Add WebSockets (#1423)

* Add WebSockets

* Add tests

* fix

* more tests

* Add tests

* ...

* remove IOwin

* -

* tests

* fluent

* ok

* match

* .

* byte[]

* x

* func

* func

* byte

* trans

* ...

* frameworks.........

* jmes

* xxx

* sc

src/WireMock.Net.Minimal/RequestBuilders/Request.WithWebSocket.cs

@@ -0,0 +1,48 @@
+// Copyright © WireMock.Net
+
+using System.Linq;
+using WireMock.Matchers;
+using WireMock.Matchers.Request;
+
+namespace WireMock.RequestBuilders;
+
+public partial class Request
+{
+    /// <inheritdoc />
+    public bool IsWebSocket { get; private set; }
+
+    /// <inheritdoc />
+    public IRequestBuilder WithWebSocketUpgrade(params string[] protocols)
+    {
+        _requestMatchers.Add(new RequestMessageHeaderMatcher(
+            MatchBehaviour.AcceptOnMatch,
+            MatchOperator.Or,
+            "Upgrade",
+            true,
+            new ExactMatcher(true, "websocket")
+        ));
+
+        _requestMatchers.Add(new RequestMessageHeaderMatcher(
+            MatchBehaviour.AcceptOnMatch,
+            MatchOperator.Or,
+            "Connection",
+            true,
+            new WildcardMatcher("*Upgrade*", true)
+        ));
+
+        if (protocols.Length > 0)
+        {
+            _requestMatchers.Add(new RequestMessageHeaderMatcher(
+                MatchBehaviour.AcceptOnMatch,
+                MatchOperator.Or,
+                "Sec-WebSocket-Protocol",
+                true,
+                protocols.Select(p => new ExactMatcher(true, p)).ToArray()
+            ));
+        }
+
+        IsWebSocket = true;
+
+        return this;
+    }
+}

src/WireMock.Net.Minimal/RequestBuilders/Request.cs

@@ -2,8 +2,6 @@
 
 // This source file is based on mock4net by Alexandre Victoor which is licensed under the Apache 2.0 License.
 // For more details see 'mock4net/LICENSE.txt' and 'mock4net/readme.md' in this project root.
-using System;
-using System.Collections.Generic;
 using System.Collections.ObjectModel;
 using System.Diagnostics.CodeAnalysis;
 using System.Linq;