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runtime/observatory/tests/service/native_metrics_test.dart

 // Copyright (c) 2015, 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.
 // VMOptions=--error_on_bad_type --error_on_bad_override
 
 import 'package:observatory/service_io.dart';
 import 'package:unittest/unittest.dart';
 import 'test_helper.dart';
 
 import 'dart:developer';
 
 void script() {
   var counter = new Counter('a.b.c', 'description');
   Metrics.register(counter);
   counter.value = 1234.5;
 }
 
 var tests = [
-
   (Isolate isolate) async {
     Map metrics = await isolate.refreshNativeMetrics();
     expect(metrics.length, greaterThan(1));
     expect(metrics.length, greaterThan(1));
-    var foundOldHeapCapacity = metrics.values.any(
-        (m) => m.name == 'heap.old.capacity');
+    var foundOldHeapCapacity =
+        metrics.values.any((m) => m.name == 'heap.old.capacity');
     expect(foundOldHeapCapacity, equals(true));
   },
-
   (Isolate isolate) async {
-    var params = { 'metricId': 'metrics/native/heap.old.used' };
+    var params = {'metricId': 'metrics/native/heap.old.used'};
     ServiceMetric counter =
-      await isolate.invokeRpc('_getIsolateMetric', params);
+        await isolate.invokeRpc('_getIsolateMetric', params);
     expect(counter.type, equals('Counter'));
     expect(counter.name, equals('heap.old.used'));
   },
-
   (Isolate isolate) async {
     bool caughtException;
     try {
-      await isolate.invokeRpc('_getIsolateMetric',
-                              { 'metricId': 'metrics/native/doesnotexist' });
-      expect(false, isTrue, reason:'Unreachable');
+      await isolate.invokeRpc(
+          '_getIsolateMetric', {'metricId': 'metrics/native/doesnotexist'});
+      expect(false, isTrue, reason: 'Unreachable');
     } on ServerRpcException catch (e) {
       caughtException = true;
       expect(e.code, equals(ServerRpcException.kInvalidParams));
-      expect(e.message,
-             "_getIsolateMetric: invalid 'metricId' "
-             "parameter: metrics/native/doesnotexist");
+      expect(
+          e.message,
+          "_getIsolateMetric: invalid 'metricId' "
+          "parameter: metrics/native/doesnotexist");
     }
     expect(caughtException, isTrue);
   },
-
 ];
 
 main(args) => runIsolateTests(args, tests, testeeBefore: script);