Add GraphQL Schema matching (#964)

* Add GrapQLMatcher

* tests

* x

* .

* .

* RequestMessageGraphQLMatcher

* .

* more tests

* tests

* ...

* ms

* .

* more tests

* GraphQL.NET !!!

* .

* executionResult

* nw

* sonarcloud

test/WireMock.Net.Tests/RequestBuilders/RequestBuilderWithGraphQLSchemaTests.cs

@@ -0,0 +1,71 @@
+#if GRAPHQL
+using System.Collections.Generic;
+using FluentAssertions;
+using GraphQL.Types;
+using WireMock.Matchers;
+using WireMock.Matchers.Request;
+using WireMock.RequestBuilders;
+using Xunit;
+
+namespace WireMock.Net.Tests.RequestBuilders;
+
+public class RequestBuilderWithGraphQLSchemaTests
+{
+    private const string TestSchema = @"
+  input MessageInput {
+    content: String
+    author: String
+  }
+
+  type Message {
+    id: ID!
+    content: String
+    author: String
+  }
+
+  type Mutation {
+    createMessage(input: MessageInput): Message
+    updateMessage(id: ID!, input: MessageInput): Message
+  }
+
+  type Query {
+   greeting:String
+   students:[Student]
+   studentById(id:ID!):Student
+  }
+
+  type Student {
+   id:ID!
+   firstName:String
+   lastName:String
+   fullName:String 
+  }";
+
+    [Fact]
+    public void RequestBuilder_WithGraphQLSchema_SchemaAsString()
+    {
+        // Act
+        var requestBuilder = (Request)Request.Create().WithGraphQLSchema(TestSchema);
+
+        // Assert
+        var matchers = requestBuilder.GetPrivateFieldValue<IList<IRequestMatcher>>("_requestMatchers");
+        matchers.Should().HaveCount(1);
+        ((RequestMessageGraphQLMatcher)matchers[0]).Matchers.Should().ContainItemsAssignableTo<GraphQLMatcher>();
+    }
+
+    [Fact]
+    public void RequestBuilder_WithGraphQLSchema_SchemaAsISchema()
+    {
+        // Arrange
+        var schema = Schema.For(TestSchema);
+
+        // Act
+        var requestBuilder = (Request)Request.Create().WithGraphQLSchema(schema);
+
+        // Assert
+        var matchers = requestBuilder.GetPrivateFieldValue<IList<IRequestMatcher>>("_requestMatchers");
+        matchers.Should().HaveCount(1);
+        ((RequestMessageGraphQLMatcher)matchers[0]).Matchers.Should().ContainItemsAssignableTo<GraphQLMatcher>();
+    }
+}
+#endif