Add a json method for objects.

Author: PetterS

module.c

@@ -62,8 +62,20 @@ static PyObject *object_call(ObjectData *self, PyObject *args, PyObject *kwds) {
 	return quickjs_to_python(self->context, value);
 }
 
+static PyObject *object_json(ObjectData *self) {
+	JSValue global = JS_GetGlobalObject(self->context);
+	JSValue JSON = JS_GetPropertyStr(self->context, global, "JSON");
+	JSValue stringify = JS_GetPropertyStr(self->context, JSON, "stringify");
+	JSValueConst args[1] = {self->object};
+	JSValue json_string = JS_Call(self->context, stringify, JSON, 1, args);
+	JS_FreeValue(self->context, global);
+	JS_FreeValue(self->context, JSON);
+	JS_FreeValue(self->context, stringify);
+	return quickjs_to_python(self->context, json_string);
+}
+
 static PyMethodDef object_methods[] = {
-    {NULL} /* Sentinel */
+    {"json", object_json, METH_NOARGS, "Converts to a JSON string."}, {NULL} /* Sentinel */
 };
 
 static PyTypeObject Object = {PyVarObject_HEAD_INIT(NULL, 0).tp_name = "_quickjs.Object",

test_quickjs.py

@@ -1,3 +1,4 @@
+import json
 import unittest
 
 import quickjs
@@ -46,6 +47,15 @@ def test_function(self):
             """)
         self.assertEqual(self.context.eval("special(2)"), 42)
 
+    def test_error(self):
+        with self.assertRaisesRegex(quickjs.JSException, "ReferenceError: missing is not defined"):
+            self.context.eval("missing + missing")
+
+
+class Object(unittest.TestCase):
+    def setUp(self):
+        self.context = quickjs.Context()
+
     def test_function_is_object(self):
         f = self.context.eval("""
             a = function(x) {
@@ -95,6 +105,6 @@ def test_function_call_unsupported_arg(self):
         with self.assertRaisesRegex(ValueError, "Unsupported type"):
             self.assertEqual(f({}), 42)
 
-    def test_error(self):
-        with self.assertRaisesRegex(quickjs.JSException, "ReferenceError: missing is not defined"):
-            self.context.eval("missing + missing")
+    def test_json(self):
+        d = self.context.eval("d = {data: 42};")
+        self.assertEqual(json.loads(d.json()), {"data": 42})