Adding Angular and dependent packages for testing

third_party/pkg/perf_api/test/perf_api_test.dart

+library perf_api.noop_test;
+
+import 'dart:async';
+
+import 'package:unittest/unittest.dart';
+import 'package:perf_api/perf_api.dart';
+
+main() {
+
+  test('should be able to instantiate as a noop profiler', () {
+    expect(() => new Profiler(), returnsNormally);
+  });
+
+  group('Default Impl', () {
+    Profiler perf;
+
+    setUp(() {
+      perf = new Profiler();
+    });
+
+    test('should do noop startTimer', () {
+      expect(() => perf.startTimer('foo', 'bar'), returnsNormally);
+    });
+
+    test('should do noop stopTimer', () {
+      expect(() => perf.stopTimer('foo'), returnsNormally);
+    });
+
+    test('should do noop start/stopTimer', () {
+      expect(() {
+        var timerId = perf.startTimer('foo');
+        perf.stopTimer(timerId);
+      }, returnsNormally);
+    });
+
+    test('should do noop markTime', () {
+      expect(() => perf.markTime('foo'), returnsNormally);
+    });
+
+    test('should do noop time function', () {
+      expect(() => perf.time('foo', () {}, 'bar'), returnsNormally);
+    });
+
+    test('should do noop time future', () {
+      expect(() {
+        perf.time('foo', new Future.sync(() => null), 'bar');
+      }, returnsNormally);
+    });
+
+    group('counters', () {
+
+      test('should return null for uninitialized counter', () {
+        expect(perf.counters['foo'], null);
+      });
+
+      test('should increment counter', () {
+        perf.counters.increment('foo');
+        expect(perf.counters['foo'], 1);
+      });
+
+      test('should increment counter by given delta', () {
+        perf.counters.increment('foo', 10);
+        expect(perf.counters['foo'], 10);
+        perf.counters.increment('foo', 5);
+        expect(perf.counters['foo'], 15);
+      });
+
+      test('should set counter to provided value', () {
+        perf.counters['foo'] = 10;
+        expect(perf.counters['foo'], 10);
+      });
+
+      test('should decrement counter when delta is negative', () {
+        perf.counters['foo'] = 15;
+        perf.counters.increment('foo', -10);
+        expect(perf.counters['foo'], 5);
+      });
+
+      test('should allow negative counter values', () {
+        perf.counters['foo'] = 10;
+        perf.counters.increment('foo', -15);
+        expect(perf.counters['foo'], -5);
+      });
+
+      test('should return counters map', () {
+        perf.counters['foo'] = 1;
+        perf.counters.increment('bar', 2);
+        perf.counters['baz'] = 3;
+        expect(perf.counters.all, {
+          'foo': 1,
+          'bar': 2,
+          'baz': 3
+        });
+      });
+
+      test('should return immutable counters map', () {
+        expect(() => perf.counters.all['foo'] = 0,
+            throwsA(new isInstanceOf<UnsupportedError>()));
+        expect(() => perf.counters.all.putIfAbsent('foo', () => 0),
+            throwsA(new isInstanceOf<UnsupportedError>()));
+        expect(() => perf.counters.all.remove('foo'),
+            throwsA(new isInstanceOf<UnsupportedError>()));
+        expect(() => perf.counters.all.clear(),
+            throwsA(new isInstanceOf<UnsupportedError>()));
+        expect(() => perf.counters.all.addAll({}),
+            throwsA(new isInstanceOf<UnsupportedError>()));
+      });
+
+    });
+  });
+}