Changed Model load/save method

src/Caliban.Nano/Caliban.Nano.csproj

@@ -20,7 +20,7 @@
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
     <Company>Caliban.Nano</Company>
     <PackageTags>caliban;nano;wpf;mvvm;framework;dependency-injection;event-aggregation;service-locator;automatic-binding</PackageTags>
-    <VersionPrefix>1.5.1</VersionPrefix>
+    <VersionPrefix>1.5.2</VersionPrefix>
     <GenerateDocumentationFile>True</GenerateDocumentationFile>
     <DocumentationFile>..\..\docs\api.xml</DocumentationFile>
   </PropertyGroup>

src/Caliban.Nano/Contracts/IModel.cs

@@ -15,13 +15,13 @@ public interface IModel : INotifyPropertyChanged
         /// <summary>
         /// (Awaitable) Loads the model and resets changed state.
         /// </summary>
-        /// <returns>An asynchronous task.</returns>
-        Task Load();
+        /// <returns>True if loading was successful; otherwise false.</returns>
+        Task<bool> Load();
 
         /// <summary>
         /// (Awaitable) Saves the model and resets changed state.
         /// </summary>
-        /// <returns>An asynchronous task.</returns>
-        Task Save();
+        /// <returns>True if saving was successful; otherwise false.</returns>
+        Task<bool> Save();
     }
 }

src/Caliban.Nano/Data/Model.cs

@@ -29,15 +29,15 @@ public Model()
         }
 
         /// <inheritdoc />
-        public virtual Task Load()
+        public virtual Task<bool> Load()
         {
-            return Task.Run(() => HasChanged = false);
+            return Task.Run(() => !(HasChanged = false));
         }
 
         /// <inheritdoc />
-        public virtual Task Save()
+        public virtual Task<bool> Save()
         {
-            return Task.Run(() => HasChanged = false);
+            return Task.Run(() => !(HasChanged = false));
         }
 
         /// <summary>

tests/Caliban.Nano.Tests/Data/ModelTests.cs

@@ -53,9 +53,7 @@ public async Task LoadTest()
             mock.SetHasChanged(true);
 
             Assert.IsTrue(mock.HasChanged);
-
-            await mock.Load();
-
+            Assert.IsTrue(await mock.Load());
             Assert.IsFalse(mock.HasChanged);
         }
 
@@ -67,9 +65,7 @@ public async Task SaveTest()
             mock.SetHasChanged(true);
 
             Assert.IsTrue(mock.HasChanged);
-
-            await mock.Save();
-
+            Assert.IsTrue(await mock.Save());
             Assert.IsFalse(mock.HasChanged);
         }