Expose Value::IsMap, IsSet, IsWeakMap, IsWeakSet in V8 API.

test/cctest/test-api.cc

Index: test/cctest/test-api.cc
diff --git a/test/cctest/test-api.cc b/test/cctest/test-api.cc
index f61400706b35bb7bfadb72aaa8b0b6d4663eade5..a1c2f20331a1185384f4ca243de436140ceb9e39 100644
--- a/test/cctest/test-api.cc
+++ b/test/cctest/test-api.cc
@@ -1554,6 +1554,42 @@ THREADED_TEST(ArgumentsObject) {
 }
 
 
+THREADED_TEST(IsMapOrSet) {
+  LocalContext env;
+  v8::HandleScope scope(env->GetIsolate());
+  v8::Handle<Value> map = CompileRun("new Map()");
+  v8::Handle<Value> set = CompileRun("new Set()");
+  v8::Handle<Value> weak_map = CompileRun("new WeakMap()");
+  v8::Handle<Value> weak_set = CompileRun("new WeakSet()");
+  CHECK(map->IsMap());
+  CHECK(set->IsSet());
+  CHECK(weak_map->IsWeakMap());
+  CHECK(weak_set->IsWeakSet());
+
+  CHECK(!map->IsSet());
+  CHECK(!map->IsWeakMap());
+  CHECK(!map->IsWeakSet());
+
+  CHECK(!set->IsMap());
+  CHECK(!set->IsWeakMap());
+  CHECK(!set->IsWeakSet());
+
+  CHECK(!weak_map->IsMap());
+  CHECK(!weak_map->IsSet());
+  CHECK(!weak_map->IsWeakSet());
+
+  CHECK(!weak_set->IsMap());
+  CHECK(!weak_set->IsSet());
+  CHECK(!weak_set->IsWeakMap());
+
+  v8::Handle<Value> object = CompileRun("{a:42}");
+  CHECK(!object->IsMap());
+  CHECK(!object->IsSet());
+  CHECK(!object->IsWeakMap());
+  CHECK(!object->IsWeakSet());
+}
+
+
 THREADED_TEST(StringObject) {
   LocalContext env;
   v8::HandleScope scope(env->GetIsolate());