handle disposed cancellation token (#1163)

docs/serializer-settings.md

@@ -135,7 +135,7 @@ var settings = new JsonSerializerSettings
     DefaultValueHandling = DefaultValueHandling.Ignore
 };
 ```
-<sup><a href='/src/Verify/Serialization/SerializationSettings.cs#L81-L90' title='Snippet source file'>snippet source</a> | <a href='#snippet-defaultserialization' title='Start of snippet'>anchor</a></sup>
+<sup><a href='/src/Verify/Serialization/SerializationSettings.cs#L82-L91' title='Snippet source file'>snippet source</a> | <a href='#snippet-defaultserialization' title='Start of snippet'>anchor</a></sup>
 <!-- endSnippet -->
 
 

src/Directory.Build.props

@@ -2,7 +2,7 @@
 <Project>
   <PropertyGroup>
     <NoWarn>CS1591;CS0649;xUnit1026;xUnit1013;CS1573;VerifyTestsProjectDir;VerifySetParameters</NoWarn>
-    <Version>23.5.0</Version>
+    <Version>23.5.1</Version>
     <ImplicitUsings>enable</ImplicitUsings>
     <LangVersion>preview</LangVersion>
     <AssemblyVersion>1.0.0</AssemblyVersion>

src/StrictJsonTests/SerializationTests.CancellationToken_Cancelled.verified.json

@@ -0,0 +1,10 @@
+{
+  "IsCancellationRequested": true,
+  "Token": true,
+  "WaitHandle": {
+    "SafeWaitHandle": {
+      "IsInvalid": false,
+      "IsClosed": false
+    }
+  }
+}

src/StrictJsonTests/SerializationTests.CancellationToken_CancelledDisposed.verified.json

@@ -0,0 +1,4 @@
+{
+  "IsCancellationRequested": true,
+  "Token": true
+}

src/Verify.Tests/Serialization/SerializationTests.CancellationToken_Cancelled.verified.txt

@@ -0,0 +1,10 @@
+{
+  IsCancellationRequested: true,
+  Token: true,
+  WaitHandle: {
+    SafeWaitHandle: {
+      IsInvalid: false,
+      IsClosed: false
+    }
+  }
+}

src/Verify.Tests/Serialization/SerializationTests.CancellationToken_CancelledDisposed.verified.txt

@@ -0,0 +1,4 @@
+{
+  IsCancellationRequested: true,
+  Token: true
+}

src/Verify.Tests/Serialization/SerializationTests.cs

@@ -3894,4 +3894,22 @@ public class Child
     {
         public Parent Parent { get; set; }
     }
+
+    [Fact]
+    public async Task CancellationToken_Cancelled()
+    {
+        var cancelSource = new CancelSource();
+        cancelSource.Cancel();
+        await Verify(cancelSource.Token);
+    }
+
+    [Fact]
+    public async Task CancellationToken_CancelledDisposed()
+    {
+        var cancelSource = new CancelSource();
+        cancelSource.Cancel();
+        var token = cancelSource.Token;
+        cancelSource.Dispose();
+        await Verify(token);
+    }
 }

src/Verify/Serialization/Converters/CancelConverter.cs

@@ -0,0 +1,20 @@
+class CancelConverter :
+    WriteOnlyJsonConverter<Cancel>
+{
+    public override void Write(VerifyJsonWriter writer, Cancel value)
+    {
+        writer.WriteStartObject();
+
+        writer.WriteMember(value, value.IsCancellationRequested, "IsCancellationRequested");
+        writer.WriteMember(value, value.CanBeCanceled, "Token");
+        try
+        {
+            writer.WriteMember(value, value.WaitHandle, "WaitHandle");
+        }
+        catch (ObjectDisposedException)
+        {
+        }
+
+        writer.WriteEndObject();
+    }
+}

src/Verify/Serialization/SerializationSettings.cs

@@ -21,6 +21,7 @@ partial class SerializationSettings
     static MethodInfoConverter methodInfoConverter = new();
     static FieldInfoConverter fieldInfoConverter = new();
     static ConstructorInfoConverter constructorInfoConverter = new();
+    static CancelConverter cancelConverter = new();
     static ParameterInfoConverter parameterInfoConverter = new();
     static PropertyInfoConverter propertyInfoConverter = new();
     static ClaimConverter claimConverter = new();
@@ -108,6 +109,7 @@ JsonSerializerSettings BuildSettings()
         converters.Add(methodInfoConverter);
         converters.Add(fieldInfoConverter);
         converters.Add(constructorInfoConverter);
+        converters.Add(cancelConverter);
         converters.Add(propertyInfoConverter);
         converters.Add(parameterInfoConverter);
         converters.Add(claimConverter);