Add tests for deriving a Python subclass from a generic interface

filmor · filmor · commit 461c9c708ce3 · 2022-11-02T07:59:03.000+01:00
diff --git a/src/testing/interfacetest.cs b/src/testing/interfacetest.cs
@@ -79,7 +79,7 @@ private interface IPrivate
         {
         }
     }
-    
+
     public interface IOutArg
     {
         string MyMethod_Out(string name, out int index);
@@ -93,4 +93,25 @@ public static int CallMyMethod_Out(IOutArg myInterface)
             return index;
         }
     }
+
+    public interface IGenericInterface<T>
+    {
+        public T Get(T x);
+    }
+
+    public class SpecificInterfaceUser
+    {
+        public SpecificInterfaceUser(IGenericInterface<int> some, int x)
+        {
+            some.Get(x);
+        }
+    }
+
+    public class GenericInterfaceUser<T>
+    {
+        public GenericInterfaceUser(IGenericInterface<T> some, T x)
+        {
+            some.Get(x);
+        }
+    }
 }
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, IGenericInterface)
 from System.Collections.Generic import List
 
 
@@ -29,6 +29,17 @@ def bar(self, x, i):
     return InterfaceTestClass
 
 
+def interface_generic_class_fixture(subnamespace):
+
+    class GenericInterfaceImpl(IGenericInterface[int]):
+        __namespace__ = "Python.Test." + subnamespace
+
+        def Get(self, x):
+            return x
+
+    return GenericInterfaceImpl
+
+
 def derived_class_fixture(subnamespace):
     """Delay creation of class until test starts."""
 
@@ -306,3 +317,13 @@ class Derived(BaseClass):
 
     import gc
     gc.collect()
+
+def test_generic_interface():
+    from System import Int32
+    from Python.Test import GenericInterfaceUser, SpecificInterfaceUser
+
+    GenericInterfaceImpl = interface_generic_class_fixture(test_generic_interface.__name__)
+
+    obj = GenericInterfaceImpl()
+    SpecificInterfaceUser(obj, Int32(0))
+    GenericInterfaceUser[Int32](obj, Int32(0))

Original file line number	Diff line number	Diff line change
`@@ -79,7 +79,7 @@ private interface IPrivate`
`79`	`79`	`{`
`80`	`80`	`}`
`81`	`81`	`}`
`82`		`-`
	`82`	`+`
`83`	`83`	`public interface IOutArg`
`84`	`84`	`{`
`85`	`85`	`string MyMethod_Out(string name, out int index);`
`@@ -93,4 +93,25 @@ public static int CallMyMethod_Out(IOutArg myInterface)`
`93`	`93`	`return index;`
`94`	`94`	`}`
`95`	`95`	`}`
	`96`	`+`
	`97`	`+ public interface IGenericInterface<T>`
	`98`	`+ {`
	`99`	`+ public T Get(T x);`
	`100`	`+ }`
	`101`	`+`
	`102`	`+ public class SpecificInterfaceUser`
	`103`	`+ {`
	`104`	`+ public SpecificInterfaceUser(IGenericInterface<int> some, int x)`
	`105`	`+ {`
	`106`	`+ some.Get(x);`
	`107`	`+ }`
	`108`	`+ }`
	`109`	`+`
	`110`	`+ public class GenericInterfaceUser<T>`
	`111`	`+ {`
	`112`	`+ public GenericInterfaceUser(IGenericInterface<T> some, T x)`
	`113`	`+ {`
	`114`	`+ some.Get(x);`
	`115`	`+ }`
	`116`	`+ }`
`96`	`117`	`}`