1 files changed, 63 insertions, 0 deletions
diff --git a/test/extractor/generic/test_constant.py b/test/extractor/generic/test_constant.py
new file mode 100644
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+++ b/test/extractor/generic/test_constant.py
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+"""
+
+Part of the bsie test suite.
+A copy of the license is provided with the project.
+Author: Matthias Baumgartner, 2022
+"""
+# imports
+import unittest
+
+# bsie imports
+from bsie.utils import ns
+from bsie.utils.node import Node
+
+# objects to test
+from bsie.extractor.generic.constant import Constant
+
+
+## code ##
+
+class TestConstant(unittest.TestCase):
+    def test_extract(self):
+        schema = '''
+            bse:author a bsfs:Predicate ;
+                rdfs:domain bsfs:Entity ;
+                rdfs:range xsd:string ;
+                owl:maxCardinality "1"^^xsd:number .
+
+            bse:comment a bsfs:Predicate ;
+                rdfs:domain bsfs:Entity ;
+                rdfs:range xsd:string ;
+                owl:maxCardinality "INF"^^xsd:number .
+
+            '''
+        tuples = [
+            (ns.bse.author, 'Me, myself, and I'),
+            (ns.bse.comment, 'the quick brown fox jumps over the lazy dog.'),
+            ]
+        node = Node(ns.bsfs.Entity, '') # Blank node
+        predicates = (ns.bse.author, ns.bse.comment)
+        ext = Constant(schema, tuples)
+        # baseline
+        self.assertSetEqual(set(ext.extract(node, None, predicates)),
+            {(node, pred, value) for pred, value in tuples})
+        # predicates is respected
+        self.assertSetEqual(set(ext.extract(node, None, (ns.bse.author, ns.bse.foobar))),
+            {(node, ns.bse.author, 'Me, myself, and I')})
+        self.assertSetEqual(set(ext.extract(node, None, (ns.bse.comment, ns.bse.foobar))),
+            {(node, ns.bse.comment, 'the quick brown fox jumps over the lazy dog.')})
+        self.assertSetEqual(set(ext.extract(node, None, (ns.bse.foobar, ns.bse.barfoo))), set())
+
+        # FIXME: should change!
+        # for now: no schema compliance
+        ext = Constant('', tuples)
+        self.assertSetEqual(set(ext.extract(node, None, predicates)),
+            {(node, pred, value) for pred, value in tuples})
+
+
+## main ##
+
+if __name__ == '__main__':
+    unittest.main()
+
+## EOF ##