Fix bug in adding checksumAlgorithm triples

Closes one of #64

d1lod/d1lod/processors/processor.py

@@ -378,10 +378,12 @@ def process_checksum(self, subject, value, algorithm):
         else:
             raise ChecksumAlgorithmNotSupportedException(algorithm)
 
-        RDF.Statement(
-            checksum_bnode,
-            RDF.Node(RDF.Uri("http://spdx.org/rdf/terms#algorithm")),
-            RDF.Node(RDF.Uri(checksum_named_individual)),
+        self.model.append(
+            RDF.Statement(
+                checksum_bnode,
+                RDF.Node(RDF.Uri("http://spdx.org/rdf/terms#algorithm")),
+                RDF.Node(RDF.Uri(checksum_named_individual)),
+            )
         )
 
     # def lookup_person_in_store(self, last_name, email):

d1lod/tests/test_processor.py

@@ -0,0 +1,32 @@
+import RDF
+
+from d1lod.processors.processor import Processor
+
+from .conftest import load_metadata, load_sysmeta
+from d1lod.processors.util import model_has_statement
+
+
+def test_processor_sets_checksum_and_algorithm(client, model):
+    metadata = load_metadata("eml/eml-attribute-gym.xml")
+    sysmeta = load_sysmeta("eml-attribute-gym-sysmeta.xml")
+
+    processor = Processor(client, model, sysmeta, metadata, [])
+    processor.process()
+
+    assert model_has_statement(
+        processor.model,
+        RDF.Statement(
+            None,
+            RDF.Node(RDF.Uri("http://spdx.org/rdf/terms#algorithm")),
+            None,
+        ),
+    )
+
+    assert model_has_statement(
+        processor.model,
+        RDF.Statement(
+            None,
+            RDF.Node(RDF.Uri("http://spdx.org/rdf/terms#checksumValue")),
+            None,
+        ),
+    )