Generator objects have [[Class]] === "Generator"

test/mjsunit/harmony/generators-objects.js

Index: test/mjsunit/harmony/generators-objects.js
diff --git a/test/mjsunit/harmony/generators-objects.js b/test/mjsunit/harmony/generators-objects.js
index 0c36818c8e04df37be72f46d71d8b8f33e4fb876..de076308cd1dca398b8dfc08ab21de452aea6a6a 100644
--- a/test/mjsunit/harmony/generators-objects.js
+++ b/test/mjsunit/harmony/generators-objects.js
@@ -25,7 +25,7 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --harmony-generators --harmony-scoping
+// Flags: --harmony-generators --harmony-scoping --allow-natives-syntax
 
 // Test instantations of generators.
 
@@ -55,6 +55,8 @@ function TestGeneratorObject() {
   var iter = g();
   assertSame(g.prototype, Object.getPrototypeOf(iter));
   assertTrue(iter instanceof g);
+  assertEquals("Generator", %ClassOf(iter));
+  assertEquals("[object Generator]", String(iter));
   assertEquals([], Object.getOwnPropertyNames(iter));
   assertTrue(iter !== g());
 
@@ -62,7 +64,34 @@ function TestGeneratorObject() {
   iter = new g();
   assertSame(g.prototype, Object.getPrototypeOf(iter));
   assertTrue(iter instanceof g);
+  assertEquals("Generator", %ClassOf(iter));
+  assertEquals("[object Generator]", String(iter));
   assertEquals([], Object.getOwnPropertyNames(iter));
   assertTrue(iter !== new g());
 }
 TestGeneratorObject();
+
+
+// Test the methods of generator objects.
+function TestGeneratorObjectMethods() {
+  function* g() { yield 1; }
+  var iter = g();
+
+  function TestNonGenerator(non_generator) {
+    non_generator.next = iter.next;
+    non_generator.send = iter.send;
+    non_generator.throw = iter.throw;
+    non_generator.close = iter.close;

[Michael Starzinger, 2013/04/17 14:31:28]

I think the four assignments here are obsolete now.

+    assertThrows(function() { iter.next.call(non_generator); }, TypeError);
+    assertThrows(function() { iter.send.call(non_generator, 1); }, TypeError);
+    assertThrows(function() { iter.throw.call(non_generator, 1); }, TypeError);
+    assertThrows(function() { iter.close.call(non_generator); }, TypeError);
+  }
+
+  TestNonGenerator(1);
+  TestNonGenerator({});
+  TestNonGenerator(function(){});
+  TestNonGenerator(g);
+  TestNonGenerator(g.prototype);
+}
+TestGeneratorObjectMethods();