Fixing pytest config to raise deprecations

Author: bsipocz

setup.cfg

@@ -17,9 +17,26 @@ minversion = 6.0
 norecursedirs = build docs/_build docs/gallery-examples
 doctest_plus = enabled
 text_file_format = rst
-addopts = -p no:warnings
 xfail_strict = true
 remote_data_strict = true
+filterwarnings =
+    error
+    ignore: Experimental:UserWarning:
+    ignore: The LCOGT archive:UserWarning:
+# This is a temporary measure, all of these should be fixed:
+    ignore::pytest.PytestUnraisableExceptionWarning
+    ignore::numpy.VisibleDeprecationWarning
+    ignore: unclosed file:ResourceWarning
+    ignore::UserWarning
+    ignore::astroquery.exceptions.InputWarning
+    ignore::astropy.utils.exceptions.AstropyDeprecationWarning
+    ignore::astropy.io.votable.exceptions.W50
+    ignore::astropy.io.votable.exceptions.W06
+    ignore::astropy.io.votable.exceptions.W03
+    ignore::astropy.io.votable.exceptions.W21
+    ignore::astropy.io.votable.exceptions.W42
+markers =
+    bigdata: marks tests that are expected to trigger a large download (deselect with '-m "not bigdata"')
 
 [ah_bootstrap]
 auto_use = True