Merge pull request #105 from astrobot/fix-pytest-plugins-import

Fix compatibility of conftest.py with Astropy 3.2

specsim/conftest.py

@@ -2,7 +2,19 @@
 # by importing them here in conftest.py they are discoverable by py.test
 # no matter how it is invoked within the source tree.
 
-from astropy.tests.pytest_plugins import *
+from astropy.version import version as astropy_version
+if astropy_version < '3.0':
+    # With older versions of Astropy, we actually need to import the pytest
+    # plugins themselves in order to make them discoverable by pytest.
+    from astropy.tests.pytest_plugins import *
+else:
+    # As of Astropy 3.0, the pytest plugins provided by Astropy are
+    # automatically made available when Astropy is installed. This means it's
+    # not necessary to import them here, but we still need to import global
+    # variables that are used for configuration.
+    from astropy.tests.plugins.display import PYTEST_HEADER_MODULES, TESTED_VERSIONS
+
+from astropy.tests.helper import enable_deprecations_as_exceptions
 
 ## Uncomment the following line to treat all DeprecationWarnings as
 ## exceptions