PY-13159 Fixed: "Type checker" failed to determine property type

Support abc.abstractproperty while processing class decorated properties

python/src/com/jetbrains/python/psi/impl/PyClassImpl.java

@@ -764,7 +764,8 @@ public class PyClassImpl extends PyBaseElementImpl<PyClassStub> implements PyCla
                   decoName = knownName;
                 }
               }
-              if (PyNames.PROPERTY.equals(decoName)) {
+              if (PyNames.PROPERTY.equals(decoName) ||
+                  qname.equals(PyKnownDecoratorUtil.KnownDecorator.ABC_ABSTRACTPROPERTY.getQualifiedName())) {
                 getter = new Maybe<>(method);
               }
               else if (useAdvancedSyntax && qname.matches(decoratorName, PyNames.GETTER)) {

python/testSrc/com/jetbrains/python/PyTypeTest.java

@@ -1461,6 +1461,17 @@ public class PyTypeTest extends PyTestCase {
            "expr = float.fromhex(\"0.5\")");
   }
 
+  // PY-13159
+  public void testAbsAbstractProperty() {
+    doTest("str",
+           "import abc\n" +
+           "class D:\n" +
+           "    @abc.abstractproperty\n" +
+           "    def foo(self):\n" +
+           "        return 'foo'\n" +
+           "expr = D().foo");
+  }
+
   // PY-20409
   public void testGetFromDictWithDefaultNoneValue() {
     doTest("Any",