def test_limit(self): query_builder = QueryBuilder().match().node(variable="n").limit("3") expected_query = " MATCH (n) LIMIT 3 " with patch.object(Memgraph, "execute_and_fetch", return_value=None) as mock: query_builder.execute() mock.assert_called_with(expected_query)
def test_add_string_complete(self): query_builder = QueryBuilder().add_custom_cypher("MATCH (n) RETURN n") expected_query = "MATCH (n) RETURN n" with patch.object(Memgraph, "execute_and_fetch", return_value=None) as mock: query_builder.execute() mock.assert_called_with(expected_query)
def test_remove_label(self): query_builder = QueryBuilder().match().node( variable="n", labels=["Node1", "Node2"]).remove({"n:Node2"}) expected_query = " MATCH (n:Node1:Node2) REMOVE n:Node2 " with patch.object(Memgraph, "execute_and_fetch", return_value=None) as mock: query_builder.execute() mock.assert_called_with(expected_query)
def test_call_procedure_node2vec(self): query_builder = QueryBuilder().call( procedure="node2vec_online.get_embeddings", arguments="False, 2.0, 0.5") expected_query = " CALL node2vec_online.get_embeddings(False, 2.0, 0.5) " with patch.object(Memgraph, "execute_and_fetch", return_value=None) as mock: query_builder.execute() mock.assert_called_with(expected_query)
def test_orderby_desc(self): query_builder = QueryBuilder().match().node( variable="n").order_by("n.id DESC") expected_query = " MATCH (n) ORDER BY n.id DESC " with patch.object(Memgraph, "execute_and_fetch", return_value=None) as mock: query_builder.execute() mock.assert_called_with(expected_query)
def test_simple_merge(self): query_builder = QueryBuilder().merge().node( "L1", variable="n").to("TO").node("L2").return_() expected_query = " MERGE (n:L1)-[:TO]->(:L2) RETURN * " with patch.object(Memgraph, "execute_and_fetch", return_value=None) as mock: query_builder.execute() mock.assert_called_with(expected_query)
def test_with_empty(self): query_builder = QueryBuilder().match().node( "L1", variable="n").to("TO").node("L2", variable="m").with_() expected_query = " MATCH (n:L1)-[:TO]->(m:L2) WITH * " with patch.object(Memgraph, "execute_and_fetch", return_value=None) as mock: query_builder.execute() mock.assert_called_with(expected_query)
def test_with(self): query_builder = QueryBuilder().match().node(variable="n").with_( {"n": ""}) expected_query = " MATCH (n) WITH n " with patch.object(Memgraph, "execute_and_fetch", return_value=None) as mock: query_builder.execute() mock.assert_called_with(expected_query)
def test_delete(self): query_builder = QueryBuilder().match().node(variable="n1", labels="Node1").delete( {"n1"}) expected_query = " MATCH (n1:Node1) DELETE n1 " with patch.object(Memgraph, "execute_and_fetch", return_value=None) as mock: query_builder.execute() mock.assert_called_with(expected_query)
def test_simple_match_with_variables(self): query_builder = (QueryBuilder().match().node("L1", variable="n").to( "TO", variable="e").node("L2", variable="m").return_()) expected_query = " MATCH (n:L1)-[e:TO]->(m:L2) RETURN * " with patch.object(Memgraph, "execute_and_fetch", return_value=None) as mock: query_builder.execute() mock.assert_called_with(expected_query)
def test_delete_detach(self): query_builder = (QueryBuilder().match().node( variable="n1", labels="Node1").to(edge_label="EDGE").node( variable="n2", labels="Node2").delete(["n1", "n2"], True)) expected_query = " MATCH (n1:Node1)-[:EDGE]->(n2:Node2) DETACH DELETE n1, n2 " with patch.object(Memgraph, "execute_and_fetch", return_value=None) as mock: query_builder.execute() mock.assert_called_with(expected_query)
def test_where(self): query_builder = (QueryBuilder().match().node( "L1", variable="n").to("TO").node("L2", variable="m").where( "n.name", "=", "best_name").or_where("m.id", "<", 4).return_()) expected_query = " MATCH (n:L1)-[:TO]->(m:L2) WHERE n.name = 'best_name' OR m.id < 4 RETURN * " with patch.object(Memgraph, "execute_and_fetch", return_value=None) as mock: query_builder.execute() mock.assert_called_with(expected_query)
def test_multiple_matches(self): query_builder = (QueryBuilder().match().node( "L1", variable="n").to("TO").node("L2", variable="m").match(True).node( variable="n").to("TO").node("L3").return_()) expected_query = " MATCH (n:L1)-[:TO]->(m:L2) OPTIONAL MATCH (n)-[:TO]->(:L3) RETURN * " with patch.object(Memgraph, "execute_and_fetch", return_value=None) as mock: query_builder.execute() mock.assert_called_with(expected_query)
def test_return_alias_same_as_variable(self): query_builder = (QueryBuilder().match().node( "L1", variable="n").to("TO").node("L2", variable="m").return_({"L1": "L1"})) expected_query = " MATCH (n:L1)-[:TO]->(m:L2) RETURN L1 " with patch.object(Memgraph, "execute_and_fetch", return_value=None) as mock: query_builder.execute() mock.assert_called_with(expected_query)
def test_call_procedure_nxalg_betweenness_centrality(self): query_builder = (QueryBuilder().call( procedure="nxalg.betweenness_centrality", arguments="20, True").yield_().return_({ "node": "", "betweenness": "" })) expected_query = " CALL nxalg.betweenness_centrality(20, True) YIELD * RETURN node, betweenness " with patch.object(Memgraph, "execute_and_fetch", return_value=None) as mock: query_builder.execute() mock.assert_called_with(expected_query)
def test_union_all(self): query_builder = (QueryBuilder().match().node( variable="n1", labels="Node1").return_({ "n1": "" }).union().match().node(variable="n2", labels="Node2").return_({"n2": ""})) expected_query = " MATCH (n1:Node1) RETURN n1 UNION ALL MATCH (n2:Node2) RETURN n2 " with patch.object(Memgraph, "execute_and_fetch", return_value=None) as mock: query_builder.execute() mock.assert_called_with(expected_query)
def test_get_single(self): query_builder = (QueryBuilder().match().node( "L1", variable="n").to("TO").node("L2", variable="m").return_({"n": ""})) expected_query = " MATCH (n:L1)-[:TO]->(m:L2) RETURN n " with patch.object(Memgraph, "execute_and_fetch", return_value=iter([{ "n": None }])) as mock: query_builder.get_single(retrieve="n") mock.assert_called_with(expected_query)
def test_unwind(self): query_builder = (QueryBuilder().unwind( list_expression="[1, 2, 3, null]", variable="x").return_({ "x": "", "'val'": "y" })) expected_query = " UNWIND [1, 2, 3, null] AS x RETURN x, 'val' AS y " with patch.object(Memgraph, "execute_and_fetch", return_value=None) as mock: query_builder.execute() mock.assert_called_with(expected_query)
def test_call_procedure_pagerank(self): query_builder = (QueryBuilder().call(procedure="pagerank.get").yield_({ "node": "", "rank": "" }).return_({ "node": "node", "rank": "rank" })) expected_query = " CALL pagerank.get() YIELD node, rank RETURN node, rank " with patch.object(Memgraph, "execute_and_fetch", return_value=None) as mock: query_builder.execute() mock.assert_called_with(expected_query)
def test_invalid_match_chain_throws_exception(): with pytest.raises(InvalidMatchChainException): QueryBuilder().node(":Label", "n").node(":Label", "m").return_()