Improved Error forwarding

Sources/SwiftGraphQL/HTTP.swift

@@ -113,8 +113,15 @@ private func send<Type, TypeLock>(
         }
 
         // Try to serialize the response.
-        if let data = data, let result = try? GraphQLResult(data, with: selection) {
-            return completionHandler(.success(result))
+        if let data = data {
+            do {
+                let result = try GraphQLResult(data, with: selection)
+                return completionHandler(.success(result))
+            } catch let error as HttpError {
+                return completionHandler(.failure(error))
+            } catch let error {
+                return completionHandler(.failure(.decodingError(error)))
+            }
         }
 
         return completionHandler(.failure(.badpayload))
@@ -139,16 +146,20 @@ public enum HttpError: Error {
     case badpayload
     case badstatus
     case cancelled
+    case decodingError(Error)
 }
 
 extension HttpError: Equatable {
     public static func == (lhs: SwiftGraphQL.HttpError, rhs: SwiftGraphQL.HttpError) -> Bool {
         // Equals if they are of the same type, different otherwise.
         switch (lhs, rhs) {
         case (.badURL, badURL),
-             (.timeout, .timeout),
-             (.badpayload, .badpayload),
-             (.badstatus, .badstatus):
+            (.timeout, .timeout),
+            (.badpayload, .badpayload),
+            (.badstatus, .badstatus),
+            (.cancelled, .cancelled),
+            (.network, network),
+            (.decodingError, decodingError):
             return true
         default:
             return false

Sources/SwiftGraphQL/Result.swift

@@ -17,9 +17,9 @@ extension GraphQLResult where TypeLock: Decodable {
             let response = try decoder.decode(GraphQLResponse.self, from: response)
             self.data = try selection.decode(data: response.data)
             self.errors = response.errors
-        } catch {
+        } catch let error {
             // Catches all errors and turns them into a bad payload SwiftGraphQL error.
-            throw HttpError.badpayload
+            throw HttpError.decodingError(error)
         }
     }
 
@@ -46,7 +46,7 @@ extension GraphQLResult where TypeLock: Decodable {
 // MARK: - GraphQL Error
 
 public struct GraphQLError: Codable, Equatable {
-    let message: String
+    public let message: String
     public let locations: [Location]?
 //    public let path: [String]?