anchor.diff:  
   #load "StringUtils.fs"
         "Cypher.fs"
  +      "TypeAnnotations.fs"
  +      "CypherGrammar.fs"
         "Interpreter.fs"
   
   open System
  
positive.code: 
  // prepare data for tests
  let initTestData (client: GraphClient) =
      let userDenis = { FacebookId = "12345" }
      let userTT = { FacebookId = "45678" }
      let userOpwal = { FacebookId = "67890" }
      let userChou2 = { FacebookId = "FbChouchou" }
  
      let householdColocJoie = { Name = "Coloc de la Joie" }
      let householdColoCarrouf = { Name = "Colocarouf" }
  
negative.code:     createRightRelationship userDenis { IsResidentOf.CustomHouseholdName = "Maison à République" } householdColocJoie
      createRightRelationship userTT { IsResidentOf.CustomHouseholdName = "" } householdColocJoie
      createRightRelationship userOpwal { IsResidentOf.CustomHouseholdName = "Répupu" } householdColocJoie
      createRightRelationship userDenis { IsGuestOf.CustomHouseholdName = "Chez Barbie" } householdColoCarrouf