Fixed result formatting when non-null root field becomes null. (#6844)

Author: michaelstaib

src/CookieCrumble/src/CookieCrumble/Snapshot.cs

@@ -14,7 +14,7 @@
 
 namespace CookieCrumble;
 
-public sealed class Snapshot
+public class Snapshot
 {
     private static readonly object _sync = new();
     private static readonly UTF8Encoding _encoding = new();
@@ -49,6 +49,9 @@ public Snapshot(string? postFix = null, string? extension = null)
 
     public static Snapshot Create(string? postFix = null, string? extension = null)
         => new(postFix, extension);
+    
+    public static DisposableSnapshot Start(string? postFix = null, string? extension = null)
+        => new(postFix, extension);
 
     public static void Match(
         object? value,
@@ -474,3 +477,10 @@ public SnapshotSegment(string? name, object? value, ISnapshotValueFormatter form
         public ISnapshotValueFormatter Formatter { get; }
     }
 }
+
+public sealed class DisposableSnapshot(string? postFix = null, string? extension = null)
+    : Snapshot(postFix, extension)
+    , IDisposable
+{
+    public void Dispose() => Match();
+}

src/HotChocolate/AspNetCore/test/AspNetCore.Authorization.Tests/__snapshots__/AuthorizationHandlerTests.Authorize_NoDefaultPolicy.snap

@@ -15,5 +15,6 @@
         "code": "AUTH_NO_DEFAULT_POLICY"
       }
     }
-  ]
+  ],
+  "data": null
 }

src/HotChocolate/AspNetCore/test/AspNetCore.Authorization.Tests/__snapshots__/AuthorizationHandlerTests.Authorize_NotAllowed.snap

@@ -15,5 +15,6 @@
         "code": "AUTH_NOT_AUTHORIZED"
       }
     }
-  ]
+  ],
+  "data": null
 }

src/HotChocolate/AspNetCore/test/AspNetCore.Authorization.Tests/__snapshots__/AuthorizationHandlerTests.Authorize_NotAuthenticated.snap

@@ -15,5 +15,6 @@
         "code": "AUTH_NOT_AUTHENTICATED"
       }
     }
-  ]
+  ],
+  "data": null
 }

src/HotChocolate/AspNetCore/test/AspNetCore.Authorization.Tests/__snapshots__/AuthorizationHandlerTests.Authorize_PolicyNotFound.snap

@@ -15,5 +15,6 @@
         "code": "AUTH_POLICY_NOT_FOUND"
       }
     }
-  ]
+  ],
+  "data": null
 }

src/HotChocolate/AspNetCore/test/AspNetCore.Authorization.Tests/__snapshots__/AuthorizeSchemaTests.AuthorizeOnExtension.snap

@@ -15,5 +15,6 @@
         "code": "AUTH_NOT_AUTHORIZED"
       }
     }
-  ]
+  ],
+  "data": null
 }

src/HotChocolate/Caching/test/Caching.Tests/__snapshots__/HttpCachingTests.MaxAgeAndScope_Should_Cache.snap

@@ -15,5 +15,5 @@
       ]
     }
   ],
-  "Body": "{\"data\":{\"field\":\"\"}}"
+  "Body": "{}"
 }

src/HotChocolate/Caching/test/Caching.Tests/__snapshots__/HttpCachingTests.MaxAge_NonZero_Should_Cache.snap

@@ -15,5 +15,5 @@
       ]
     }
   ],
-  "Body": "{\"data\":{\"field\":\"\"}}"
+  "Body": "{}"
 }

src/HotChocolate/Caching/test/Caching.Tests/__snapshots__/HttpCachingTests.MaxAge_Zero_Should_Cache.snap

@@ -15,5 +15,5 @@
       ]
     }
   ],
-  "Body": "{\"data\":{\"field\":\"\"}}"
+  "Body": "{}"
 }

src/HotChocolate/Core/src/Abstractions/Execution/IQueryResult.cs

@@ -62,6 +62,12 @@ public interface IQueryResult : IExecutionResult
     /// </summary>
     /// <value></value>
     bool? HasNext { get; }
+    
+    /// <summary>
+    /// Specifies if data was explicitly set.
+    /// If <c>false</c> the data was not set (including null).
+    /// </summary>
+    bool IsDataSet { get; }
 
     /// <summary>
     /// Serializes this GraphQL result into a dictionary.