tests/test_neo4j_batch.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # Licensed under the Apache License, Version 2.0 (the "License");
   4 # you may not use this file except in compliance with the License.
   5 # You may obtain a copy of the License at
   6 #
   7 #     http://www.apache.org/licenses/LICENSE-2.0
   8 #
   9 # Unless required by applicable law or agreed to in writing, software
  10 # distributed under the License is distributed on an "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 # See the License for the specific language governing permissions and
  13 # limitations under the License.
  14
  15 import neo4j
  16
  17 # key used to loosely assume unicity and prevent conflicting db accesses
  18 var key = "NIT_TESTING_ID".environ.to_i
  19
  20 var andres = new NeoNode
  21 andres.labels.add_all(["PERSON", "MALE"])
  22 andres["name"] = "Andres"
  23 andres["age"] = 24
  24 andres["status"] = true
  25 andres["groups"] = new JsonArray.from([1, 2, 3])
  26 andres["key"] = key
  27
  28 var kate = new NeoNode
  29 kate.labels.add_all(["PERSON", "FEMALE"])
  30 kate["name"] = "Kate"
  31 kate["age"] = 25
  32 kate["status"] = false
  33
  34 var loves = new NeoEdge(andres, "LOVES", kate)
  35 loves["since"] = 1999
  36
  37 var client = new Neo4jClient("http://neo4j:7474")
  38 assert client.is_ok
  39
  40 # Clear the previous objects, if any
  41 client.cypher(
  42         new CypherQuery.from_string(
  43                 "MATCH (n) WHERE n.key = \{key\} OPTIONAL MATCH n-[r]-() DELETE r, n"
  44         ).set("key", key)
  45 )
  46
  47 print "# Save batch\n"
  48
  49 var batch = new NeoBatch(client)
  50 batch.save_node(andres)
  51 batch.save_node(kate)
  52 batch.save_edge(loves)
  53 var errors = batch.execute
  54
  55 assert errors.is_empty
  56 assert andres.is_linked
  57 assert kate.is_linked
  58 assert loves.is_linked
  59
  60 var andres_url = andres.url.to_s
  61 var kate_url = kate.url.to_s
  62 var loves_url = loves.url.to_s
  63
  64 client = new Neo4jClient("http://neo4j:7474")
  65 assert client.is_ok
  66
  67 # Read Andres
  68 var res4 = client.load_node(andres_url)
  69 assert res4.is_linked
  70 print res4["name"].to_s
  71 print res4["age"].to_s
  72 print res4["status"].to_s
  73 print res4["groups"].to_json
  74 print res4.labels.join(" ")
  75 assert res4.in_edges.is_empty
  76 assert not res4.out_edges.is_empty
  77
  78 # Read Kate
  79 var res5 = client.load_node(kate_url)
  80 assert res5.is_linked
  81 print res5["name"].to_s
  82 print res5["age"].to_s
  83 print res5["status"].to_s
  84 print res5.labels.join(" ")
  85 assert not res5.in_edges.is_empty
  86 assert res5.out_edges.is_empty
  87
  88 # Read LOVES
  89 var res6 = client.load_edge(loves_url)
  90 assert res6.is_linked
  91 print res6.rel_type.to_s
  92 print res6["since"].to_s
  93 print "{res4["name"].to_s} LOVES {res4.out_nodes("LOVES").first["name"].to_s}"
  94 print "{res5["name"].to_s} IS LOVED BY {res5.in_nodes("LOVES").first["name"].to_s}"
  95
  96 # Test Cypher
  97 var query = (new CypherQuery).
  98         nmatch("(n: MALE)-[r: LOVES]->(m)").
  99         nwhere("n.name = 'Andres'").
 100         nand("n.key = \{key\}").
 101         nreturn("n, r, m").
 102         set("key", key)
 103 var res7 = client.cypher(query)
 104 assert res7.as(JsonObject)["data"].as(JsonArray).length == 1
 105