// Test aspects of the generator runtime.
-// FIXME(wingo): Replace this reference with a more official link.
// See:
-// http://wiki.ecmascript.org/lib/exe/fetch.php?cache=cache&media=harmony:es6_generator_object_model_3-29-13.png
+// http://people.mozilla.org/~jorendorff/es6-draft.html#sec-generatorfunction-objects
function f() { }
function* g() { yield 1; }
var f_desc = Object.getOwnPropertyDescriptor(f, prop);
var g_desc = Object.getOwnPropertyDescriptor(g, prop);
assertEquals(f_desc.configurable, g_desc.configurable, prop);
- assertEquals(f_desc.writable, g_desc.writable, prop);
+ if (prop === 'arguments' || prop === 'caller') {
+ // Unlike sloppy functions, which have read-only data arguments and caller
+ // properties, sloppy generators have a poison pill implemented via
+ // accessors
+ assertFalse('writable' in g_desc, prop);
+ assertTrue(g_desc.get instanceof Function, prop);
+ assertEquals(g_desc.get, g_desc.set, prop);
+ } else {
+ assertEquals(f_desc.writable, g_desc.writable, prop);
+ }
assertEquals(f_desc.enumerable, g_desc.enumerable, prop);
}
}
found_property_names.sort();
assertArrayEquals(expected_property_names, found_property_names);
+
+ iterator_desc = Object.getOwnPropertyDescriptor(GeneratorObjectPrototype,
+ Symbol.iterator);
+ assertTrue(iterator_desc !== undefined);
+ assertFalse(iterator_desc.writable);
+ assertFalse(iterator_desc.enumerable);
+ assertFalse(iterator_desc.configurable);
+
+ // The generator object's "iterator" function is just the identity.
+ assertSame(iterator_desc.value.call(42), 42);
}
TestGeneratorObjectPrototype();