Fixes default values and adds tests

Author: NeedleInAJayStack

Sources/GraphQL/Execution/Values.swift

@@ -152,7 +152,7 @@ func coerceValue(type: GraphQLInputType, value: Map) throws -> Map? {
             var fieldValue = try coerceValue(type: field!.type, value: value[fieldName] ?? .null)
 
             if fieldValue == .null {
-                fieldValue = field.flatMap({ $0.defaultValue.map({ .string($0) }) })
+                fieldValue = field.flatMap({ $0.defaultValue })
             } else {
                 objCopy[fieldName] = fieldValue
             }

Sources/GraphQL/Type/Definition.swift

@@ -1,3 +1,4 @@
+import OrderedCollections
 import Foundation
 import NIO
 
@@ -1274,12 +1275,12 @@ func defineInputObjectFieldMap(
 
 public struct InputObjectField {
     public let type: GraphQLInputType
-    public let defaultValue: String?
+    public let defaultValue: Map?
     public let description: String?
 
     public init(type: GraphQLInputType, defaultValue: Map? = nil, description: String? = nil) {
         self.type = type
-        self.defaultValue = defaultValue?.description
+        self.defaultValue = defaultValue
         self.description = description
     }
 }
@@ -1290,13 +1291,13 @@ public final class InputObjectFieldDefinition {
     public let name: String
     public internal(set) var type: GraphQLInputType
     public let description: String?
-    public let defaultValue: String?
+    public let defaultValue: Map?
 
     init(
         name: String,
         type: GraphQLInputType,
         description: String? = nil,
-        defaultValue: String? = nil
+        defaultValue: Map? = nil
     ) {
         self.name = name
         self.type = type
@@ -1351,7 +1352,7 @@ extension InputObjectFieldDefinition : KeySubscriptable {
     }
 }
 
-public typealias InputObjectFieldDefinitionMap = [String: InputObjectFieldDefinition]
+public typealias InputObjectFieldDefinitionMap = OrderedDictionary<String, InputObjectFieldDefinition>
 
 /**
  * List Modifier

Sources/GraphQL/Utilities/ValueFromAST.swift

@@ -75,18 +75,13 @@ func valueFromAST(valueAST: Value, type: GraphQLInputType, variables: [String: M
                     type: field.type,
                     variables: variables
                 )
-
-                if fieldValue == .null {
-                    if let defaultValue = field.defaultValue {
-                        obj[fieldName] = .string(defaultValue)
-                    } else {
-                        obj[fieldName] = .null
-                    }
+                obj[fieldName] = fieldValue
+            } else {
+                if let defaultValue = field.defaultValue {
+                    obj[fieldName] = defaultValue
                 } else {
-                    obj[fieldName] = fieldValue
+                    obj[fieldName] = .undefined
                 }
-            } else {
-                obj[fieldName] = .undefined
             }
 
             return obj