Fetch in graph including results view

2 files changed, 483 insertions, 4 deletions

diff --git a/test/graph/test_nodes.py b/test/graph/test_nodes.py
index 2870f35..a4e07ee 100644
--- a/test/graph/test_nodes.py
+++ b/test/graph/test_nodes.py
@@ -9,8 +9,8 @@ import rdflib
 import unittest
 
 # bsie imports
-from bsfs import schema as _schema
-from bsfs.namespace import ns
+from bsfs import schema as bsc
+from bsfs.namespace import Namespace, ns
 from bsfs.triple_store.sparql import SparqlStore
 from bsfs.utils import errors, URI
 
@@ -20,11 +20,13 @@ from bsfs.graph.nodes import Nodes
 
 ## code ##
 
+bst = Namespace('http://bsfs.ai/schema/Tag')
+
 class TestNodes(unittest.TestCase):
     def setUp(self):
         # initialize backend
         self.backend = SparqlStore()
-        self.backend.schema = _schema.from_string('''
+        self.backend.schema = bsc.from_string('''
             prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>
             prefix xsd: <http://www.w3.org/2001/XMLSchema#>
 
@@ -67,6 +69,11 @@ class TestNodes(unittest.TestCase):
                 rdfs:range bsfs:User ;
                 bsfs:unique "true"^^xsd:boolean .
 
+            bst:label rdfs:subClassOf bsfs:Predicate ;
+                rdfs:domain bsfs:Tag ;
+                rdfs:range xsd:string ;
+                bsfs:unique "true"^^xsd:boolean .
+
             bst:representative rdfs:subClassOf bsfs:Predicate ;
                 rdfs:domain bsfs:Tag ;
                 rdfs:range bsfs:Entity ;
@@ -89,7 +96,8 @@ class TestNodes(unittest.TestCase):
             (rdflib.URIRef(ns.bse.filesize), rdflib.RDFS.subClassOf, rdflib.URIRef(ns.bsfs.Predicate)),
             (rdflib.URIRef(ns.bse.tag), rdflib.RDFS.subClassOf, rdflib.URIRef(ns.bsfs.Predicate)),
             (rdflib.URIRef(ns.bse.author), rdflib.RDFS.subClassOf, rdflib.URIRef(ns.bsfs.Predicate)),
-            (rdflib.URIRef('http://bsfs.ai/schema/Tag#representative'), rdflib.RDFS.subClassOf, rdflib.URIRef(ns.bsfs.Predicate)),
+            (rdflib.URIRef(bst.representative), rdflib.RDFS.subClassOf, rdflib.URIRef(ns.bsfs.Predicate)),
+            (rdflib.URIRef(bst.label), rdflib.RDFS.subClassOf, rdflib.URIRef(ns.bsfs.Predicate)),
             }
         # Nodes constructor args
         self.user = URI('http://example.com/me')
@@ -371,6 +379,85 @@ class TestNodes(unittest.TestCase):
             (self.p_author.uri, Nodes(self.backend, self.user, self.user_type, {URI('http://example.com/me/user#1234'), URI('http://example.com/me/user#4321')}))))
         self.assertSetEqual(curr, set(self.backend._graph))
 
+    def test_fetch(self):
+        # setup: add some instances
+        Nodes(self.backend, self.user, self.ent_type, {'http://example.com/me/entity#1234'}) \
+            .set(ns.bse.comment, 'hello world') \
+            .set(ns.bse.filesize, 1234) \
+            .set(ns.bse.tag, Nodes(self.backend, self.user, self.tag_type, {'http://example.com/me/tag#1234'}))
+        Nodes(self.backend, self.user, self.ent_type, {'http://example.com/me/entity#4321'}) \
+            .set(ns.bse.filesize, 4321) \
+            .set(ns.bse.tag, Nodes(self.backend, self.user, self.tag_type, {'http://example.com/me/tag#4321'}))
+        Nodes(self.backend, self.user, self.tag_type, {'http://example.com/me/tag#1234'}) \
+            .set(bst.label, 'tag_label_1234')
+        Nodes(self.backend, self.user, self.tag_type, {'http://example.com/me/tag#4321'}) \
+            .set(bst.label, 'tag_label_4321')
+        # setup: get nodes instance
+        nodes = Nodes(self.backend, self.user, self.ent_type, self.ent_ids)
+        # must pass at least one path
+        self.assertRaises(AttributeError, nodes.get)
+        # view must be list or dict
+        self.assertRaises(ValueError, nodes.get, ns.bse.filesize, view='hello')
+        self.assertRaises(ValueError, nodes.get, ns.bse.filesize, view=1234)
+        self.assertRaises(ValueError, nodes.get, ns.bse.filesize, view=tuple)
+        # can pass path as URI
+        self.assertDictEqual(nodes.get(ns.bse.filesize), {
+            Nodes(self.backend, self.user, self.ent_type, {'http://example.com/me/entity#1234'}): 1234,
+            Nodes(self.backend, self.user, self.ent_type, {'http://example.com/me/entity#4321'}): 4321,
+            })
+        # can pass path as sequence of URI
+        self.assertDictEqual(nodes.get((ns.bse.tag, bst.label)), {
+            Nodes(self.backend, self.user, self.ent_type, {'http://example.com/me/entity#1234'}): {'tag_label_1234'},
+            Nodes(self.backend, self.user, self.ent_type, {'http://example.com/me/entity#4321'}): {'tag_label_4321'},
+            })
+        # get returns the same path that was passed
+        self.assertCountEqual(list(nodes.get((ns.bse.tag, bst.label), path=False, view=list)), [
+            (Nodes(self.backend, self.user, self.ent_type, {'http://example.com/me/entity#1234'}), (ns.bse.tag, bst.label), 'tag_label_1234'),
+            (Nodes(self.backend, self.user, self.ent_type, {'http://example.com/me/entity#4321'}), (ns.bse.tag, bst.label), 'tag_label_4321'),
+            ])
+        self.assertCountEqual(list(nodes.get([ns.bse.tag, bst.label], path=False, view=list)), [
+            (Nodes(self.backend, self.user, self.ent_type, {'http://example.com/me/entity#1234'}), [ns.bse.tag, bst.label], 'tag_label_1234'),
+            (Nodes(self.backend, self.user, self.ent_type, {'http://example.com/me/entity#4321'}), [ns.bse.tag, bst.label], 'tag_label_4321'),
+            ])
+        # paths must be URI or sequence thereof
+        self.assertRaises(TypeError, nodes.get, 1234)
+        self.assertRaises(TypeError, nodes.get, (ns.bse.tag, 1234))
+        self.assertRaises(TypeError, nodes.get, (1234, ns.bse.tag))
+        self.assertRaises(errors.ConsistencyError, nodes.get, 'hello world')
+        self.assertRaises(errors.ConsistencyError, nodes.get, ns.bse.invalid)
+        self.assertRaises(errors.ConsistencyError, nodes.get, (ns.bse.tag, bst.invalid))
+        # can pass multiple paths
+        self.assertDictEqual(nodes.get(ns.bse.filesize, (ns.bse.tag, bst.label)), {
+            Nodes(self.backend, self.user, self.ent_type, {'http://example.com/me/entity#1234'}): {
+                ns.bse.filesize: 1234,
+                (ns.bse.tag, bst.label): {'tag_label_1234'},
+                },
+            Nodes(self.backend, self.user, self.ent_type, {'http://example.com/me/entity#4321'}): {
+                ns.bse.filesize: 4321,
+                (ns.bse.tag, bst.label): {'tag_label_4321'},
+                },
+            })
+        # get respects view
+        self.assertDictEqual(nodes.get(ns.bse.filesize, view=dict), {
+            Nodes(self.backend, self.user, self.ent_type, {'http://example.com/me/entity#1234'}): 1234,
+            Nodes(self.backend, self.user, self.ent_type, {'http://example.com/me/entity#4321'}): 4321,
+            })
+        self.assertSetEqual(set(nodes.get(ns.bse.filesize, view=list)), {
+            (Nodes(self.backend, self.user, self.ent_type, {'http://example.com/me/entity#1234'}), 1234),
+            (Nodes(self.backend, self.user, self.ent_type, {'http://example.com/me/entity#4321'}), 4321),
+            })
+        # get returns Nodes instance when fetching a node
+        self.assertDictEqual(nodes.get(ns.bse.tag), {
+            Nodes(self.backend, self.user, self.ent_type, {'http://example.com/me/entity#1234'}):
+                {Nodes(self.backend, self.user, self.tag_type, {'http://example.com/me/tag#1234'})},
+            Nodes(self.backend, self.user, self.ent_type, {'http://example.com/me/entity#4321'}):
+                {Nodes(self.backend, self.user, self.tag_type, {'http://example.com/me/tag#4321'})},
+            })
+        # get returns a value when fetching a value and omits missing values
+        self.assertDictEqual(nodes.get(ns.bse.comment), {
+            Nodes(self.backend, self.user, self.ent_type, {'http://example.com/me/entity#1234'}): {'hello world'},
+            })
+
 
 ## main ##
 
diff --git a/test/graph/test_result.py b/test/graph/test_result.py
new file mode 100644
index 0000000..89b0da1
--- /dev/null
+++ b/test/graph/test_result.py
@@ -0,0 +1,392 @@
+"""
+
+Part of the bsfs test suite.
+A copy of the license is provided with the project.
+Author: Matthias Baumgartner, 2022
+"""
+# imports
+import unittest
+
+# bsie imports
+from bsfs import schema as bsc
+from bsfs.namespace import ns
+from bsfs.utils import URI
+
+# objects to test
+from bsfs.graph.result import to_list_view, to_dict_view
+
+
+## code ##
+
+class TestListView(unittest.TestCase):
+    def setUp(self):
+        self.triples_111 = [('ent#1234', ns.bse.iso, 123)]
+        self.triples_11U = [('ent#1234', ns.bse.tag, 'tag#1234'),
+                            ('ent#1234', ns.bse.tag, 'tag#5678')]
+        self.triples_1M1 = [('ent#1234', ns.bse.iso, 123),
+                            ('ent#1234', ns.bse.t_created, '2010-01-02')]
+        self.triples_1MU = [('ent#1234', ns.bse.iso, 123),
+                            ('ent#1234', ns.bse.tag, 'tag#1234'),
+                            ('ent#1234', ns.bse.tag, 'tag#5678')]
+        self.triples_N11 = [('ent#1234', ns.bse.iso, 123),
+                            ('ent#4321', ns.bse.iso, 321)]
+        self.triples_N1U = [('ent#1234', ns.bse.tag, 'tag#1234'),
+                            ('ent#1234', ns.bse.tag, 'tag#5678'),
+                            ('ent#4321', ns.bse.tag, 'tag#4321')]
+        self.triples_NM1 = [('ent#1234', ns.bse.iso, 123),
+                            ('ent#1234', ns.bse.t_created, '2010-01-02'),
+                            ('ent#4321', ns.bse.iso, 321),
+                            ('ent#4321', ns.bse.t_created, '2022-02-22')]
+        self.triples_NMU = [('ent#1234', ns.bse.iso, 123),
+                            ('ent#1234', ns.bse.tag, 'tag#1234'),
+                            ('ent#1234', ns.bse.tag, 'tag#5678'),
+                            ('ent#4321', ns.bse.iso, 321),
+                            ('ent#4321', ns.bse.t_created, '2022-02-22')]
+
+    def test_copy(self):
+        # iterator yields tuples
+        self.assertIsInstance(list(to_list_view([('subject', 'predicate', 'object')], node=False, path=False, value=False))[0], tuple)
+        # components are not changed
+        class Foo(): pass
+        foo = Foo()
+        self.assertListEqual(list(to_list_view([('subject', 'predicate', 'object')], node=False, path=False, value=False)),
+            [('subject', 'predicate', 'object')])
+        self.assertListEqual(list(to_list_view([(foo, 'predicate', 'object')], node=False, path=False, value=False)),
+            [(foo, 'predicate', 'object')])
+        self.assertListEqual(list(to_list_view([('subject', foo, 'object')], node=False, path=False, value=False)),
+            [('subject', foo, 'object')])
+        self.assertListEqual(list(to_list_view([('subject', 'predicate', foo)], node=False, path=False, value=False)),
+            [('subject', 'predicate', foo)])
+
+    def test_agg_none(self):
+        self.assertListEqual(list(to_list_view(self.triples_111, node=False, path=False, value=False)), self.triples_111)
+        self.assertListEqual(list(to_list_view(self.triples_11U, node=False, path=False, value=False)), self.triples_11U)
+        self.assertListEqual(list(to_list_view(self.triples_1M1, node=False, path=False, value=False)), self.triples_1M1)
+        self.assertListEqual(list(to_list_view(self.triples_1MU, node=False, path=False, value=False)), self.triples_1MU)
+        self.assertListEqual(list(to_list_view(self.triples_N11, node=False, path=False, value=False)), self.triples_N11)
+        self.assertListEqual(list(to_list_view(self.triples_N1U, node=False, path=False, value=False)), self.triples_N1U)
+        self.assertListEqual(list(to_list_view(self.triples_NM1, node=False, path=False, value=False)), self.triples_NM1)
+        self.assertListEqual(list(to_list_view(self.triples_NMU, node=False, path=False, value=False)), self.triples_NMU)
+
+    def test_agg_node(self):
+        self.assertListEqual(list(to_list_view(self.triples_111, node=True, path=False, value=False)),
+            [(ns.bse.iso, 123)])
+        self.assertListEqual(list(to_list_view(self.triples_11U, node=True, path=False, value=False)),
+            [(ns.bse.tag, 'tag#1234'), (ns.bse.tag, 'tag#5678')])
+        self.assertListEqual(list(to_list_view(self.triples_1M1, node=True, path=False, value=False)),
+            [(ns.bse.iso, 123), (ns.bse.t_created, '2010-01-02')])
+        self.assertListEqual(list(to_list_view(self.triples_1MU, node=True, path=False, value=False)),
+            [(ns.bse.iso, 123), (ns.bse.tag, 'tag#1234'), (ns.bse.tag, 'tag#5678')])
+        self.assertListEqual(list(to_list_view(self.triples_N11, node=True, path=False, value=False)),
+            [(ns.bse.iso, 123), (ns.bse.iso, 321)])
+        self.assertListEqual(list(to_list_view(self.triples_N1U, node=True, path=False, value=False)),
+            [(ns.bse.tag, 'tag#1234'), (ns.bse.tag, 'tag#5678'), (ns.bse.tag, 'tag#4321')])
+        self.assertListEqual(list(to_list_view(self.triples_NM1, node=True, path=False, value=False)),
+            [(ns.bse.iso, 123), (ns.bse.t_created, '2010-01-02'), (ns.bse.iso, 321), (ns.bse.t_created, '2022-02-22')])
+        self.assertListEqual(list(to_list_view(self.triples_NMU, node=True, path=False, value=False)),
+            [(ns.bse.iso, 123), (ns.bse.tag, 'tag#1234'), (ns.bse.tag, 'tag#5678'), (ns.bse.iso, 321), (ns.bse.t_created, '2022-02-22')])
+
+    def test_agg_path(self):
+        self.assertListEqual(list(to_list_view(self.triples_111, node=False, path=True, value=False)),
+            [('ent#1234', 123)])
+        self.assertListEqual(list(to_list_view(self.triples_11U, node=False, path=True, value=False)),
+            [('ent#1234', 'tag#1234'), ('ent#1234', 'tag#5678')])
+        self.assertListEqual(list(to_list_view(self.triples_1M1, node=False, path=True, value=False)),
+            [('ent#1234', 123), ('ent#1234', '2010-01-02')])
+        self.assertListEqual(list(to_list_view(self.triples_1MU, node=False, path=True, value=False)),
+            [('ent#1234', 123), ('ent#1234', 'tag#1234'), ('ent#1234', 'tag#5678')])
+        self.assertListEqual(list(to_list_view(self.triples_N11, node=False, path=True, value=False)),
+            [('ent#1234', 123), ('ent#4321', 321)])
+        self.assertListEqual(list(to_list_view(self.triples_N1U, node=False, path=True, value=False)),
+            [('ent#1234', 'tag#1234'), ('ent#1234', 'tag#5678'), ('ent#4321', 'tag#4321')])
+        self.assertListEqual(list(to_list_view(self.triples_NM1, node=False, path=True, value=False)),
+            [('ent#1234', 123), ('ent#1234', '2010-01-02'), ('ent#4321', 321), ('ent#4321', '2022-02-22')])
+        self.assertListEqual(list(to_list_view(self.triples_NMU, node=False, path=True, value=False)),
+            [('ent#1234', 123), ('ent#1234', 'tag#1234'), ('ent#1234', 'tag#5678'), ('ent#4321', 321), ('ent#4321', '2022-02-22')])
+
+    def test_agg_node_path(self):
+        self.assertListEqual(list(to_list_view(self.triples_111, node=True, path=True, value=False)),
+            [123])
+        self.assertListEqual(list(to_list_view(self.triples_11U, node=True, path=True, value=False)),
+            ['tag#1234', 'tag#5678'])
+        self.assertListEqual(list(to_list_view(self.triples_1M1, node=True, path=True, value=False)),
+            [123, '2010-01-02'])
+        self.assertListEqual(list(to_list_view(self.triples_1MU, node=True, path=True, value=False)),
+            [123, 'tag#1234', 'tag#5678'])
+        self.assertListEqual(list(to_list_view(self.triples_N11, node=True, path=True, value=False)),
+            [123, 321])
+        self.assertListEqual(list(to_list_view(self.triples_N1U, node=True, path=True, value=False)),
+            ['tag#1234', 'tag#5678', 'tag#4321'])
+        self.assertListEqual(list(to_list_view(self.triples_NM1, node=True, path=True, value=False)),
+            [123, '2010-01-02', 321, '2022-02-22'])
+        self.assertListEqual(list(to_list_view(self.triples_NMU, node=True, path=True, value=False)),
+            [123, 'tag#1234', 'tag#5678', 321, '2022-02-22'])
+
+    def test_agg_value(self):
+        # value flag has no effect
+        self.assertListEqual(list(to_list_view(self.triples_111, node=False, path=False, value=False)), self.triples_111)
+        self.assertListEqual(list(to_list_view(self.triples_11U, node=False, path=False, value=False)), self.triples_11U)
+        self.assertListEqual(list(to_list_view(self.triples_1M1, node=False, path=False, value=False)), self.triples_1M1)
+        self.assertListEqual(list(to_list_view(self.triples_1MU, node=False, path=False, value=False)), self.triples_1MU)
+        self.assertListEqual(list(to_list_view(self.triples_N11, node=False, path=False, value=False)), self.triples_N11)
+        self.assertListEqual(list(to_list_view(self.triples_N1U, node=False, path=False, value=False)), self.triples_N1U)
+        self.assertListEqual(list(to_list_view(self.triples_NM1, node=False, path=False, value=False)), self.triples_NM1)
+        self.assertListEqual(list(to_list_view(self.triples_NMU, node=False, path=False, value=False)), self.triples_NMU)
+
+    def test_agg_node_value(self):
+        # value flag has no effect -> same test as test_agg_node
+        self.assertListEqual(list(to_list_view(self.triples_111, node=True, path=False, value=True)),
+            [(ns.bse.iso, 123)])
+        self.assertListEqual(list(to_list_view(self.triples_11U, node=True, path=False, value=True)),
+            [(ns.bse.tag, 'tag#1234'), (ns.bse.tag, 'tag#5678')])
+        self.assertListEqual(list(to_list_view(self.triples_1M1, node=True, path=False, value=True)),
+            [(ns.bse.iso, 123), (ns.bse.t_created, '2010-01-02')])
+        self.assertListEqual(list(to_list_view(self.triples_1MU, node=True, path=False, value=True)),
+            [(ns.bse.iso, 123), (ns.bse.tag, 'tag#1234'), (ns.bse.tag, 'tag#5678')])
+        self.assertListEqual(list(to_list_view(self.triples_N11, node=True, path=False, value=True)),
+            [(ns.bse.iso, 123), (ns.bse.iso, 321)])
+        self.assertListEqual(list(to_list_view(self.triples_N1U, node=True, path=False, value=True)),
+            [(ns.bse.tag, 'tag#1234'), (ns.bse.tag, 'tag#5678'), (ns.bse.tag, 'tag#4321')])
+        self.assertListEqual(list(to_list_view(self.triples_NM1, node=True, path=False, value=True)),
+            [(ns.bse.iso, 123), (ns.bse.t_created, '2010-01-02'), (ns.bse.iso, 321), (ns.bse.t_created, '2022-02-22')])
+        self.assertListEqual(list(to_list_view(self.triples_NMU, node=True, path=False, value=True)),
+            [(ns.bse.iso, 123), (ns.bse.tag, 'tag#1234'), (ns.bse.tag, 'tag#5678'), (ns.bse.iso, 321), (ns.bse.t_created, '2022-02-22')])
+
+    def test_agg_path_value(self):
+        # value flag has no effect -> same test as test_agg_path
+        self.assertListEqual(list(to_list_view(self.triples_111, node=False, path=True, value=True)),
+            [('ent#1234', 123)])
+        self.assertListEqual(list(to_list_view(self.triples_11U, node=False, path=True, value=True)),
+            [('ent#1234', 'tag#1234'), ('ent#1234', 'tag#5678')])
+        self.assertListEqual(list(to_list_view(self.triples_1M1, node=False, path=True, value=True)),
+            [('ent#1234', 123), ('ent#1234', '2010-01-02')])
+        self.assertListEqual(list(to_list_view(self.triples_1MU, node=False, path=True, value=True)),
+            [('ent#1234', 123), ('ent#1234', 'tag#1234'), ('ent#1234', 'tag#5678')])
+        self.assertListEqual(list(to_list_view(self.triples_N11, node=False, path=True, value=True)),
+            [('ent#1234', 123), ('ent#4321', 321)])
+        self.assertListEqual(list(to_list_view(self.triples_N1U, node=False, path=True, value=True)),
+            [('ent#1234', 'tag#1234'), ('ent#1234', 'tag#5678'), ('ent#4321', 'tag#4321')])
+        self.assertListEqual(list(to_list_view(self.triples_NM1, node=False, path=True, value=True)),
+            [('ent#1234', 123), ('ent#1234', '2010-01-02'), ('ent#4321', 321), ('ent#4321', '2022-02-22')])
+        self.assertListEqual(list(to_list_view(self.triples_NMU, node=False, path=True, value=True)),
+            [('ent#1234', 123), ('ent#1234', 'tag#1234'), ('ent#1234', 'tag#5678'), ('ent#4321', 321), ('ent#4321', '2022-02-22')])
+
+    def test_agg_all(self):
+        # value flag has no effect -> same test as test_agg_node_path
+        self.assertListEqual(list(to_list_view(self.triples_111, node=True, path=True, value=True)),
+            [123])
+        self.assertListEqual(list(to_list_view(self.triples_11U, node=True, path=True, value=True)),
+            ['tag#1234', 'tag#5678'])
+        self.assertListEqual(list(to_list_view(self.triples_1M1, node=True, path=True, value=True)),
+            [123, '2010-01-02'])
+        self.assertListEqual(list(to_list_view(self.triples_1MU, node=True, path=True, value=True)),
+            [123, 'tag#1234', 'tag#5678'])
+        self.assertListEqual(list(to_list_view(self.triples_N11, node=True, path=True, value=True)),
+            [123, 321])
+        self.assertListEqual(list(to_list_view(self.triples_N1U, node=True, path=True, value=True)),
+            ['tag#1234', 'tag#5678', 'tag#4321'])
+        self.assertListEqual(list(to_list_view(self.triples_NM1, node=True, path=True, value=True)),
+            [123, '2010-01-02', 321, '2022-02-22'])
+        self.assertListEqual(list(to_list_view(self.triples_NMU, node=True, path=True, value=True)),
+            [123, 'tag#1234', 'tag#5678', 321, '2022-02-22'])
+
+
+class TestDictView(unittest.TestCase):
+    def setUp(self):
+        self.unique_paths = {ns.bse.iso, ns.bse.t_created}
+        self.triples_111 = [('ent#1234', ns.bse.iso, 123)]
+        self.triples_11U = [('ent#1234', ns.bse.tag, 'tag#1234'),
+                            ('ent#1234', ns.bse.tag, 'tag#5678')]
+        self.triples_1M1 = [('ent#1234', ns.bse.iso, 123),
+                            ('ent#1234', ns.bse.t_created, '2010-01-02')]
+        self.triples_1MU = [('ent#1234', ns.bse.iso, 123),
+                            ('ent#1234', ns.bse.tag, 'tag#1234'),
+                            ('ent#1234', ns.bse.tag, 'tag#5678')]
+        self.triples_N11 = [('ent#1234', ns.bse.iso, 123),
+                            ('ent#4321', ns.bse.iso, 321)]
+        self.triples_N1U = [('ent#1234', ns.bse.tag, 'tag#1234'),
+                            ('ent#1234', ns.bse.tag, 'tag#5678'),
+                            ('ent#4321', ns.bse.tag, 'tag#4321')]
+        self.triples_NM1 = [('ent#1234', ns.bse.iso, 123),
+                            ('ent#1234', ns.bse.t_created, '2010-01-02'),
+                            ('ent#4321', ns.bse.iso, 321),
+                            ('ent#4321', ns.bse.t_created, '2022-02-22')]
+        self.triples_NMU = [('ent#1234', ns.bse.iso, 123),
+                            ('ent#1234', ns.bse.tag, 'tag#1234'),
+                            ('ent#1234', ns.bse.tag, 'tag#5678'),
+                            ('ent#4321', ns.bse.iso, 321),
+                            ('ent#4321', ns.bse.t_created, '2022-02-22')]
+
+    def test_errounous_call(self):
+        # return set instead of value
+        self.assertSetEqual(to_dict_view(self.triples_111, one_node=False, one_path=True,  unique_paths=self.unique_paths, node=True, path=True, value=True),
+            {123})
+        self.assertSetEqual(to_dict_view(self.triples_111, one_node=True,  one_path=False, unique_paths=self.unique_paths, node=True, path=True, value=True),
+            {123})
+        # one_node mismatch: return set of values instead of value
+        self.assertDictEqual(to_dict_view(self.triples_111, one_node=False, one_path=True, unique_paths=self.unique_paths, node=True, path=False, value=True),
+            {ns.bse.iso: {123}})
+        # one_path mismatch: return set of values instead of value
+        self.assertDictEqual(to_dict_view(self.triples_111, one_node=True, one_path=False, unique_paths=self.unique_paths, node=False, path=True, value=True),
+            {'ent#1234': {123}})
+        # unique_paths mismatch: return set of values instead of value
+        self.assertSetEqual(to_dict_view(self.triples_111, one_node=True, one_path=False, unique_paths={}, node=True, path=True, value=True),
+            {123})
+        self.assertDictEqual(to_dict_view(self.triples_111, one_node=True, one_path=False, unique_paths={}, node=True, path=False, value=True),
+            {ns.bse.iso: {123}})
+        self.assertDictEqual(to_dict_view(self.triples_111, one_node=True, one_path=False, unique_paths={}, node=False, path=True, value=True),
+            {'ent#1234': {123}})
+        self.assertDictEqual(to_dict_view(self.triples_111, one_node=True, one_path=False, unique_paths={}, node=False, path=False, value=True),
+            {'ent#1234': {ns.bse.iso: {123}}})
+
+    def test_agg_none(self):
+        self.assertDictEqual(to_dict_view(self.triples_111, one_node=True,  one_path=True,  unique_paths=self.unique_paths, node=False, path=False, value=False),
+            {'ent#1234': {ns.bse.iso: {123}}})
+        self.assertDictEqual(to_dict_view(self.triples_11U, one_node=True,  one_path=True,  unique_paths=self.unique_paths, node=False, path=False, value=False),
+            {'ent#1234': {ns.bse.tag: {'tag#1234', 'tag#5678'}}})
+        self.assertDictEqual(to_dict_view(self.triples_1M1, one_node=True,  one_path=False, unique_paths=self.unique_paths, node=False, path=False, value=False),
+            {'ent#1234': {ns.bse.iso: {123}, ns.bse.t_created: {'2010-01-02'}}})
+        self.assertDictEqual(to_dict_view(self.triples_1MU, one_node=True,  one_path=False, unique_paths=self.unique_paths, node=False, path=False, value=False),
+            {'ent#1234': {ns.bse.iso: {123}, ns.bse.tag: {'tag#1234', 'tag#5678'}}})
+        self.assertDictEqual(to_dict_view(self.triples_N11, one_node=False, one_path=True,  unique_paths=self.unique_paths, node=False, path=False, value=False),
+            {'ent#1234': {ns.bse.iso: {123}}, 'ent#4321': {ns.bse.iso: {321}}})
+        self.assertDictEqual(to_dict_view(self.triples_N1U, one_node=False, one_path=True,  unique_paths=self.unique_paths, node=False, path=False, value=False),
+            {'ent#1234': {ns.bse.tag: {'tag#1234', 'tag#5678'}}, 'ent#4321': {ns.bse.tag: {'tag#4321'}}})
+        self.assertDictEqual(to_dict_view(self.triples_NM1, one_node=False, one_path=False, unique_paths=self.unique_paths, node=False, path=False, value=False),
+            {'ent#1234': {ns.bse.iso: {123}, ns.bse.t_created: {'2010-01-02'}}, 'ent#4321': {ns.bse.iso: {321}, ns.bse.t_created: {'2022-02-22'}}})
+        self.assertDictEqual(to_dict_view(self.triples_NMU, one_node=False, one_path=False, unique_paths=self.unique_paths, node=False, path=False, value=False),
+            {'ent#1234': {ns.bse.iso: {123}, ns.bse.tag: {'tag#1234', 'tag#5678'}}, 'ent#4321': {ns.bse.iso: {321}, ns.bse.t_created: {'2022-02-22'}}})
+
+    def test_agg_node(self):
+        self.assertDictEqual(to_dict_view(self.triples_111, one_node=True,  one_path=True,  unique_paths=self.unique_paths, node=True, path=False, value=False),
+            {ns.bse.iso: {123}})
+        self.assertDictEqual(to_dict_view(self.triples_11U, one_node=True,  one_path=True,  unique_paths=self.unique_paths, node=True, path=False, value=False),
+            {ns.bse.tag: {'tag#1234', 'tag#5678'}})
+        self.assertDictEqual(to_dict_view(self.triples_1M1, one_node=True,  one_path=False, unique_paths=self.unique_paths, node=True, path=False, value=False),
+            {ns.bse.iso: {123}, ns.bse.t_created: {'2010-01-02'}})
+        self.assertDictEqual(to_dict_view(self.triples_1MU, one_node=True,  one_path=False, unique_paths=self.unique_paths, node=True, path=False, value=False),
+            {ns.bse.iso: {123}, ns.bse.tag: {'tag#1234', 'tag#5678'}})
+        self.assertDictEqual(to_dict_view(self.triples_N11, one_node=False, one_path=True,  unique_paths=self.unique_paths, node=True, path=False, value=False),
+            {ns.bse.iso: {123, 321}})
+        self.assertDictEqual(to_dict_view(self.triples_N1U, one_node=False, one_path=True,  unique_paths=self.unique_paths, node=True, path=False, value=False),
+            {ns.bse.tag: {'tag#1234', 'tag#5678', 'tag#4321'}})
+        self.assertDictEqual(to_dict_view(self.triples_NM1, one_node=False, one_path=False, unique_paths=self.unique_paths, node=True, path=False, value=False),
+            {ns.bse.iso: {123, 321}, ns.bse.t_created: {'2010-01-02', '2022-02-22'}})
+        self.assertDictEqual(to_dict_view(self.triples_NMU, one_node=False, one_path=False, unique_paths=self.unique_paths, node=True, path=False, value=False),
+            {ns.bse.iso: {123, 321}, ns.bse.tag: {'tag#1234', 'tag#5678'}, ns.bse.t_created: {'2022-02-22'}})
+
+    def test_agg_path(self):
+        self.assertDictEqual(to_dict_view(self.triples_111, one_node=True,  one_path=True,  unique_paths=self.unique_paths, node=False, path=True, value=False),
+            {'ent#1234': {123}})
+        self.assertDictEqual(to_dict_view(self.triples_11U, one_node=True,  one_path=True,  unique_paths=self.unique_paths, node=False, path=True, value=False),
+            {'ent#1234': {'tag#1234', 'tag#5678'}})
+        self.assertDictEqual(to_dict_view(self.triples_1M1, one_node=True,  one_path=False, unique_paths=self.unique_paths, node=False, path=True, value=False),
+            {'ent#1234': {123, '2010-01-02'}})
+        self.assertDictEqual(to_dict_view(self.triples_1MU, one_node=True,  one_path=False, unique_paths=self.unique_paths, node=False, path=True, value=False),
+            {'ent#1234': {123, 'tag#1234', 'tag#5678'}})
+        self.assertDictEqual(to_dict_view(self.triples_N11, one_node=False, one_path=True,  unique_paths=self.unique_paths, node=False, path=True, value=False),
+            {'ent#1234': {123}, 'ent#4321': {321}})
+        self.assertDictEqual(to_dict_view(self.triples_N1U, one_node=False, one_path=True,  unique_paths=self.unique_paths, node=False, path=True, value=False),
+            {'ent#1234': {'tag#1234', 'tag#5678'}, 'ent#4321': {'tag#4321'}})
+        self.assertDictEqual(to_dict_view(self.triples_NM1, one_node=False, one_path=False, unique_paths=self.unique_paths, node=False, path=True, value=False),
+            {'ent#1234': {123, '2010-01-02'}, 'ent#4321': {321, '2022-02-22'}})
+        self.assertDictEqual(to_dict_view(self.triples_NMU, one_node=False, one_path=False, unique_paths=self.unique_paths, node=False, path=True, value=False),
+            {'ent#1234': {123, 'tag#1234', 'tag#5678'}, 'ent#4321': {321, '2022-02-22'}})
+
+    def test_agg_node_path(self):
+        self.assertSetEqual(to_dict_view(self.triples_111, one_node=True,  one_path=True,  unique_paths=self.unique_paths, node=True, path=True, value=False),
+            {123})
+        self.assertSetEqual(to_dict_view(self.triples_11U, one_node=True,  one_path=True,  unique_paths=self.unique_paths, node=True, path=True, value=False),
+            {'tag#1234', 'tag#5678'})
+        self.assertSetEqual(to_dict_view(self.triples_1M1, one_node=True,  one_path=False, unique_paths=self.unique_paths, node=True, path=True, value=False),
+            {123, '2010-01-02'})
+        self.assertSetEqual(to_dict_view(self.triples_1MU, one_node=True,  one_path=False, unique_paths=self.unique_paths, node=True, path=True, value=False),
+            {123, 'tag#1234', 'tag#5678'})
+        self.assertSetEqual(to_dict_view(self.triples_N11, one_node=False, one_path=True,  unique_paths=self.unique_paths, node=True, path=True, value=False),
+            {123, 321})
+        self.assertSetEqual(to_dict_view(self.triples_N1U, one_node=False, one_path=True,  unique_paths=self.unique_paths, node=True, path=True, value=False),
+            {'tag#1234', 'tag#5678', 'tag#4321'})
+        self.assertSetEqual(to_dict_view(self.triples_NM1, one_node=False, one_path=False, unique_paths=self.unique_paths, node=True, path=True, value=False),
+            {123, '2010-01-02', 321, '2022-02-22'})
+        self.assertSetEqual(to_dict_view(self.triples_NMU, one_node=False, one_path=False, unique_paths=self.unique_paths, node=True, path=True, value=False),
+            {123, 'tag#1234', 'tag#5678', 321, '2022-02-22'})
+
+    def test_agg_value(self):
+        self.assertDictEqual(to_dict_view(self.triples_111, one_node=True,  one_path=True,  unique_paths=self.unique_paths, node=False, path=False, value=True),
+            {'ent#1234': {ns.bse.iso: 123}})
+        self.assertDictEqual(to_dict_view(self.triples_11U, one_node=True,  one_path=True,  unique_paths=self.unique_paths, node=False, path=False, value=True),
+            {'ent#1234': {ns.bse.tag: {'tag#1234', 'tag#5678'}}})
+        self.assertDictEqual(to_dict_view(self.triples_1M1, one_node=True,  one_path=False, unique_paths=self.unique_paths, node=False, path=False, value=True),
+            {'ent#1234': {ns.bse.iso: 123, ns.bse.t_created: '2010-01-02'}})
+        self.assertDictEqual(to_dict_view(self.triples_1MU, one_node=True,  one_path=False, unique_paths=self.unique_paths, node=False, path=False, value=True),
+            {'ent#1234': {ns.bse.iso: 123, ns.bse.tag: {'tag#1234', 'tag#5678'}}})
+        self.assertDictEqual(to_dict_view(self.triples_N11, one_node=False, one_path=True,  unique_paths=self.unique_paths, node=False, path=False, value=True),
+            {'ent#1234': {ns.bse.iso: 123}, 'ent#4321': {ns.bse.iso: 321}})
+        self.assertDictEqual(to_dict_view(self.triples_N1U, one_node=False, one_path=True,  unique_paths=self.unique_paths, node=False, path=False, value=True),
+            {'ent#1234': {ns.bse.tag: {'tag#1234', 'tag#5678'}}, 'ent#4321': {ns.bse.tag: {'tag#4321'}}})
+        self.assertDictEqual(to_dict_view(self.triples_NM1, one_node=False, one_path=False, unique_paths=self.unique_paths, node=False, path=False, value=True),
+            {'ent#1234': {ns.bse.iso: 123, ns.bse.t_created: '2010-01-02'}, 'ent#4321': {ns.bse.iso: 321, ns.bse.t_created: '2022-02-22'}})
+        self.assertDictEqual(to_dict_view(self.triples_NMU, one_node=False, one_path=False, unique_paths=self.unique_paths, node=False, path=False, value=True),
+            {'ent#1234': {ns.bse.iso: 123, ns.bse.tag: {'tag#1234', 'tag#5678'}}, 'ent#4321': {ns.bse.iso: 321, ns.bse.t_created: '2022-02-22'}})
+
+    def test_agg_node_value(self):
+        self.assertDictEqual(to_dict_view(self.triples_111, one_node=True,  one_path=True,  unique_paths=self.unique_paths, node=True, path=False, value=True),
+            {ns.bse.iso: 123})
+        self.assertDictEqual(to_dict_view(self.triples_11U, one_node=True,  one_path=True,  unique_paths=self.unique_paths, node=True, path=False, value=True),
+            {ns.bse.tag: {'tag#1234', 'tag#5678'}})
+        self.assertDictEqual(to_dict_view(self.triples_1M1, one_node=True,  one_path=False, unique_paths=self.unique_paths, node=True, path=False, value=True),
+            {ns.bse.iso: 123, ns.bse.t_created: '2010-01-02'})
+        self.assertDictEqual(to_dict_view(self.triples_1MU, one_node=True,  one_path=False, unique_paths=self.unique_paths, node=True, path=False, value=True),
+            {ns.bse.iso: 123, ns.bse.tag: {'tag#1234', 'tag#5678'}})
+        self.assertDictEqual(to_dict_view(self.triples_N11, one_node=False, one_path=True,  unique_paths=self.unique_paths, node=True, path=False, value=True),
+            {ns.bse.iso: {123, 321}})
+        self.assertDictEqual(to_dict_view(self.triples_N1U, one_node=False, one_path=True,  unique_paths=self.unique_paths, node=True, path=False, value=True),
+            {ns.bse.tag: {'tag#1234', 'tag#5678', 'tag#4321'}})
+        self.assertDictEqual(to_dict_view(self.triples_NM1, one_node=False, one_path=False, unique_paths=self.unique_paths, node=True, path=False, value=True),
+            {ns.bse.iso: {123, 321}, ns.bse.t_created: {'2010-01-02', '2022-02-22'}})
+        self.assertDictEqual(to_dict_view(self.triples_NMU, one_node=False, one_path=False, unique_paths=self.unique_paths, node=True, path=False, value=True),
+            {ns.bse.iso: {123, 321}, ns.bse.tag: {'tag#1234', 'tag#5678'}, ns.bse.t_created: {'2022-02-22'}})
+
+    def test_agg_path_value(self):
+        self.assertDictEqual(to_dict_view(self.triples_111, one_node=True,  one_path=True,  unique_paths=self.unique_paths, node=False, path=True, value=True),
+            {'ent#1234': 123})
+        self.assertDictEqual(to_dict_view(self.triples_11U, one_node=True,  one_path=True,  unique_paths=self.unique_paths, node=False, path=True, value=True),
+            {'ent#1234': {'tag#1234', 'tag#5678'}})
+        self.assertDictEqual(to_dict_view(self.triples_1M1, one_node=True,  one_path=False, unique_paths=self.unique_paths, node=False, path=True, value=True),
+            {'ent#1234': {123, '2010-01-02'}})
+        self.assertDictEqual(to_dict_view(self.triples_1MU, one_node=True,  one_path=False, unique_paths=self.unique_paths, node=False, path=True, value=True),
+            {'ent#1234': {123, 'tag#1234', 'tag#5678'}})
+        self.assertDictEqual(to_dict_view(self.triples_N11, one_node=False, one_path=True,  unique_paths=self.unique_paths, node=False, path=True, value=True),
+            {'ent#1234': 123, 'ent#4321': 321})
+        self.assertDictEqual(to_dict_view(self.triples_N1U, one_node=False, one_path=True,  unique_paths=self.unique_paths, node=False, path=True, value=True),
+            {'ent#1234': {'tag#1234', 'tag#5678'}, 'ent#4321': {'tag#4321'}})
+        self.assertDictEqual(to_dict_view(self.triples_NM1, one_node=False, one_path=False, unique_paths=self.unique_paths, node=False, path=True, value=True),
+            {'ent#1234': {123, '2010-01-02'}, 'ent#4321': {321, '2022-02-22'}})
+        self.assertDictEqual(to_dict_view(self.triples_NMU, one_node=False, one_path=False, unique_paths=self.unique_paths, node=False, path=True, value=True),
+            {'ent#1234': {123, 'tag#1234', 'tag#5678'}, 'ent#4321': {321, '2022-02-22'}})
+
+    def test_agg_all(self):
+        self.assertEqual(to_dict_view(self.triples_111, one_node=True,  one_path=True,  unique_paths=self.unique_paths, node=True, path=True, value=True),
+            123)
+        self.assertSetEqual(to_dict_view(self.triples_11U, one_node=True,  one_path=True,  unique_paths=self.unique_paths, node=True, path=True, value=True),
+            {'tag#1234', 'tag#5678'})
+        self.assertSetEqual(to_dict_view(self.triples_1M1, one_node=True,  one_path=False, unique_paths=self.unique_paths, node=True, path=True, value=True),
+            {123, '2010-01-02'})
+        self.assertSetEqual(to_dict_view(self.triples_1MU, one_node=True,  one_path=False, unique_paths=self.unique_paths, node=True, path=True, value=True),
+            {123, 'tag#1234', 'tag#5678'})
+        self.assertSetEqual(to_dict_view(self.triples_N11, one_node=False, one_path=True,  unique_paths=self.unique_paths, node=True, path=True, value=True),
+            {123, 321})
+        self.assertSetEqual(to_dict_view(self.triples_N1U, one_node=False, one_path=True,  unique_paths=self.unique_paths, node=True, path=True, value=True),
+            {'tag#1234', 'tag#5678', 'tag#4321'})
+        self.assertSetEqual(to_dict_view(self.triples_NM1, one_node=False, one_path=False, unique_paths=self.unique_paths, node=True, path=True, value=True),
+            {123, '2010-01-02', 321, '2022-02-22'})
+        self.assertSetEqual(to_dict_view(self.triples_NMU, one_node=False, one_path=False, unique_paths=self.unique_paths, node=True, path=True, value=True),
+            {123, 'tag#1234', 'tag#5678', 321, '2022-02-22'})
+
+
+## main ##
+
+if __name__ == '__main__':
+    unittest.main()
+
+## EOF ##