* add checks to ensure that name and default name args do not contain…

… slashes.

* include tests

src/hdmf/spec/spec.py

@@ -310,12 +310,16 @@ class BaseStorageSpec(Spec):
     def __init__(self, **kwargs):
         name, doc, quantity, attributes, linkable, data_type_def, data_type_inc = \
             getargs('name', 'doc', 'quantity', 'attributes', 'linkable', 'data_type_def', 'data_type_inc', kwargs)
+        if name is not None and "/" in name:
+            raise ValueError(f"Name '{name}' is invalid. Names of Groups and Datasets cannot contain '/'")
         if name is None and data_type_def is None and data_type_inc is None:
             raise ValueError("Cannot create Group or Dataset spec with no name "
                              "without specifying '%s' and/or '%s'." % (self.def_key(), self.inc_key()))
         super().__init__(doc, name=name)
         default_name = getargs('default_name', kwargs)
         if default_name:
+            if "/" in default_name:
+                raise ValueError(f"Default name '{default_name}' is invalid. Names of Groups and Datasets cannot contain '/'")
             if name is not None:
                 warn("found 'default_name' with 'name' - ignoring 'default_name'")
             else:

tests/unit/spec_tests/test_dataset_spec.py

@@ -261,3 +261,17 @@ def test_build_warn_extra_args(self):
                "'dtype': 'int', 'required': True}")
         with self.assertWarnsWith(UserWarning, msg):
             DatasetSpec.build_spec(spec_dict)
+
+    def test_constructor_validates_name(self):
+        with self.assertRaisesWith(
+                ValueError,
+                "Name 'one/two' is invalid. Names of Groups and Datasets cannot contain '/'",
+        ):
+            DatasetSpec(doc='my first dataset', dtype='int', name='one/two')
+
+    def test_constructor_validates_default_name(self):
+        with self.assertRaisesWith(
+                ValueError,
+                "Default name 'one/two' is invalid. Names of Groups and Datasets cannot contain '/'",
+        ):
+            DatasetSpec(doc='my first dataset', dtype='int', default_name='one/two', data_type_def='test')