refactor: Added new JSONConvert enum to contain JSON-related operations.

Tests/ApolloTests/JSONTests.swift

@@ -2,6 +2,7 @@ import XCTest
 @testable import Apollo
 import ApolloAPI
 import ApolloInternalTestHelpers
+import StarWarsAPI
 
 class JSONTests: XCTestCase {
   func testMissingValueMatchable() {
@@ -99,4 +100,54 @@ class JSONTests: XCTestCase {
 
     XCTAssertEqual(stringFromSerialized, #"{"aWeirdNull":null}"#)
   }
+
+  func testJSONConvertSelectionSetEncoding() throws {
+    class Hero: MockSelectionSet {
+      typealias Schema = MockSchemaMetadata
+
+      override class var __selections: [Selection] {[
+        .field("__typename", String.self),
+        .field("name", String?.self)
+      ]}
+
+      var name: String? { __data["name"] }
+    }
+
+    let expected: JSONObject = [
+      "__typename": "Human",
+      "name": "Johnny Tsunami"
+    ]
+
+    let converted = try JSONConvert.selectionSetToJSONObject(Hero(data: expected))
+    XCTAssertEqual(converted, expected)
+  }
+
+  func testJSONConvertGraphQLResultEncoding() throws {
+    let jsonObj: [String: AnyHashable] = [
+      "hero": [
+        "name": "Luke Skywalker",
+        "__typename": "Human"
+      ]
+    ]
+    let heroData = try StarWarsAPI.HeroNameQuery.Data(data: jsonObj)
+    let result = GraphQLResult(
+      data: heroData,
+      extensions: nil,
+      errors: nil,
+      source: .server,
+      dependentKeys: nil
+    )
+
+    let expected: [String: Any] = [
+      "data": [
+        "hero": [
+          "name": "Luke Skywalker",
+          "__typename": "Human"
+        ]
+      ]
+    ]
+
+    let converted = JSONConvert.graphQLResultToJSONObject(result)
+    XCTAssertEqual(converted, expected)
+  }
 }

apollo-ios/Sources/Apollo/GraphQLResult.swift

@@ -63,10 +63,7 @@ extension GraphQLResult {
 }
 
 extension DataDict {
-  /// Converts a ``DataDict`` into a basic JSON dictionary for use.
-  ///
-  /// - Returns: A `[String: Any]` JSON dictionary representing the ``DataDict``.
-  public func asJSONDictionary() -> [String: Any] {
+  internal func asJSONDictionary() -> [String: Any] {
     _data.mapValues(convert(value:))
   }
 

apollo-ios/Sources/Apollo/JSONConvert.swift

@@ -0,0 +1,21 @@
+import Foundation
+#if !COCOAPODS
+import ApolloAPI
+#endif
+
+public enum JSONConvert {
+
+  /// Converts a ``SelectionSet`` into a basic JSON dictionary for use.
+  ///
+  /// - Returns: A `[String: Any]` JSON dictionary representing the ``SelectionSet``.
+  public static func selectionSetToJSONObject(_ selectionSet: some SelectionSet) -> [String: Any] {
+    selectionSet.__data.asJSONDictionary()
+  }
+
+  /// Converts a ``GraphQLResult`` into a basic JSON dictionary for use.
+  ///
+  /// - Returns: A `[String: Any]` JSON dictionary representing the ``GraphQLResult``.
+  public static func graphQLResultToJSONObject<T>(_ result: GraphQLResult<T>) -> [String: Any] {
+    result.asJSONDictionary()
+  }
+}