Adding reg test for quantity cache issue

Author: bsipocz

astroquery/utils/tests/test_cache_remote.py

@@ -0,0 +1,26 @@
+# Licensed under a 3-clause BSD style license - see LICENSE.rst
+
+import pytest
+import shutil
+import tempfile
+
+from astroquery.mpc import MPC
+
+@pytest.mark.remote_data
+class TestRandomThings:
+
+    @pytest.fixture()
+    def temp_dir(self, request):
+        my_temp_dir = tempfile.mkdtemp()
+
+        def fin():
+            shutil.rmtree(my_temp_dir)
+        request.addfinalizer(fin)
+        return my_temp_dir
+
+    def test_quantity_hooks_cache(self, temp_dir):
+        # Regression test for #2294
+        mpc = MPC()
+        mpc.cache_location = temp_dir
+        mpc.get_observations(12893, cache=True)
+        mpc.get_observations(12894, cache=True)