
	}
	Clearenv()
	if val, ok := LookupEnv(testKey); ok {
		t.Errorf("Clearenv() didn't clear $%s, remained with value %q", testKey, val)
	}
}

func TestLookupEnv(t *testing.T) {
	const smallpox = "SMALLPOX"      // No one has smallpox.
	value, ok := LookupEnv(smallpox) // Should not exist.
	if ok || value != "" {
		t.Fatalf("%s=%q", smallpox, value)
	}
	defer Unsetenv(smallpox)
	err := Setenv(smallpox, "virus")
	if err != nil {
		t.Fatalf("failed to release smallpox virus")
	}
	_, ok = LookupEnv(smallpox)
	if !ok {
		t.Errorf("smallpox release failed; world remains safe but LookupEnv is broken")
	}
}

// On Windows, Environ was observed to report keys with a single leading "=".
// Check that they are properly reported by LookupEnv and can be set by SetEnv.
// See https://golang.org/issue/49886.
func TestEnvironConsistency(t *testing.T) {
	for _, kv := range Environ() {
		i := strings.Index(kv, "=")
		if i == 0 {
			// We observe in practice keys with a single leading "=" on Windows.
			// TODO(#49886): Should we consume only the first leading "=" as part
			// of the key, or parse through arbitrarily many of them until a non-=,
			// or try each possible key/value boundary until LookupEnv succeeds?
			i = strings.Index(kv[1:], "=") + 1
		}
		if i < 0 {
			t.Errorf("Environ entry missing '=': %q", kv)
		}

k := kv[:i]
		v := kv[i+1:]
		v2, ok := LookupEnv(k)
		if ok && v == v2 {
			t.Logf("LookupEnv(%q) = %q, %t", k, v2, ok)
		} else {
			t.Errorf("Environ contains %q, but LookupEnv(%q) = %q, %t", kv, k, v2, ok)
		}

// Since k=v is already present in the environment,
		// setting it should be a no-op.
		if err := Setenv(k, v); err == nil {
			t.Logf("Setenv(%q, %q)", k, v)
		} else {
			t.Errorf("Environ contains %q, but SetEnv(%q, %q) = %q", kv, k, v, err)
		}
	}
}