tests/test_neo4j.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 srv = new Neo4jServer
  21 srv.start_quiet
  22
  23 print "# Test local\n"
  24
  25 var client = new Neo4jClient("http://localhost:7474")
  26 assert client.is_ok
  27
  28 # Clear the previous objects, if any
  29 client.cypher(new CypherQuery.from_string("MATCH (n) WHERE n.key = {key} OPTIONAL MATCH n-[r]-() DELETE r, n"))
  30
  31 var andres = new NeoNode
  32 andres.labels.add_all(["PERSON", "MALE"])
  33 andres["name"] = "Andres"
  34 andres["age"] = 24
  35 andres["status"] = true
  36 andres["groups"] = new JsonArray.from([1, 2, 3])
  37 andres["key"] = key
  38
  39 # Create node
  40 client.save_node(andres)
  41 assert andres.is_linked
  42 var andres_url = andres.url.to_s
  43
  44 # Read Node
  45 var res1 = client.load_node(andres_url)
  46 assert res1.is_linked
  47 print res1["name"].to_s
  48 print res1["age"].to_s
  49 print res1["status"].to_s
  50 print res1["groups"].to_json
  51 print res1.labels.join(" ")
  52 assert res1.out_edges.is_empty
  53
  54 # Create a second node
  55 var kate = new NeoNode
  56 kate.labels.add_all(["PERSON", "FEMALE"])
  57 kate["name"] = "Kate"
  58 kate["age"] = 25
  59 kate["status"] = false
  60 client.save_node(kate)
  61 assert kate.is_linked
  62 var kate_url = kate.url.to_s
  63 var res2 = client.load_node(kate_url)
  64
  65 # Create an edge
  66 var loves = new NeoEdge(andres, "LOVES", kate)
  67 loves["since"] = 1999
  68 client.save_edge(loves)
  69 assert loves.is_linked
  70 var loves_url = loves.url.to_s
  71
  72 # Check edge
  73 assert loves.from == andres
  74 assert loves.from == res1
  75 assert loves.to == kate
  76 assert loves.to == res2
  77
  78 # Read edge
  79 var res3 = client.load_edge(loves_url)
  80 assert res3.is_linked
  81 print res3.rel_type.to_s
  82 print res3["since"].to_s
  83
  84 # Follow edge
  85 print "{andres["name"].to_s} LOVES {andres.out_nodes("LOVES").first["name"].to_s}"
  86 print "{kate["name"].to_s} IS LOVED BY {kate.in_nodes("LOVES").first["name"].to_s}"
  87
  88 print "\n# Test lazy\n"
  89
  90 client = new Neo4jClient("http://localhost:7474/")
  91 assert client.is_ok
  92
  93 # Read Andres
  94 var res4 = client.load_node(andres_url)
  95 assert res4.is_linked
  96 print res4["name"].to_s
  97 print res4["age"].to_s
  98 print res4["status"].to_s
  99 print res4["groups"].to_json
 100 print res4.labels.join(" ")
 101 assert res4.in_edges.is_empty
 102 assert not res4.out_edges.is_empty
 103
 104 # Read Kate
 105 var res5 = client.load_node(kate_url)
 106 assert res5.is_linked
 107 print res5["name"].to_s
 108 print res5["age"].to_s
 109 print res5["status"].to_s
 110 print res5.labels.join(" ")
 111 assert not res5.in_edges.is_empty
 112 assert res5.out_edges.is_empty
 113
 114 # Read LOVES
 115 var res6 = client.load_edge(loves_url)
 116 assert res6.is_linked
 117 print res6.rel_type.to_s
 118 print res6["since"].to_s
 119 print "{res4["name"].to_s} LOVES {res4.out_nodes("LOVES").first["name"].to_s}"
 120 print "{res5["name"].to_s} IS LOVED BY {res5.in_nodes("LOVES").first["name"].to_s}"
 121
 122 # Test Cypher
 123 var query = (new CypherQuery).
 124         nmatch("(n: MALE)-[r: LOVES]->(m)").
 125         nwhere("n.name = 'Andres'").
 126         nand("n.key = {key}").
 127         nreturn("n, r, m")
 128 var res7 = client.cypher(query)
 129 assert res7.as(JsonObject)["data"].as(JsonArray).length == 1
 130