1776 Inherit Generic Virtual Method Bug: Unit Test

rmadsen-ks · rmadsen-ks · commit ab531f85a1bd · 2022-10-31T15:32:57.000+01:00
Added a unit test which consists ofa python class inheriting from a C# class which has a virtual generic method. In this version, this causes a InvalidProgramException to be thrown during class creation.
diff --git a/src/testing/generictest.cs b/src/testing/generictest.cs
@@ -136,4 +136,12 @@ public static T[] EchoRange<T>(T[] items)
             return items;
         }
     }
+
+    public abstract class GenericVirtualMethodTest
+    {
+        public virtual Q VirtMethod<Q>(Q arg1)
+        {
+            return arg1;
+        }
+    }
 }
diff --git a/tests/test_subclass.py b/tests/test_subclass.py
@@ -9,7 +9,7 @@
 import System
 import pytest
 from Python.Test import (IInterfaceTest, SubClassTest, EventArgsTest,
-                         FunctionsTest)
+                         FunctionsTest, GenericVirtualMethodTest)
 from System.Collections.Generic import List
 
 
@@ -264,6 +264,12 @@ class TestX(System.Object):
     t = TestX()
     assert t.q == 1
 
+def test_virtual_generic_method():
+    class OverloadingSubclass(GenericVirtualMethodTest):
+        __namespace__ = "test_virtual_generic_method_cls"
+    obj = OverloadingSubclass()
+    assert obj.VirtMethod[int](5) == 5
+
 def test_construction_from_clr():
     import clr
     calls = []

Original file line number	Diff line number	Diff line change
`@@ -136,4 +136,12 @@ public static T[] EchoRange<T>(T[] items)`
`136`	`136`	`return items;`
`137`	`137`	`}`
`138`	`138`	`}`
	`139`	`+`
	`140`	`+ public abstract class GenericVirtualMethodTest`
	`141`	`+ {`
	`142`	`+ public virtual Q VirtMethod<Q>(Q arg1)`
	`143`	`+ {`
	`144`	`+ return arg1;`
	`145`	`+ }`
	`146`	`+ }`
`139`	`147`	`}`