Add test for HPy_CallMethod

test/test_call.py

@@ -88,6 +88,44 @@ def g():
         with pytest.raises(TypeError):
             mod.call(f, kw=None)
 
+    def test_hpy_callmethod(self):
+        import pytest
+        mod = self.make_module("""
+            HPyDef_METH(call, "call", call_impl, HPyFunc_VARARGS)
+            static HPy call_impl(HPyContext *ctx, HPy self,
+                                 HPy *args, HPy_ssize_t nargs)
+            {
+
+                HPy receiver, result;
+                const char *m_name = NULL;
+                HPy *m_args = args + 2;
+                HPy_ssize_t m_nargs = nargs - 2;
+                HPyTracker ht;
+                static const char *kwlist[] = { "receiver", "name", NULL };
+                if (!HPyArg_ParseKeywords(ctx, &ht, args, nargs, HPy_NULL, "Os",
+                                          kwlist, &receiver, &m_name)) {
+                    return HPy_NULL;
+                }
+                result = HPy_CallMethod(ctx, receiver, m_name, m_args, m_nargs);
+                HPyTracker_Close(ctx, ht);
+                return result;
+            }
+            @EXPORT(call)
+            @INIT
+        """)
+
+        test_args = (
+            # (receiver, method, args_tuple)
+            ({"hello": 1, "world": 2}, "keys", tuple()),
+            ("Hello, World", "find", ("Wo", )),
+        )
+        for receiver, method, args_tuple in test_args:
+            assert mod.call(receiver, method, *args_tuple) == getattr(receiver, method)(*args_tuple)
+        with pytest.raises(TypeError):
+            mod.call("Receiver", "find", 1, 2, 3, 4)
+        with pytest.raises(AttributeError):
+            mod.call(None, "blah")
+
     def test_hpycallable_check(self):
         mod = self.make_module("""
             HPyDef_METH(f, "f", f_impl, HPyFunc_O)