diff options
Diffstat (limited to 'nixos')
| -rw-r--r-- | nixos/lib/test-driver/test-driver.py | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/nixos/lib/test-driver/test-driver.py b/nixos/lib/test-driver/test-driver.py index 7b8d5803aa5..f4e2bb6100f 100644 --- a/nixos/lib/test-driver/test-driver.py +++ b/nixos/lib/test-driver/test-driver.py @@ -424,15 +424,18 @@ class Machine: output += out return output - def fail(self, *commands: str) -> None: + def fail(self, *commands: str) -> str: """Execute each command and check that it fails.""" + output = "" for command in commands: with self.nested("must fail: {}".format(command)): - status, output = self.execute(command) + (status, out) = self.execute(command) if status == 0: raise Exception( "command `{}` unexpectedly succeeded".format(command) ) + output += out + return output def wait_until_succeeds(self, command: str) -> str: """Wait until a command returns success and return its output. |