micropython/tests/basics/errno1.py

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# test errno's and uerrno module
try:
import uerrno
except ImportError:
print("SKIP")
raise SystemExit
# check that constants exist and are integers
print(type(uerrno.EIO))
# check that errors are rendered in a nice way
msg = str(OSError(uerrno.EIO))
print(msg[:7], msg[-5:])
# check that unknown errno is still rendered
print(str(OSError(9999)))
# this tests a failed constant lookup in errno
errno = uerrno
print(errno.__name__)