Enables clean VM shutdown.

runtime/vm/metrics_test.cc

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/assert.h"
 
 #include "vm/dart_api_impl.h"
 #include "vm/dart_api_state.h"
 #include "vm/globals.h"
 #include "vm/json_stream.h"
@@ skipping 10 matching lines @@
   EXPECT_EQ(isolate, Isolate::Current());
   Metric metric;
 
   // Initialize metric.
   metric.Init(Isolate::Current(), "a.b.c", "foobar", Metric::kCounter);
   EXPECT_EQ(0, metric.value());
   metric.increment();
   EXPECT_EQ(1, metric.value());
   metric.set_value(44);
   EXPECT_EQ(44, metric.value());
+
+  Dart::ShutdownIsolate();
 }
 
 class MyMetric : public Metric {
  protected:
   int64_t Value() const {
     // 99 bytes.
     return 99;
   }
 
  public:
   // Just used for testing.
   int64_t LeakyValue() const { return Value(); }
 };
 
 UNIT_TEST_CASE(Metric_OnDemand) {
   Isolate::Flags vm_flags;
   Dart_IsolateFlags api_flags;
   vm_flags.CopyTo(&api_flags);
   Isolate* isolate = Isolate::Init(NULL, api_flags);
   EXPECT_EQ(isolate, Isolate::Current());
-  StackZone zone(isolate);
-  HANDLESCOPE(isolate);
-  MyMetric metric;
+  {
+    StackZone zone(isolate);
+    HANDLESCOPE(isolate);
+    MyMetric metric;
 
-  metric.Init(Isolate::Current(), "a.b.c", "foobar", Metric::kByte);
-  // value is still the default value.
-  EXPECT_EQ(0, metric.value());
-  // Call LeakyValue to confirm that Value returns constant 99.
-  EXPECT_EQ(99, metric.LeakyValue());
+    metric.Init(Isolate::Current(), "a.b.c", "foobar", Metric::kByte);
+    // value is still the default value.
+    EXPECT_EQ(0, metric.value());
+    // Call LeakyValue to confirm that Value returns constant 99.
+    EXPECT_EQ(99, metric.LeakyValue());
 
-  // Serialize to JSON.
-  JSONStream js;
-  metric.PrintJSON(&js);
-  const char* json = js.ToCString();
-  EXPECT_STREQ("{\"type\":\"Counter\",\"name\":\"a.b.c\",\"description\":"
-               "\"foobar\",\"unit\":\"byte\","
-               "\"fixedId\":true,\"id\":\"metrics\\/native\\/a.b.c\""
-               ",\"value\":99.000000}", json);
+    // Serialize to JSON.
+    JSONStream js;
+    metric.PrintJSON(&js);
+    const char* json = js.ToCString();
+    EXPECT_STREQ("{\"type\":\"Counter\",\"name\":\"a.b.c\",\"description\":"
+                 "\"foobar\",\"unit\":\"byte\","
+                 "\"fixedId\":true,\"id\":\"metrics\\/native\\/a.b.c\""
+                 ",\"value\":99.000000}", json);
+  }
+  Dart::ShutdownIsolate();
 }
 
 }  // namespace dart