Add Codable for the parts of OpenAPI that are built so far.

Package.resolved

@@ -1,6 +1,15 @@
 {
   "object": {
     "pins": [
+      {
+        "package": "AnyCodable",
+        "repositoryURL": "https://github.com/Flight-School/AnyCodable.git",
+        "state": {
+          "branch": null,
+          "revision": "396ccc3dba5bdee04c1e742e7fab40582861401e",
+          "version": "0.1.0"
+        }
+      },
       {
         "package": "Poly",
         "repositoryURL": "https://github.com/mattpolzin/Poly.git",

Package.swift

@@ -17,7 +17,8 @@ let package = Package(
             targets: ["JSONAPIOpenAPI"])
     ],
     dependencies: [
-		.package(url: "https://github.com/mattpolzin/Poly.git", .branch("master"))
+		    .package(url: "https://github.com/mattpolzin/Poly.git", .branch("master")),
+        .package(url: "https://github.com/Flight-School/AnyCodable.git", from: "0.1.0")
     ],
     targets: [
         .target(
@@ -28,7 +29,7 @@ let package = Package(
             dependencies: ["JSONAPI"]),
         .target(
             name: "JSONAPIOpenAPI",
-            dependencies: ["JSONAPI"]),
+            dependencies: ["JSONAPI", "AnyCodable"]),
         .testTarget(
             name: "JSONAPITests",
             dependencies: ["JSONAPI", "JSONAPITesting"]),

Sources/JSONAPIOpenAPI/JSONAPIOpenAPITypes.swift

@@ -7,26 +7,61 @@
 
 import JSONAPI
 
-extension Attribute: OpenAPITyped where RawValue: OpenAPITyped {
-	public var openAPIType: OpenAPI.JSONTypeFormat {
-		return value.openAPIType
+extension Attribute: OpenAPINodeType where RawValue: OpenAPINodeType {
+	static public var openAPINode: OpenAPI.JSONNode {
+		return RawValue.openAPINode
 	}
 }
 
-extension TransformedAttribute: OpenAPITyped where RawValue: OpenAPITyped {
-	public var openAPIType: OpenAPI.JSONTypeFormat {
-		return rawValue.openAPIType
+extension TransformedAttribute: OpenAPINodeType where RawValue: OpenAPINodeType {
+	static public var openAPINode: OpenAPI.JSONNode {
+		return RawValue.openAPINode
 	}
 }
 
-extension ToOneRelationship: OpenAPITyped {
-	public var openAPIType: OpenAPI.JSONTypeFormat {
-		return .object(.generic)
+private protocol _Optional {}
+extension Optional: _Optional {}
+
+extension ToOneRelationship: OpenAPINodeType {
+	// TODO: const for json `type`
+	static public var openAPINode: OpenAPI.JSONNode {
+		let nullable = Identifiable.self is _Optional.Type
+		return .object(.init(format: .generic,
+							 required: true),
+					   .init(properties: [
+						"data": .object(.init(format: .generic,
+											  required: true,
+											  nullable: nullable),
+										.init(properties: [
+											"id": .string(.init(format: .generic,
+																required: true),
+														  .init()),
+											"type": .string(.init(format: .generic,
+																  required: true),
+															.init())
+											]))
+						]))
 	}
 }
 
-extension ToManyRelationship: OpenAPITyped {
-	public var openAPIType: OpenAPI.JSONTypeFormat {
-		return .object(.generic)
+extension ToManyRelationship: OpenAPINodeType {
+	// TODO: const for json `type`
+	static public var openAPINode: OpenAPI.JSONNode {
+		return .object(.init(format: .generic,
+							 required: true),
+					   .init(properties: [
+						"data": .array(.init(format: .generic,
+											 required: true),
+									   .init(items: .object(.init(format: .generic,
+																  required: true),
+															.init(properties: [
+																"id": .string(.init(format: .generic,
+																					required: true),
+																			  .init()),
+																"type": .string(.init(format: .generic,
+																					  required: true),
+																				.init())
+																]))))
+						]))
 	}
 }

Sources/JSONAPIOpenAPI/OpenAPITypes+Codable.swift

@@ -0,0 +1,176 @@
+//
+//  OpenAPITypes+Codable.swift
+//  JSONAPIOpenAPI
+//
+//  Created by Mathew Polzin on 1/14/19.
+//
+
+extension OpenAPI.JSONNode.Context: Encodable {
+
+	private enum CodingKeys: String, CodingKey {
+		case type
+		case format
+		case allowedValues = "enum"
+		case nullable
+	}
+
+	public func encode(to encoder: Encoder) throws {
+		var container = encoder.container(keyedBy: CodingKeys.self)
+
+		try container.encode(format.jsonType, forKey: .type)
+
+		if format != Format.unspecified {
+			try container.encode(format, forKey: .format)
+		}
+
+		if allowedValues != nil {
+			try container.encode(allowedValues, forKey: .allowedValues)
+		}
+
+		try container.encode(nullable, forKey: .nullable)
+	}
+}
+
+extension OpenAPI.JSONNode.NumericContext: Encodable {
+	private enum CodingKeys: String, CodingKey {
+		case multipleOf
+		case maximum
+		case exclusiveMaximum
+		case minimum
+		case exclusiveMinimum
+	}
+
+	public func encode(to encoder: Encoder) throws {
+		var container = encoder.container(keyedBy: CodingKeys.self)
+
+		if multipleOf != nil {
+			try container.encode(multipleOf, forKey: .multipleOf)
+		}
+
+		if maximum != nil {
+			try container.encode(maximum, forKey: .maximum)
+		}
+
+		if exclusiveMaximum != nil {
+			try container.encode(exclusiveMaximum, forKey: .exclusiveMaximum)
+		}
+
+		if minimum != nil {
+			try container.encode(minimum, forKey: .minimum)
+		}
+
+		if exclusiveMinimum != nil {
+			try container.encode(exclusiveMinimum, forKey: .exclusiveMinimum)
+		}
+	}
+}
+
+extension OpenAPI.JSONNode.StringContext: Encodable {
+	private enum CodingKeys: String, CodingKey {
+		case maxLength
+		case minLength
+		case pattern
+	}
+
+	public func encode(to encoder: Encoder) throws {
+		var container = encoder.container(keyedBy: CodingKeys.self)
+
+		if maxLength != nil {
+			try container.encode(maxLength, forKey: .maxLength)
+		}
+
+		try container.encode(minLength, forKey: .minLength)
+
+		if pattern != nil {
+			try container.encode(pattern, forKey: .pattern)
+		}
+	}
+}
+
+extension OpenAPI.JSONNode.ArrayContext: Encodable {
+	private enum CodingKeys: String, CodingKey {
+		case items
+		case maxItems
+		case minItems
+		case uniqueItems
+	}
+
+	public func encode(to encoder: Encoder) throws {
+		var container = encoder.container(keyedBy: CodingKeys.self)
+
+		try container.encode(items, forKey: .items)
+
+		if maxItems != nil {
+			try container.encode(maxItems, forKey: .maxItems)
+		}
+
+		try container.encode(minItems, forKey: .minItems)
+
+		try container.encode(uniqueItems, forKey: .uniqueItems)
+	}
+}
+
+extension OpenAPI.JSONNode.ObjectContext : Encodable{
+	private enum CodingKeys: String, CodingKey {
+		case maxProperties
+		case minProperties
+		case properties
+		case additionalProperties
+		case required
+	}
+
+	public func encode(to encoder: Encoder) throws {
+		var container = encoder.container(keyedBy: CodingKeys.self)
+
+		if maxProperties != nil {
+			try container.encode(maxProperties, forKey: .maxProperties)
+		}
+
+		try container.encode(properties, forKey: .properties)
+
+		if additionalProperties != nil {
+			try container.encode(additionalProperties, forKey: .additionalProperties)
+		}
+
+		let required = properties.filter { (name, node) in
+			node.required
+		}.keys
+
+		try container.encode(Array(required), forKey: .required)
+
+		try container.encode(max(minProperties, required.count), forKey: .minProperties)
+	}
+}
+
+extension OpenAPI.JSONNode: Encodable {
+	public func encode(to encoder: Encoder) throws {
+		switch self {
+		case .boolean(let context):
+			try context.encode(to: encoder)
+
+		case .object(let contextA as Encodable, let contextB as Encodable),
+			 .array(let contextA as Encodable, let contextB as Encodable),
+			 .number(let contextA as Encodable, let contextB as Encodable),
+			 .integer(let contextA as Encodable, let contextB as Encodable),
+			 .string(let contextA as Encodable, let contextB as Encodable):
+			try contextA.encode(to: encoder)
+			try contextB.encode(to: encoder)
+
+		case .allOf(let nodes):
+			// TODO
+			print("TODO")
+
+		case .oneOf(let nodes):
+			// TODO
+			print("TODO")
+
+		case .anyOf(let nodes):
+			// TODO
+			print("TODO")
+
+		case .not(let node):
+			// TODO
+			print("TODO")
+		}
+	}
+}

Sources/JSONAPIOpenAPI/OpenAPITypes.swift

@@ -5,18 +5,28 @@
 //  Created by Mathew Polzin on 1/13/19.
 //
 
-public protocol OpenAPITyped {
-	var openAPIType: OpenAPI.JSONTypeFormat { get }
+import AnyCodable
+
+public protocol OpenAPINodeType {
+	static var openAPINode: OpenAPI.JSONNode { get }
 }
 
 public protocol SwiftTyped {
-	associatedtype SwiftType
+	associatedtype SwiftType: Codable
 }
 
-public protocol OpenAPIFormat: SwiftTyped {}
+public protocol OpenAPIFormat: SwiftTyped, Codable, Equatable {
+	static var unspecified: Self { get }
+
+	var jsonType: OpenAPI.JSONType { get }
+}
+
+public protocol JSONNodeContext {
+	var required: Bool { get }
+}
 
 public extension OpenAPI {
-	enum JSONType: String {
+	enum JSONType: String, Codable {
 		case boolean = "boolean"
 		case object = "object"
 		case array = "array"
@@ -34,75 +44,98 @@ public extension OpenAPI {
 		case string(StringFormat)
 	}
 
-	enum JSONTypeNode {
+	/// A JSON Node is what OpenAPI calls a
+	/// "Schema Object"
+	enum JSONNode {
 		case boolean(Context<JSONTypeFormat.BooleanFormat>)
 		indirect case object(Context<JSONTypeFormat.ObjectFormat>, ObjectContext)
 		indirect case array(Context<JSONTypeFormat.ArrayFormat>, ArrayContext)
 		case number(Context<JSONTypeFormat.NumberFormat>, NumericContext)
 		case integer(Context<JSONTypeFormat.IntegerFormat>, NumericContext)
 		case string(Context<JSONTypeFormat.StringFormat>, StringContext)
-		indirect case allOf([JSONTypeNode])
-		indirect case oneOf([JSONTypeNode])
-		indirect case anyOf([JSONTypeNode])
-		indirect case not(JSONTypeNode)
-	}
-}
-
-extension OpenAPI.JSONType {
-	public var swiftType: Any.Type {
-		switch self {
-		case .boolean:
-			return Bool.self
-		case .object:
-			return Any.self
-		case .array:
-			return [Any].self
-		case .number:
-			return Double.self
-		case .integer:
-			return Int.self
-		case .string:
-			return String.self
-		}
+		indirect case allOf([JSONNode])
+		indirect case oneOf([JSONNode])
+		indirect case anyOf([JSONNode])
+		indirect case not(JSONNode)
 	}
 }
 
 public extension OpenAPI.JSONTypeFormat {
-	public enum BooleanFormat: String, Equatable, Codable, OpenAPIFormat {
+	public enum BooleanFormat: String, Equatable, OpenAPIFormat {
 		case generic = ""
 
 		public typealias SwiftType = Bool
+
+		public static var unspecified: BooleanFormat {
+			return .generic
+		}
+
+		public var jsonType: OpenAPI.JSONType {
+			return .boolean
+		}
 	}
 
-	public enum ObjectFormat: String, Equatable, Codable, OpenAPIFormat {
+	public enum ObjectFormat: String, Equatable, OpenAPIFormat {
 		case generic = ""
 
-		public typealias SwiftType = Any
+		public typealias SwiftType = AnyCodable
+
+		public static var unspecified: ObjectFormat {
+			return .generic
+		}
+
+		public var jsonType: OpenAPI.JSONType {
+			return .object
+		}
 	}
 
-	public enum ArrayFormat: String, Equatable, Codable, OpenAPIFormat {
+	public enum ArrayFormat: String, Equatable, OpenAPIFormat {
 		case generic = ""
 
-		public typealias SwiftType = [Any]
+		public typealias SwiftType = [AnyCodable]
+
+		public static var unspecified: ArrayFormat {
+			return .generic
+		}
+
+		public var jsonType: OpenAPI.JSONType {
+			return .array
+		}
 	}
 
-	public enum NumberFormat: String, Equatable, Codable, OpenAPIFormat {
+	public enum NumberFormat: String, Equatable, OpenAPIFormat {
 		case generic = ""
 		case float = "float"
 		case double = "double"
 
 		public typealias SwiftType = Double
+
+		public static var unspecified: NumberFormat {
+			return .generic
+		}
+
+		public var jsonType: OpenAPI.JSONType {
+			return .number
+		}
 	}
 
-	public enum IntegerFormat: String, Equatable, Codable, OpenAPIFormat {
+	public enum IntegerFormat: String, Equatable, OpenAPIFormat {
 		case generic = ""
 		case int32 = "int32"
 		case int64 = "int64"
 
 		public typealias SwiftType = Int
+
+		public static var unspecified: IntegerFormat {
+			return .generic
+		}
+
+		public var jsonType: OpenAPI.JSONType {
+			return .integer
+		}
 	}
 
-	public enum StringFormat: String, Equatable, Codable, OpenAPIFormat {
+	public enum StringFormat: String, Equatable, OpenAPIFormat {
 		case generic = ""
 		case byte = "byte"
 		case binary = "binary"
@@ -111,6 +144,14 @@ public extension OpenAPI.JSONTypeFormat {
 		case password = "password"
 
 		public typealias SwiftType = String
+
+		public static var unspecified: StringFormat {
+			return .generic
+		}
+
+		public var jsonType: OpenAPI.JSONType {
+			return .string
+		}
 	}
 
 	public var jsonType: OpenAPI.JSONType {
@@ -131,10 +172,11 @@ public extension OpenAPI.JSONTypeFormat {
 	}
 }
 
-extension OpenAPI.JSONTypeNode {
-	public struct Context<Format: OpenAPIFormat> {
+extension OpenAPI.JSONNode {
+	public struct Context<Format: OpenAPIFormat>: JSONNodeContext {
 		public let format: Format
 		public let required: Bool
+		public let nullable: Bool
 
 		/// The OpenAPI spec calls this "enum"
 		/// If not specified, it is assumed that any
@@ -143,44 +185,99 @@ extension OpenAPI.JSONTypeNode {
 
 		public init(format: Format,
 					required: Bool,
+					nullable: Bool = false,
 					allowedValues: [Format.SwiftType]? = nil) {
 			self.format = format
 			self.required = required
+			self.nullable = nullable
 			self.allowedValues = allowedValues
 		}
+
+		/// Return the optional version of this Context
+		public func optionalContext() -> Context {
+			return .init(format: format,
+						 required: false,
+						 allowedValues: allowedValues)
+		}
+
+		/// Return the required version of this context
+		public func requiredContext() -> Context {
+			return .init(format: format,
+						 required: true,
+						 allowedValues: allowedValues)
+		}
 	}
 
 	public struct NumericContext {
+		/// A numeric instance is valid only if division by this keyword's value results in an integer. Defaults to nil.
 		public let multipleOf: Double?
 		public let maximum: Double?
 		public let exclusiveMaximum: Double?
 		public let minimum: Double?
 		public let exclusiveMinimum: Double?
+
+		public init(multipleOf: Double? = nil,
+					maximum: Double? = nil,
+					exclusiveMaximum: Double? = nil,
+					minimum: Double? = nil,
+					exclusiveMinimum: Double? = nil) {
+			self.multipleOf = multipleOf
+			self.maximum = maximum
+			self.exclusiveMaximum = exclusiveMaximum
+			self.minimum = minimum
+			self.exclusiveMinimum = exclusiveMinimum
+		}
 	}
 
 	public struct StringContext {
 		public let maxLength: Int?
-		public let minLength: Int?
+		public let minLength: Int
 
 		/// Regular expression
 		public let pattern: String?
+
+		public init(maxLength: Int? = nil,
+					minLength: Int = 0,
+					pattern: String? = nil) {
+			self.maxLength = maxLength
+			self.minLength = minLength
+			self.pattern = pattern
+		}
 	}
 
 	public struct ArrayContext {
 		/// A JSON Type Node that describes
 		/// the type of each element in the array.
-		public let items: OpenAPI.JSONTypeNode
+		public let items: OpenAPI.JSONNode
 
+		/// Maximum number of items in array.
 		public let maxItems: Int?
-		public let minItems: Int?
-		public let uniqueItems: Bool?
+
+		/// Minimum number of items in array.
+		/// Defaults to 0.
+		public let minItems: Int
+
+		/// Setting to true indicates all
+		/// elements of the array are expected
+		/// to be unique. Defaults to false.
+		public let uniqueItems: Bool
+
+		public init(items: OpenAPI.JSONNode,
+					maxItems: Int? = nil,
+					minItems: Int = 0,
+					uniqueItems: Bool = false) {
+			self.items = items
+			self.maxItems = maxItems
+			self.minItems = minItems
+			self.uniqueItems = uniqueItems
+		}
 	}
 
 	public struct ObjectContext {
 		public let maxProperties: Int?
-		public let minProperties: Int?
-		public let properties: [String: OpenAPI.JSONTypeNode]
-		public let additionalProperties: [String: OpenAPI.JSONTypeNode]
+		public let minProperties: Int
+		public let properties: [String: OpenAPI.JSONNode]
+		public let additionalProperties: [String: OpenAPI.JSONNode]?
 
 		/*
 		// NOTE that an object's required properties
@@ -188,6 +285,16 @@ extension OpenAPI.JSONTypeNode {
 		// required Bool.
 		public let required: [String]
 		*/
+
+		public init(properties: [String: OpenAPI.JSONNode],
+					additionalProperties: [String: OpenAPI.JSONNode]? = nil,
+					maxProperties: Int? = nil,
+					minProperties: Int = 0) {
+			self.properties = properties
+			self.additionalProperties = additionalProperties
+			self.maxProperties = maxProperties
+			self.minProperties = minProperties
+		}
 	}
 
 	public var jsonTypeFormat: OpenAPI.JSONTypeFormat? {
@@ -208,4 +315,58 @@ extension OpenAPI.JSONTypeNode {
 			return nil
 		}
 	}
+
+	public var required: Bool {
+		switch self {
+		case .boolean(let contextA as JSONNodeContext),
+			 .object(let contextA as JSONNodeContext, _),
+			 .array(let contextA as JSONNodeContext, _),
+			 .number(let contextA as JSONNodeContext, _),
+			 .integer(let contextA as JSONNodeContext, _),
+			 .string(let contextA as JSONNodeContext, _):
+			return contextA.required
+		case .allOf, .oneOf, .anyOf, .not:
+			return true
+		}
+	}
+
+	/// Return the optional version of this JSONNode
+	public func optionalNode() -> OpenAPI.JSONNode {
+		switch self {
+		case .boolean(let context):
+			return .boolean(context.optionalContext())
+		case .object(let contextA, let contextB):
+			return .object(contextA.optionalContext(), contextB)
+		case .array(let contextA, let contextB):
+			return .array(contextA.optionalContext(), contextB)
+		case .number(let context, let contextB):
+			return .number(context.optionalContext(), contextB)
+		case .integer(let context, let contextB):
+			return .integer(context.optionalContext(), contextB)
+		case .string(let context, let contextB):
+			return .string(context.optionalContext(), contextB)
+		case .allOf, .oneOf, .anyOf, .not:
+			return self
+		}
+	}
+
+	/// Return the required version of this JSONNode
+	public func requiredNode() -> OpenAPI.JSONNode {
+		switch self {
+		case .boolean(let context):
+			return .boolean(context.requiredContext())
+		case .object(let contextA, let contextB):
+			return .object(contextA.requiredContext(), contextB)
+		case .array(let contextA, let contextB):
+			return .array(contextA.requiredContext(), contextB)
+		case .number(let context, let contextB):
+			return .number(context.requiredContext(), contextB)
+		case .integer(let context, let contextB):
+			return .integer(context.requiredContext(), contextB)
+		case .string(let context, let contextB):
+			return .string(context.requiredContext(), contextB)
+		case .allOf, .oneOf, .anyOf, .not:
+			return self
+		}
+	}
 }

Sources/JSONAPIOpenAPI/SwiftPrimitiveTypes.swift

@@ -26,50 +26,71 @@ A hint to UIs to obscure input:
 
 **/
 
-extension String: OpenAPITyped {
-	public var openAPIType: OpenAPI.JSONTypeFormat {
-		return .string(.generic)
+extension Optional: OpenAPINodeType where Wrapped: OpenAPINodeType {
+	static public var openAPINode: OpenAPI.JSONNode {
+		return Wrapped.openAPINode.optionalNode()
 	}
 }
 
-extension Bool: OpenAPITyped {
-	public var openAPIType: OpenAPI.JSONTypeFormat {
-		return .boolean(.generic)
+extension String: OpenAPINodeType {
+	static public var openAPINode: OpenAPI.JSONNode {
+		return .string(.init(format: .generic,
+							 required: true),
+					   .init())
 	}
 }
 
-extension Array: OpenAPITyped {
-	public var openAPIType: OpenAPI.JSONTypeFormat {
-		return .array(.generic)
+extension Bool: OpenAPINodeType {
+	static public var openAPINode: OpenAPI.JSONNode {
+		return .boolean(.init(format: .generic,
+							  required: true))
 	}
 }
 
-extension Double: OpenAPITyped {
-	public var openAPIType: OpenAPI.JSONTypeFormat {
-		return .number(.double)
+extension Array: OpenAPINodeType where Element: OpenAPINodeType {
+	static public var openAPINode: OpenAPI.JSONNode {
+		return .array(.init(format: .generic,
+							required: true),
+					  .init(items: Element.openAPINode))
 	}
 }
 
-extension Float: OpenAPITyped {
-	public var openAPIType: OpenAPI.JSONTypeFormat {
-		return .number(.float)
+extension Double: OpenAPINodeType {
+	static public var openAPINode: OpenAPI.JSONNode {
+		return .number(.init(format: .double,
+							 required: true),
+					   .init())
 	}
 }
 
-extension Int: OpenAPITyped {
-	public var openAPIType: OpenAPI.JSONTypeFormat {
-		return .integer(.generic)
+extension Float: OpenAPINodeType {
+	static public var openAPINode: OpenAPI.JSONNode {
+		return .number(.init(format: .float,
+							 required: true),
+					   .init())
 	}
 }
 
-extension Int32: OpenAPITyped {
-	public var openAPIType: OpenAPI.JSONTypeFormat {
-		return .integer(.int32)
+extension Int: OpenAPINodeType {
+	static public var openAPINode: OpenAPI.JSONNode {
+		return .integer(.init(format: .generic,
+							  required: true),
+						.init())
 	}
 }
 
-extension Int64: OpenAPITyped {
-	public var openAPIType: OpenAPI.JSONTypeFormat {
-		return .integer(.int64)
+extension Int32: OpenAPINodeType {
+	static public var openAPINode: OpenAPI.JSONNode {
+		return .integer(.init(format: .int32,
+							  required: true),
+						.init())
+	}
+}
+
+extension Int64: OpenAPINodeType {
+	static public var openAPINode: OpenAPI.JSONNode {
+		return .integer(.init(format: .int64,
+							  required: true),
+						.init())
 	}
 }

Tests/JSONAPIOpenAPITests/JSONAPIRelationshipsOpenAPITests.swift

@@ -0,0 +1,47 @@
+//
+//  JSONAPIRelationshipsOpenAPITests.swift
+//  JSONAPI
+//
+//  Created by Mathew Polzin on 1/14/19.
+//
+
+import Foundation
+import XCTest
+import JSONAPI
+import JSONAPITesting
+import JSONAPIOpenAPI
+
+class JSONAPIRelationshipsOpenAPITests: XCTestCase {
+
+	func test_ToOne() {
+		let node = ToOneRelationship<TestEntity1?, NoMetadata, NoLinks>.openAPINode
+
+		let encoder = JSONEncoder()
+		encoder.outputFormatting = .prettyPrinted
+		print(String(data: (try? encoder.encode(node))!, encoding: .utf8)!)
+	}
+}
+
+// MARK: Test Types
+extension JSONAPIRelationshipsOpenAPITests {
+	enum TestEntityType1: EntityDescription {
+		static var jsonType: String { return "test_entities"}
+
+		typealias Attributes = NoAttributes
+		typealias Relationships = NoRelationships
+	}
+
+	typealias TestEntity1 = BasicEntity<TestEntityType1>
+
+	enum TestEntityType2: EntityDescription {
+		static var jsonType: String { return "second_test_entities"}
+
+		typealias Attributes = NoAttributes
+
+		struct Relationships: JSONAPI.Relationships {
+			let other: ToOneRelationship<TestEntity1, NoMetadata, NoLinks>
+		}
+	}
+
+	typealias TestEntity2 = BasicEntity<TestEntityType2>
+}