Merge pull request #176 from sadielbartholomew/print-no-data-other-co…

…nstructs

Add inspection testing covering any construct lacking data

cfdm/test/test_Domain.py

@@ -42,12 +42,19 @@ def test_Domain__repr__str__dump(self):
         for title in (None, "title"):
             d.dump(display=False, _title=title)
 
-        # Test when dimension coordinate has no data
+        # Test when any construct which can have data in fact has no data.
         d = d.copy()
-        t = d.construct("time")
-        t.del_data()
-        self.assertFalse(t.has_data())
-        str(d)
+        for identity in [
+            "time",  # a dimension coordinate
+            "latitude",  # an auxiliary coordinate
+            "measure:area",  # a cell measure
+            "surface_altitude",  # a domain ancillary
+        ]:
+            c = d.construct(identity)  # get relevant construct, type as above
+            c.del_data()
+            self.assertFalse(c.has_data())
+            str(d)
+            repr(d)
 
     def test_Domain__init__(self):
         """Test the Domain constructor and source keyword."""

cfdm/test/test_Field.py

@@ -60,6 +60,21 @@ def test_Field__repr__str__dump_construct_type(self):
         self.assertIsInstance(f.dump(display=False), str)
         self.assertEqual(f.construct_type, "field")
 
+        # Test when any construct which can have data in fact has no data.
+        f = f.copy()
+        for identity in [
+            "time",  # a dimension coordinate
+            "latitude",  # an auxiliary coordinate
+            "measure:area",  # a cell measure
+            "surface_altitude",  # a domain ancillary,
+            "air_temperature standard_error",  # a field ancillary
+        ]:
+            c = f.construct(identity)  # get relevant construct, type as above
+            c.del_data()
+            self.assertFalse(c.has_data())
+            str(f)
+            repr(f)
+
     def test_Field__init__(self):
         """Test the Field constructor and source keyword."""
         cfdm.Field(source="qwerty")