(#199) Fix for null reference pointer in DisposeAsync when not running live tests.

Author: Adrian Hall

tests/CommunityToolkit.Datasync.Server.EntityFrameworkCore.Test/CosmosEntityTableRepository_Tests.cs

@@ -31,7 +31,10 @@ public async Task InitializeAsync()
 
     public async Task DisposeAsync()
     {
-        await Context.DisposeAsync();
+        if (Context is not null)
+        {
+            await Context.DisposeAsync();
+        }
     }
 
     private CosmosDbContext Context { get; set; }

tests/CommunityToolkit.Datasync.Server.Test/Live/Cosmos_Controller_Tests.cs

@@ -66,7 +66,7 @@ protected override Task<string> GetRandomEntityIdAsync(bool exists)
     /// We test the 400 Bad Request client-side evaluation error here because Cosmos has more restrictions than most,
     /// so it's easier to test the code path.
     /// </summary>
-    [Fact]
+    [SkippableFact]
     public async Task ClientSideEvaluation_Produces_400BadRequest()
     {
         Skip.IfNot(CanRunLiveTests());