tst: add single dicom and test for CSA header

Author: mgxd

tests/data/axasc35.dcm

@@ -0,0 +1,25 @@
+import os.path as op
+
+import pytest
+
+from heudiconv.external.pydicom import dcm
+from heudiconv.cli.run import main as runner
+from heudiconv.dicoms import parse_private_csa_header
+from .utils import TESTS_DATA_PATH
+
+# Public: Private DICOM tags
+DICOM_FIELDS_TO_TEST = {
+    'ProtocolName': 'tProtocolName'
+}
+
+def test_private_csa_header(tmpdir):
+    dcm_file = op.join(TESTS_DATA_PATH, 'axasc35.dcm')
+    dcm_data = dcm.read_file(dcm_file)
+    for pub, priv in DICOM_FIELDS_TO_TEST.items():
+        # ensure missing public tag
+        with pytest.raises(AttributeError):
+            dcm.pub
+        # ensure private tag is found
+        assert parse_private_csa_header(dcm_data, pub, priv) != ''
+        # and quickly run heudiconv with no conversion
+        runner(['--files', dcm_file, '-c' 'none', '-f', 'reproin'])