Add test

Author: stephenworsley

lib/iris/tests/unit/coords/test_Coord.py

@@ -839,5 +839,14 @@ def test_remove_bounds(self):
         self.assertFalse(coord.climatological)
 
 
+
+class Test_Coord_is_abstract(tests.IrisTest):
+    def test_instantiate_fail(self):
+        emsg = ("Can't instantiate abstract class Coord with abstract"
+                " methods __init__")
+        with self.assertRaisesRegex(TypeError, emsg):
+            coord = Coord(points=[0, 1])
+
+
 if __name__ == '__main__':
     tests.main()