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 var key = get_time
  18
  19 var srv = new Neo4jServer
  20 srv.start_quiet
  21
  22 print "# Test local\n"
  23
  24 var client = new Neo4jClient("http://localhost:7474")
  25 assert client.is_ok
  26
  27 var andres = new NeoNode
  28 andres.labels.add_all(["PERSON", "MALE"])
  29 andres["name"] = "Andres"
  30 andres["age"] = 24
  31 andres["status"] = true
  32 andres["groups"] = new JsonArray.from([1, 2, 3])
  33 andres["key"] = key
  34
  35 # Create node
  36 client.save_node(andres)
  37 assert andres.is_linked
  38 var andres_url = andres.url.to_s
  39
  40 # Read Node
  41 var res1 = client.load_node(andres_url)
  42 assert res1.is_linked
  43 print res1["name"].to_s
  44 print res1["age"].to_s
  45 print res1["status"].to_s
  46 print res1["groups"].to_json
  47 print res1.labels.join(" ")
  48 assert res1.out_edges.is_empty
  49
  50 # Create a second node
  51 var kate = new NeoNode
  52 kate.labels.add_all(["PERSON", "FEMALE"])
  53 kate["name"] = "Kate"
  54 kate["age"] = 25
  55 kate["status"] = false
  56 client.save_node(kate)
  57 assert kate.is_linked
  58 var kate_url = kate.url.to_s
  59 var res2 = client.load_node(kate_url)
  60
  61 # Create an edge
  62 var loves = new NeoEdge(andres, "LOVES", kate)
  63 loves["since"] = 1999
  64 client.save_edge(loves)
  65 assert loves.is_linked
  66 var loves_url = loves.url.to_s
  67
  68 # Check edge
  69 assert loves.from == andres
  70 assert loves.from == res1
  71 assert loves.to == kate
  72 assert loves.to == res2
  73
  74 # Read edge
  75 var res3 = client.load_edge(loves_url)
  76 assert res3.is_linked
  77 print res3.rel_type.to_s
  78 print res3["since"].to_s
  79
  80 # Follow edge
  81 print "{andres["name"].to_s} LOVES {andres.out_nodes("LOVES").first["name"].to_s}"
  82 print "{kate["name"].to_s} IS LOVED BY {kate.in_nodes("LOVES").first["name"].to_s}"
  83
  84 print "\n# Test lazy\n"
  85
  86 client = new Neo4jClient("http://localhost:7474/")
  87 assert client.is_ok
  88
  89 # Read Andres
  90 var res4 = client.load_node(andres_url)
  91 assert res4.is_linked
  92 print res4["name"].to_s
  93 print res4["age"].to_s
  94 print res4["status"].to_s
  95 print res4["groups"].to_json
  96 print res4.labels.join(" ")
  97 assert res4.in_edges.is_empty
  98 assert not res4.out_edges.is_empty
  99
 100 # Read Kate
 101 var res5 = client.load_node(kate_url)
 102 assert res5.is_linked
 103 print res5["name"].to_s
 104 print res5["age"].to_s
 105 print res5["status"].to_s
 106 print res5.labels.join(" ")
 107 assert not res5.in_edges.is_empty
 108 assert res5.out_edges.is_empty
 109
 110 # Read LOVES
 111 var res6 = client.load_edge(loves_url)
 112 assert res6.is_linked
 113 print res6.rel_type.to_s
 114 print res6["since"].to_s
 115 print "{res4["name"].to_s} LOVES {res4.out_nodes("LOVES").first["name"].to_s}"
 116 print "{res5["name"].to_s} IS LOVED BY {res5.in_nodes("LOVES").first["name"].to_s}"
 117
 118 # Test Cypher
 119 var query = (new CypherQuery).
 120         nmatch("(n: MALE)-[r: LOVES]->(m)").
 121         nwhere("n.name = 'Andres'").
 122         nand("n.key = {key}").
 123         nreturn("n, r, m")
 124 var res7 = client.cypher(query)
 125 assert not res7.as(JsonObject)["data"].as(JsonArray).is_empty
 126