|  | # Check for setting and removing one environment variable | 
|  | # | 
|  | # RUN: env A_FOO=999 -u FOO %{python} print_environment.py \ | 
|  | # RUN:   | FileCheck --check-prefix=CHECK-ENV-1 %s | 
|  | # | 
|  | # Check for setting/unsetting multiple environment variables | 
|  | # | 
|  | # RUN: env A_FOO=1 -u FOO B_BAR=2 -u BAR C_OOF=3 %{python} print_environment.py \ | 
|  | # RUN:   | FileCheck --check-prefix=CHECK-ENV-MULTIPLE %s | 
|  |  | 
|  | # CHECK-ENV-1: A_FOO = 999 | 
|  | # CHECK-ENV-1-NOT: FOO | 
|  |  | 
|  | # CHECK-ENV-MULTIPLE: A_FOO = 1 | 
|  | # CHECK-ENV-MULTIPLE-NOT: BAR | 
|  | # CHECK-ENV-MULTIPLE: B_BAR = 2 | 
|  | # CHECK-ENV-MULTIPLE: C_OOF = 3 | 
|  | # CHECK-ENV-MULTIPLE-NOT: FOO |