Run IO utils tests in test suite

test.py

@@ -227,6 +227,8 @@ def run_integration_tests(verbose=True):
     else:
         logging.info('all classes have integration tests')
 
+    run_test_suite("tests/integration/utils", "integration utils tests", verbose=verbose)
+
     # also test the validation script
     run_test_suite("tests/validation", "validation tests", verbose=verbose)
 

tests/integration/utils/test_io_utils.py

@@ -0,0 +1,30 @@
+"""Tests related to pynwb.io.utils."""
+import pytest
+
+from hdmf.build import GroupBuilder
+from pynwb.io.utils import get_nwb_version
+from pynwb.testing import TestCase
+
+
+class TestGetNWBVersion(TestCase):
+
+    def test_get_nwb_version(self):
+        """Get the NWB version from a builder."""
+        builder1 = GroupBuilder(name="root")
+        builder1.set_attribute(name="nwb_version", value="2.0.0")
+        builder2 = GroupBuilder(name="another")
+        builder1.set_group(builder2)
+        assert get_nwb_version(builder1) == (2, 0, 0)
+        assert get_nwb_version(builder2) == (2, 0, 0)
+
+    def test_get_nwb_version_missing(self):
+        """Get the NWB version from a builder where the root builder does not have an nwb_version attribute."""
+        builder1 = GroupBuilder(name="root")
+        builder2 = GroupBuilder(name="another")
+        builder1.set_group(builder2)
+
+        with pytest.raises(ValueError, match="'nwb_version' attribute is missing from the root of the NWB file."):
+            get_nwb_version(builder1)
+
+        with pytest.raises(ValueError, match="'nwb_version' attribute is missing from the root of the NWB file."):
+            get_nwb_version(builder1)