Increase graphdb.js test coverage using sample data (#53)

Increased test coverage of logic in graphdb.js which converts a given neptune schema into a graphql schema using various sample data. Test files were added for input neptune schemas (.json) and also for expected graphql schema output (.graphql).

---------

Co-authored-by: Sophia Don Tranho <66497192+sophiadt@users.noreply.github.com>

Author: andreachild

src/test/airports-neptune-schema.json

@@ -0,0 +1,150 @@
+{
+  "nodeStructures": [
+    {
+      "label": "continent",
+      "properties": [
+        {
+          "name": "type",
+          "type": "String"
+        },
+        {
+          "name": "code",
+          "type": "String"
+        },
+        {
+          "name": "desc",
+          "type": "String"
+        }
+      ]
+    },
+    {
+      "label": "country",
+      "properties": [
+        {
+          "name": "type",
+          "type": "String"
+        },
+        {
+          "name": "code",
+          "type": "String"
+        },
+        {
+          "name": "desc",
+          "type": "String"
+        }
+      ]
+    },
+    {
+      "label": "version",
+      "properties": [
+        {
+          "name": "date",
+          "type": "String"
+        },
+        {
+          "name": "desc",
+          "type": "String"
+        },
+        {
+          "name": "author",
+          "type": "String"
+        },
+        {
+          "name": "type",
+          "type": "String"
+        },
+        {
+          "name": "code",
+          "type": "String"
+        }
+      ]
+    },
+    {
+      "label": "airport",
+      "properties": [
+        {
+          "name": "type",
+          "type": "String"
+        },
+        {
+          "name": "city",
+          "type": "String"
+        },
+        {
+          "name": "icao",
+          "type": "String"
+        },
+        {
+          "name": "code",
+          "type": "String"
+        },
+        {
+          "name": "country",
+          "type": "String"
+        },
+        {
+          "name": "lat",
+          "type": "Float"
+        },
+        {
+          "name": "longest",
+          "type": "Float"
+        },
+        {
+          "name": "runways",
+          "type": "Float"
+        },
+        {
+          "name": "desc",
+          "type": "String"
+        },
+        {
+          "name": "lon",
+          "type": "Float"
+        },
+        {
+          "name": "region",
+          "type": "String"
+        },
+        {
+          "name": "elev",
+          "type": "Float"
+        }
+      ]
+    }
+  ],
+  "edgeStructures": [
+    {
+      "label": "contains",
+      "properties": [],
+      "directions": [
+        {
+          "from": "continent",
+          "to": "airport",
+          "relationship": "ONE-MANY"
+        },
+        {
+          "from": "country",
+          "to": "airport",
+          "relationship": "ONE-MANY"
+        }
+      ]
+    },
+    {
+      "label": "route",
+      "properties": [
+        {
+          "name": "dist",
+          "type": "Float"
+        }
+      ],
+      "directions": [
+        {
+          "from": "airport",
+          "to": "airport",
+          "relationship": "MANY-MANY"
+        }
+      ]
+    }
+  ]
+}

src/test/airports.graphql

@@ -0,0 +1,119 @@
+type Continent @alias(property:"continent") {
+_id: ID! @id
+type: String
+code: String
+desc: String
+airportContainssOut(filter: AirportInput, options: Options): [Airport] @relationship(edgeType:"contains", direction:OUT)
+contains:Contains
+}
+
+input ContinentInput {
+_id: ID @id
+type: String
+code: String
+desc: String
+}
+
+type Country @alias(property:"country") {
+_id: ID! @id
+type: String
+code: String
+desc: String
+airportContainssOut(filter: AirportInput, options: Options): [Airport] @relationship(edgeType:"contains", direction:OUT)
+contains:Contains
+}
+
+input CountryInput {
+_id: ID @id
+type: String
+code: String
+desc: String
+}
+
+type Version @alias(property:"version") {
+_id: ID! @id
+date: String
+desc: String
+author: String
+type: String
+code: String
+}
+
+input VersionInput {
+_id: ID @id
+date: String
+desc: String
+author: String
+type: String
+code: String
+}
+
+type Airport @alias(property:"airport") {
+_id: ID! @id
+type: String
+city: String
+icao: String
+code: String
+country: String
+lat: Float
+longest: Float
+runways: Float
+desc: String
+lon: Float
+region: String
+elev: Float
+continentContainsIn: Continent @relationship(edgeType:"contains", direction:IN)
+countryContainsIn: Country @relationship(edgeType:"contains", direction:IN)
+airportRoutesOut(filter: AirportInput, options: Options): [Airport] @relationship(edgeType:"route", direction:OUT)
+airportRoutesIn(filter: AirportInput, options: Options): [Airport] @relationship(edgeType:"route", direction:IN)
+contains:Contains
+route:Route
+}
+
+input AirportInput {
+_id: ID @id
+type: String
+city: String
+icao: String
+code: String
+country: String
+lat: Float
+longest: Float
+runways: Float
+desc: String
+lon: Float
+region: String
+elev: Float
+}
+
+type Contains @alias(property:"contains") {
+_id: ID! @id
+}
+
+type Route @alias(property:"route") {
+_id: ID! @id
+dist: Float
+}
+
+input RouteInput {
+dist: Float
+}
+
+input Options {
+limit:Int
+}
+
+type Query {
+getNodeContinent(filter: ContinentInput): Continent
+getNodeContinents(filter: ContinentInput, options: Options): [Continent]
+getNodeCountry(filter: CountryInput): Country
+getNodeCountrys(filter: CountryInput, options: Options): [Country]
+getNodeVersion(filter: VersionInput): Version
+getNodeVersions(filter: VersionInput, options: Options): [Version]
+getNodeAirport(filter: AirportInput): Airport
+getNodeAirports(filter: AirportInput, options: Options): [Airport]
+}
+
+schema {
+query: Query
+}