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1## Tests env command for preset variables and handling single/multiple unsets.2 3## Check and make sure preset environment variable were set in lit.cfg.4#5# RUN: env | FileCheck --check-prefix=CHECK-ENV-PRESET %s6#7## Check single unset of environment variable.8#9# RUN: env -u FOO | FileCheck --check-prefix=CHECK-ENV-UNSET-1 %s10#11## Check multiple unsets of environment variables.12#13# RUN: env -u FOO -u BAR | FileCheck --check-prefix=CHECK-ENV-UNSET-MULTIPLE %s14 15# CHECK-ENV-PRESET: BAR = 216# CHECK-ENV-PRESET: FOO = 117 18# CHECK-ENV-UNSET-1: BAR = 219# CHECK-ENV-UNSET-1-NOT: FOO20 21# CHECK-ENV-UNSET-MULTIPLE-NOT: BAR22# CHECK-ENV-UNSET-MULTIPLE-NOT: FOO23