Update readme for Methods accessible (#690)

* Add information to readme for breaking change in 1.3.0

* readme

Author: StefH

README.md

@@ -30,12 +30,29 @@ int c = 10;
 db.Customers.WhereInterpolated($"City == {cityName} and Orders.Count >= {c}");
 ```
 
+## :exclamation: Breaking changes
+
+### v1.3.0
+A breaking change is introduced in version 1.3.0 which is related to calling methods on classes.
+Due to security reasons, it's now only allowed to call methods on the standard predefined classes like (`bool`, `int`, `string` ...).
+If you want to call a method on an own custom class, annotate that class with the [DynamicLinqType](https://dynamic-linq.net/advanced-extending#dynamiclinqtype-attribute).
+Example:
+``` c#
+[DynamicLinqType]
+public class MyCustomClass
+{
+    public int GetAge(int x) => x;
+}
+```
+
+If it's not possible to add that attribute, you need to implement a custom [CustomTypeProvider](https://dynamic-linq.net/advanced-configuration#customtypeprovider) and set this to the `ParsingConfig` and provide that config to the dynamic call.
+
 ## Useful links
 
-- [Website](https://dynamic-linq.net/)
+- [Website](https://dynamic-linq.net)
 - [Documentation](https://dynamic-linq.net/overview)
 - [Online examples](https://dynamic-linq.net/online-examples)
-- [nuget](https://www.nuget.org/packages/System.Linq.Dynamic.Core/) 
+- [NuGet](https://www.nuget.org/packages/System.Linq.Dynamic.Core)
 
 ## Info
 | | |

test/System.Linq.Dynamic.Core.Tests/DynamicExpressionParserTests.cs

@@ -77,6 +77,23 @@ public class CustomClassWithStaticMethod
         public static int GetAge(int x) => x;
     }
 
+    public class CustomClassWithMethod
+    {
+        public int GetAge(int x) => x;
+    }
+
+    [DynamicLinqType]
+    public class CustomClassWithMethodWithDynamicLinqTypeAttribute
+    {
+        public int GetAge(int x) => x;
+    }
+
+    [DynamicLinqType]
+    public class CustomClassWithStaticMethodWithDynamicLinqTypeAttribute
+    {
+        public static int GetAge(int x) => x;
+    }
+
     public class CustomTextClass
     {
         public CustomTextClass(string origin)
@@ -1010,7 +1027,7 @@ public void DynamicExpressionParser_ParseLambda_TupleToStringMethodCall_ReturnsS
     }
 
     [Fact]
-    public void DynamicExpressionParser_ParseLambda_CustomMethod()
+    public void DynamicExpressionParser_ParseLambda_CustomStaticMethod_WhenClassIsReturnedByCustomTypeProvider_ShouldWorkCorrect()
     {
         // Assign
         var config = new ParsingConfig
@@ -1030,6 +1047,51 @@ public void DynamicExpressionParser_ParseLambda_CustomMethod()
         Check.That(result).IsEqualTo(10);
     }
 
+    [Fact]
+    public void DynamicExpressionParser_ParseLambda_CustomStaticMethod_WhenClassHasDynamicLinqTypeAttribute_ShouldWorkCorrect()
+    {
+        // Assign
+        var context = new CustomClassWithStaticMethodWithDynamicLinqTypeAttribute();
+        var expression = $"{nameof(CustomClassWithStaticMethodWithDynamicLinqTypeAttribute)}.{nameof(CustomClassWithStaticMethodWithDynamicLinqTypeAttribute.GetAge)}(10)";
+
+        // Act
+        var lambdaExpression = DynamicExpressionParser.ParseLambda(typeof(CustomClassWithStaticMethodWithDynamicLinqTypeAttribute), null, expression);
+        var del = lambdaExpression.Compile();
+        var result = (int)del.DynamicInvoke(context);
+
+        // Assert
+        Check.That(result).IsEqualTo(10);
+    }
+
+    [Fact]
+    public void DynamicExpressionParser_ParseLambda_CustomMethod_WhenClassHasDynamicLinqTypeAttribute_ShouldWorkCorrect()
+    {
+        // Assign
+        var context = new CustomClassWithMethodWithDynamicLinqTypeAttribute();
+        var expression = $"{nameof(CustomClassWithMethodWithDynamicLinqTypeAttribute.GetAge)}(10)";
+
+        // Act
+        var lambdaExpression = DynamicExpressionParser.ParseLambda(typeof(CustomClassWithMethodWithDynamicLinqTypeAttribute), null, expression);
+        var del = lambdaExpression.Compile();
+        var result = (int)del.DynamicInvoke(context);
+
+        // Assert
+        Check.That(result).IsEqualTo(10);
+    }
+
+    [Fact]
+    public void DynamicExpressionParser_ParseLambda_CustomMethod_WhenClassDoesNotHaveDynamicLinqTypeAttribute_ShouldThrowException()
+    {
+        // Assign
+        var expression = $"{nameof(CustomClassWithMethod.GetAge)}(10)";
+
+        // Act
+        Action action = () => DynamicExpressionParser.ParseLambda(typeof(CustomClassWithMethod), null, expression);
+
+        // Assert
+        action.Should().Throw<ParseException>().WithMessage("Methods on type 'CustomClassWithMethod' are not accessible");
+    }
+
     // [Fact]
     public void DynamicExpressionParser_ParseLambda_With_InnerStringLiteral()
     {