feat(datastore): Add isLoaded public property in List+Model (#3296)

Author: thisisabhash

Amplify/Categories/DataStore/Model/Lazy/List+Model.swift

@@ -26,6 +26,15 @@ public class List<ModelType: Model>: Collection, Codable, ExpressibleByArrayLite
 
     /// The current state of lazily loaded list
     var loadedState: LoadedState
+    
+    /// Boolean property to check if list is loaded
+    public var isLoaded: Bool {
+        if case .loaded = loadedState {
+            return true
+        }
+        
+        return false
+    }
 
     /// The provider for fulfilling list behaviors
     let listProvider: AnyModelListProvider<Element>
@@ -61,6 +70,7 @@ public class List<ModelType: Model>: Collection, Codable, ExpressibleByArrayLite
         }
     }
 
+
     // MARK: - Initializers
 
     public init(listProvider: AnyModelListProvider<ModelType>) {

AmplifyPlugins/DataStore/Tests/AWSDataStorePluginTests/Core/ListTests.swift

@@ -8,9 +8,9 @@
 import Combine
 import XCTest
 
-@testable import Amplify
-@testable import AmplifyTestCommon
-@testable import AWSDataStorePlugin
+import Amplify
+import AmplifyTestCommon
+import AWSDataStorePlugin
 
 class ListTests: BaseDataStoreTests {
 
@@ -25,15 +25,9 @@ class ListTests: BaseDataStoreTests {
         let postId = preparePostDataForTest()
 
         func checkComments(_ comments: List<Comment>) async throws {
-            guard case .notLoaded = comments.loadedState else {
-                XCTFail("Should not be loaded")
-                return
-            }
+            XCTAssertFalse(comments.isLoaded)
             try await comments.fetch()
-            guard case .loaded = comments.loadedState else {
-                XCTFail("Should be loaded")
-                return
-            }
+            XCTAssertTrue(comments.isLoaded)
             XCTAssertEqual(comments.count, 2)
             expect.fulfill()
         }