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 print "# Test local\n"
  21
  22 var client = new Neo4jClient("http://neo4j:7474")
  23 assert client.is_ok
  24
  25 # Clear the previous objects, if any
  26 client.cypher(
  27         new CypherQuery.from_string(
  28                 "MATCH (n) WHERE n.key = \{key\} OPTIONAL MATCH n-[r]-() DELETE r, n"
  29         ).set("key", key)
  30 )
  31
  32 var andres = new NeoNode
  33 andres.labels.add_all(["PERSON", "MALE"])
  34 andres["name"] = "Andres"
  35 andres["age"] = 24
  36 andres["status"] = true
  37 andres["groups"] = new JsonArray.from([1, 2, 3])
  38 andres["key"] = key
  39
  40 # Create node
  41 client.save_node(andres)
  42 assert andres.is_linked
  43 var andres_url = andres.url.to_s
  44
  45 # Read Node
  46 var res1 = client.load_node(andres_url)
  47 assert res1.is_linked
  48 print res1["name"].to_s
  49 print res1["age"].to_s
  50 print res1["status"].to_s
  51 print res1["groups"].to_json
  52 print res1.labels.join(" ")
  53 assert res1.out_edges.is_empty
  54
  55 # Create a second node
  56 var kate = new NeoNode
  57 kate.labels.add_all(["PERSON", "FEMALE"])
  58 kate["name"] = "Kate"
  59 kate["age"] = 25
  60 kate["status"] = false
  61 client.save_node(kate)
  62 assert kate.is_linked
  63 var kate_url = kate.url.to_s
  64 var res2 = client.load_node(kate_url)
  65
  66 # Create an edge
  67 var loves = new NeoEdge(andres, "LOVES", kate)
  68 loves["since"] = 1999
  69 client.save_edge(loves)
  70 assert loves.is_linked
  71 var loves_url = loves.url.to_s
  72
  73 # Check edge
  74 assert loves.from == andres
  75 assert loves.from == res1
  76 assert loves.to == kate
  77 assert loves.to == res2
  78
  79 # Read edge
  80 var res3 = client.load_edge(loves_url)
  81 assert res3.is_linked
  82 print res3.rel_type.to_s
  83 print res3["since"].to_s
  84
  85 # Follow edge
  86 print "{andres["name"].to_s} LOVES {andres.out_nodes("LOVES").first["name"].to_s}"
  87 print "{kate["name"].to_s} IS LOVED BY {kate.in_nodes("LOVES").first["name"].to_s}"
  88
  89 print "\n# Test lazy\n"
  90
  91 client = new Neo4jClient("http://neo4j:7474/")
  92 assert client.is_ok
  93
  94 # Read Andres
  95 var res4 = client.load_node(andres_url)
  96 assert res4.is_linked
  97 print res4["name"].to_s
  98 print res4["age"].to_s
  99 print res4["status"].to_s
 100 print res4["groups"].to_json
 101 print res4.labels.join(" ")
 102 assert res4.in_edges.is_empty
 103 assert not res4.out_edges.is_empty
 104
 105 # Read Kate
 106 var res5 = client.load_node(kate_url)
 107 assert res5.is_linked
 108 print res5["name"].to_s
 109 print res5["age"].to_s
 110 print res5["status"].to_s
 111 print res5.labels.join(" ")
 112 assert not res5.in_edges.is_empty
 113 assert res5.out_edges.is_empty
 114
 115 # Read LOVES
 116 var res6 = client.load_edge(loves_url)
 117 assert res6.is_linked
 118 print res6.rel_type.to_s
 119 print res6["since"].to_s
 120 print "{res4["name"].to_s} LOVES {res4.out_nodes("LOVES").first["name"].to_s}"
 121 print "{res5["name"].to_s} IS LOVED BY {res5.in_nodes("LOVES").first["name"].to_s}"
 122
 123 # Test Cypher
 124 var query = (new CypherQuery).
 125         nmatch("(n: MALE)-[r: LOVES]->(m)").
 126         nwhere("n.name = 'Andres'").
 127         nand("n.key = \{key\}").
 128         nreturn("n, r, m").
 129         set("key", key)
 130 var res7 = client.cypher(query)
 131 assert res7.as(JsonObject)["data"].as(JsonArray).length == 1
 132