PY-53643 Missing "async" statement when pulling method up as abstract

GitOrigin-RevId: fa2b7329d462abaf71eb61d33f6b30c931a26a2f

python/python-psi-impl/src/com/jetbrains/python/psi/impl/PyFunctionBuilder.java

@@ -69,6 +69,9 @@ public class PyFunctionBuilder {
         }
       }
     }
+    if (source.isAsync()) {
+      functionBuilder.makeAsync();
+    }
     functionBuilder.myDocStringGenerator = PyDocstringGenerator.forDocStringOwner(source);
     return functionBuilder;
   }

python/testData/refactoring/pullup/abstractAsyncMethod/Class.after.py

@@ -0,0 +1,6 @@
+from SuperClass import Parent
+
+class Child(Parent):
+    async def async_method(self):
+        """An async method that should be pulled up"""
+        return "result"

python/testData/refactoring/pullup/abstractAsyncMethod/Class.py

@@ -0,0 +1,6 @@
+from SuperClass import Parent
+
+class Child(Parent):
+    async def async_method(self):
+        """An async method that should be pulled up"""
+        return "result"

python/testData/refactoring/pullup/abstractAsyncMethod/SuperClass.after.py

@@ -0,0 +1,8 @@
+from abc import ABCMeta, abstractmethod
+
+
+class Parent(metaclass=ABCMeta):
+    @abstractmethod
+    async def async_method(self):
+        """An async method that should be pulled up"""
+        pass

python/testData/refactoring/pullup/abstractAsyncMethod/SuperClass.py

@@ -0,0 +1,2 @@
+class Parent:
+    pass

python/testSrc/com/jetbrains/python/refactoring/classes/pullUp/PyPullUpTest.java

@@ -143,6 +143,13 @@ public class PyPullUpTest extends PyClassRefactoringTest {
     checkAbstract(".my_method", ".my_class_method");
   }
 
+  /**
+   * Ensures that pulling async method up as abstract preserves the async keyword
+   */
+  public void testAbstractAsyncMethod() {
+    checkAbstract(".async_method");
+  }
+
   /**
    * Moves methods fromn Child to Parent and make them abstract
    * @param methodNames methods to check