Improvements to yaml validation

test/Test.Infrastructure/EqualityYamlNodeVisitor.cs

@@ -4,6 +4,7 @@
 
 using System;
 using System.CommandLine;
+using System.Linq;
 using Tye.Serialization;
 using YamlDotNet.RepresentationModel;
 
@@ -96,7 +97,13 @@ namespace Test.Infrastructure
 
             if (node.Children.Count < otherNode.Children.Count)
             {
-                throw new TyeYamlException($"Extra children in actual yaml mapping, Expected: ({node.Start.Line}, {node.Start.Column}). Actual: ({otherNode.Start.Line}, {otherNode.Start.Column}).");
+                throw new TyeYamlException(
+$@"Extra children in actual yaml mapping:
+    Expected: ({node.Start.Line}, {node.Start.Column})
+{string.Join(Environment.NewLine, node.Children.Select(kvp => $"      " + kvp.Key.ToString() + ": ..."))}
+    
+    Actual: ({otherNode.Start.Line}, {otherNode.Start.Column})
+{string.Join(Environment.NewLine, otherNode.Children.Select(kvp => $"      " + kvp.Key.ToString() + ": ..."))}");
             }
         }
 

test/Test.Infrastructure/YamlAssert.cs

@@ -24,7 +24,7 @@ namespace Test.Infrastructure
 
             try
             {
-                Assert.Equal(yamlStream.Documents.Count, yamlStream.Documents.Count);
+                Assert.Equal(yamlStream.Documents.Count, otherYamlStream.Documents.Count);
 
                 for (var i = 0; i < yamlStream.Documents.Count; i++)
                 {