add tests

Author: qunaibit

graalpython/com.oracle.graal.python.cext/include/cpython/abstract.h

@@ -155,7 +155,7 @@ _PyObject_FastCall(PyObject *func, PyObject *const *args, Py_ssize_t nargs)
 /* Call a callable without any arguments */
 static inline PyObject *
 _PyObject_CallNoArg(PyObject *func) {
-    return PyObject_CallObject(func, NULL);
+    return PyObject_CallObject(func, NULL); /* Truffle change: redirect to PyObject_CallObject until _PyObject_Vectorcall is implemented */
 }
 
 PyAPI_FUNC(PyObject *) _PyObject_Call_Prepend(

graalpython/com.oracle.graal.python.cext/src/object.c

@@ -433,8 +433,8 @@ PyObject * PyObject_GetAttr(PyObject *v, PyObject *name) {
     return NULL;
 }
 
-int
-_PyObject_LookupAttr(PyObject *v, PyObject *name, PyObject **result)
+// taken from CPython "Objects/object.c"
+int _PyObject_LookupAttr(PyObject *v, PyObject *name, PyObject **result)
 {
     PyTypeObject *tp = Py_TYPE(v);
 
@@ -446,6 +446,18 @@ _PyObject_LookupAttr(PyObject *v, PyObject *name, PyObject **result)
         return -1;
     }
 
+    /* Truffle change: this fast path is only applicable to cpython
+    if (tp->tp_getattro == PyObject_GenericGetAttr) {
+        *result = _PyObject_GenericGetAttrWithDict(v, name, NULL, 1);
+        if (*result != NULL) {
+            return 1;
+        }
+        if (PyErr_Occurred()) {
+            return -1;
+        }
+        return 0;
+    }
+    */
     if (tp->tp_getattro != NULL) {
         *result = (*tp->tp_getattro)(v, name);
     }
@@ -472,8 +484,8 @@ _PyObject_LookupAttr(PyObject *v, PyObject *name, PyObject **result)
     return 0;
 }
 
-int
-_PyObject_LookupAttrId(PyObject *v, _Py_Identifier *name, PyObject **result)
+// taken from CPython "Objects/object.c"
+int _PyObject_LookupAttrId(PyObject *v, _Py_Identifier *name, PyObject **result)
 {
     PyObject *oname = _PyUnicode_FromId(name); /* borrowed */
     if (!oname) {

graalpython/com.oracle.graal.python.test/src/tests/cpyext/test_functions.py

@@ -147,6 +147,15 @@ def forgiving_len(o):
         argspec="OOO",
         callfunction="wrap_PyObject_Call",
     )
+    test__PyObject_CallNoArg = CPyExtFunction(
+        lambda args: args[0](),
+        lambda: (
+            (dict, ),
+            (list, ),
+        ),
+        arguments=["PyObject* callable"],
+        argspec="O",
+    )
     test_PyObject_CallObject = CPyExtFunction(
         lambda args: args[0](*args[1]),
         lambda: (