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/Matchers/GraphQLMatcherTests.cs

@@ -0,0 +1,142 @@
+#if GRAPHQL
+using System;
+using FluentAssertions;
+using GraphQLParser.Exceptions;
+using WireMock.Matchers;
+using WireMock.Models;
+using Xunit;
+
+namespace WireMock.Net.Tests.Matchers;
+
+public class GraphQLMatcherTests
+{
+    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 GraphQLMatcher_For_ValidSchema_And_CorrectQuery_IsMatch()
+    {
+        // Arrange
+        var input = "{\"query\":\"{\\r\\n students {\\r\\n fullName\\r\\n id\\r\\n }\\r\\n}\"}";
+
+        // Act
+        var matcher = new GraphQLMatcher(TestSchema);
+        var result = matcher.IsMatch(input);
+
+        // Assert
+        result.Should().Be(MatchScores.Perfect);
+
+        matcher.GetPatterns().Should().Contain(TestSchema);
+    }
+
+    [Fact]
+    public void GraphQLMatcher_For_ValidSchema_And_CorrectGraphQLQuery_IsMatch()
+    {
+        // Arrange
+        var input = @"{
+	""query"": ""query ($sid: ID!)\r\n{\r\n studentById(id: $sid) {\r\n fullName\r\n id\r\n }\r\n}"",
+	""variables"": {
+		""sid"": ""1""
+	}
+}";
+        // Act
+        var matcher = new GraphQLMatcher(TestSchema);
+        var result = matcher.IsMatch(input);
+
+        // Assert
+        result.Should().Be(MatchScores.Perfect);
+
+        matcher.GetPatterns().Should().Contain(TestSchema);
+    }
+
+    [Fact]
+    public void GraphQLMatcher_For_ValidSchema_And_IncorrectQuery_IsMismatch()
+    {
+        // Arrange
+        var input = @"
+{
+  students {
+    fullName
+    id
+    abc
+  }
+}";
+        // Act
+        var matcher = new GraphQLMatcher(TestSchema);
+        var result = matcher.IsMatch(input);
+
+        // Assert
+        result.Should().Be(MatchScores.Mismatch);
+    }
+
+    [Fact]
+    public void GraphQLMatcher_For_ValidSchemaAsStringPattern_And_CorrectQuery_IsMatch()
+    {
+        // Arrange
+        var input = "{\"query\":\"{\\r\\n students {\\r\\n fullName\\r\\n id\\r\\n }\\r\\n}\"}";
+        var schema = new StringPattern
+        {
+            Pattern = TestSchema
+        };
+
+        // Act
+        var matcher = new GraphQLMatcher(schema);
+        var result = matcher.IsMatch(input);
+
+        // Assert
+        result.Should().Be(MatchScores.Perfect);
+    }
+
+    [Fact]
+    public void GraphQLMatcher_For_ValidSchema_And_IncorrectQueryWithError_WithThrowExceptionTrue_ThrowsException()
+    {
+        // Arrange
+        var input = "{\"query\":\"{\\r\\n studentsX {\\r\\n fullName\\r\\n X\\r\\n }\\r\\n}\"}";
+
+        // Act
+        var matcher = new GraphQLMatcher(TestSchema, MatchBehaviour.AcceptOnMatch, true);
+        Action action = () => matcher.IsMatch(input);
+
+        // Assert
+        action.Should().Throw<Exception>();
+    }
+
+    [Fact]
+    public void GraphQLMatcher_For_InvalidSchema_ThrowsGraphQLSyntaxErrorException()
+    {
+        // Act
+        // ReSharper disable once ObjectCreationAsStatement
+        Action action = () => _ = new GraphQLMatcher("in va lid");
+
+        // Assert
+        action.Should().Throw<GraphQLSyntaxErrorException>();
+    }
+}
+#endif