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"""
Different implementations of the ``./setup.py test`` command depending on
what's locally available.
If Astropy v1.1.0.dev or later is available it should be possible to import
AstropyTest from ``astropy.tests.command``. If ``astropy`` can be imported
but not ``astropy.tests.command`` (i.e. an older version of Astropy), we can
use the backwards-compat implementation of the command.
If Astropy can't be imported at all then there is a skeleton implementation
that allows users to at least discover the ``./setup.py test`` command and
learn that they need Astropy to run it.
"""
# Previously these except statements caught only ImportErrors, but there are
# some other obscure exceptional conditions that can occur when importing
# astropy.tests (at least on older versions) that can cause these imports to
# fail
try:
import astropy
try:
from astropy.tests.command import AstropyTest
except Exception:
from ._test_compat import AstropyTest
except Exception:
# No astropy at all--provide the dummy implementation
from ._dummy import _DummyCommand
class AstropyTest(_DummyCommand):
command_name = 'test'
description = 'Run the tests for this package'
error_msg = (
"The 'test' command requires the astropy package to be "
"installed and importable.")
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