VM service: List all instances of a class.

runtime/vm/service_test.cc

Index: runtime/vm/service_test.cc
===================================================================
--- runtime/vm/service_test.cc	(revision 37413)
+++ runtime/vm/service_test.cc	(working copy)
@@ -836,6 +836,22 @@
   ExpectSubstringF(handler.msg(),
                    "\"id\":\"objects\\/int-%" Pd "\"",
                    b0.raw()->Size() + b1.raw()->Size());
+  // ... and list the instances of class B.
+  service_msg = EvalF(h_lib, "[0, port, ['classes', '%" Pd "', 'instances'],"
+                      "['limit'], ['3']]", class_b.id());
+  Service::HandleIsolateMessage(isolate, service_msg);
+  handler.HandleNextMessage();
+  ExpectSubstringF(handler.msg(), "\"type\":\"@Array\"");
+  // TODO(koda): Actually parse the response.
+  static const intptr_t kInstanceListId = 0;
+  ExpectSubstringF(handler.msg(), "\"id\":\"objects\\/%" Pd "\",\"length\":2",
+                   kInstanceListId);
+  Array& list = Array::Handle();
+  list ^= isolate->object_id_ring()->GetObjectForId(kInstanceListId);
+  EXPECT_EQ(2, list.Length());

[Cutch, 2014/06/18 17:23:07]

Might be good idea to have a test which verifies that limit does truncate the
list (i.e. live instances > limit).

[koda, 2014/06/18 20:55:32]

Done.

+  // The list should contain {b0, b1}.
+  EXPECT((list.At(0) == b0.raw() && list.At(1) == b1.raw()) ||
+         (list.At(0) == b1.raw() && list.At(1) == b0.raw()));
 }