Add reproduction

Author: tobias-tengler

src/HotChocolate/Core/test/Validation.Tests/FieldSelectionMergingRuleTests.cs

@@ -99,6 +99,49 @@ fragment mergeIdenticalFieldsWithIdenticalValues on Dog {
             """);
     }
 
+    [Fact]
+    public void MergeIdenticalFieldsWithIdenticalInputFieldValuesButDifferentOrdering()
+    {
+        ExpectValid(
+            """
+            {
+                findDog(complex: { name: "A", owner: "B", child: { owner: "D", name: "C" } }) {
+                  name
+                }
+                ... mergeIdenticalFieldsWithIdenticalInputFieldValuesButDifferentOrdering
+            }
+
+            fragment mergeIdenticalFieldsWithIdenticalInputFieldValuesButDifferentOrdering on Query {
+                findDog(complex: { owner: "B", name: "A", child: { name: "C", owner: "D" } }) {
+                  barks
+                }
+            }
+            """);
+    }
+
+    [Fact]
+    public void ConflictingInputFieldValues()
+    {
+        ExpectErrors(
+            """
+            {
+                findDog(complex: { name: "A", owner: "OTHER", child: { owner: "D", name: "C" } }) {
+                  name
+                }
+                ... mergeIdenticalFieldsWithIdenticalInputFieldValuesButDifferentOrdering
+            }
+
+            fragment mergeIdenticalFieldsWithIdenticalInputFieldValuesButDifferentOrdering on Query {
+                findDog(complex: { owner: "B", name: "A", child: { name: "C", owner: "OTHER" } }) {
+                  barks
+                }
+            }
+            """,
+            t => Assert.Equal(
+                "Encountered fields for the same object that cannot be merged.",
+                t.Message));
+    }
+
     [Fact]
     public void ConflictingArgsOnValues()
     {

src/HotChocolate/Core/test/Validation.Tests/__snapshots__/FieldSelectionMergingRuleTests.ConflictingInputFieldValues.snap

@@ -0,0 +1,29 @@
+[
+  {
+    "Message": "Encountered fields for the same object that cannot be merged.",
+    "Code": null,
+    "Path": null,
+    "Locations": [
+      {
+        "Line": 2,
+        "Column": 5
+      },
+      {
+        "Line": 9,
+        "Column": 5
+      }
+    ],
+    "Extensions": {
+      "declaringTypeA": "Query",
+      "declaringTypeB": "Query",
+      "fieldA": "findDog",
+      "fieldB": "findDog",
+      "typeA": "Dog",
+      "typeB": "Dog",
+      "responseNameA": "findDog",
+      "responseNameB": "findDog",
+      "specifiedBy": "https://spec.graphql.org/October2021/#sec-Field-Selection-Merging"
+    },
+    "Exception": null
+  }
+]