Adding Angular and dependent packages for testing

third_party/pkg/angular/test/core/scope_spec.dart

+library scope_spec;
+
+import '../_specs.dart';
+import 'dart:convert' show JSON;
+
+
+main() {
+  describe(r'Scope', () {
+    NgZone zone;
+
+    noop() {}
+
+    beforeEach(module(() {
+      return (NgZone _zone) {
+        zone = _zone;
+        zone.onError = (e, s, l) => null;
+      };
+    }));
+
+    describe(r'$root', () {
+      it(r'should point to itself', inject((Scope $rootScope) {
+        expect($rootScope.$root).toEqual($rootScope);
+        expect($rootScope.$root).toBeTruthy();
+      }));
+
+
+      it(r'should not have $root on children, but should inherit', inject((Scope $rootScope) {
+        var child = $rootScope.$new();
+        expect(child.$root).toEqual($rootScope);
+        expect(child._$root).toBeFalsy();
+      }));
+
+    });
+
+
+    describe(r'$parent', () {
+      it(r'should point to itself in root', inject((Scope $rootScope) {
+        expect($rootScope.$root).toEqual($rootScope);
+      }));
+
+
+      it(r'should point to parent', inject((Scope $rootScope) {
+        var child = $rootScope.$new();
+        expect($rootScope.$parent).toEqual(null);
+        expect(child.$parent).toEqual($rootScope);
+        expect(child.$new().$parent).toEqual(child);
+      }));
+    });
+
+
+    describe(r'$id', () {
+      it(r'should have a unique id', inject((Scope $rootScope) {
+        expect($rootScope.$id != $rootScope.$new().$id).toBe(true);
+      }));
+    });
+
+
+    describe(r'this', () {
+      it('should have a \'this\'', inject((Scope $rootScope) {
+        expect($rootScope['this']).toEqual($rootScope);
+      }));
+    });
+
+
+    describe(r'$new()', () {
+      it(r'should create a child scope', inject((Scope $rootScope) {
+        var child = $rootScope.$new();
+        $rootScope.a = 123;
+        expect(child.a).toEqual(123);
+      }));
+
+      it(r'should create a non prototypically inherited child scope', inject((Scope $rootScope) {
+        var child = $rootScope.$new(isolate: true);
+        $rootScope.a = 123;
+        expect(child.a).toEqual(null);
+        expect(child.$parent).toEqual($rootScope);
+        expect(child.$root).toBe($rootScope);
+      }));
+    });
+
+
+    describe(r'auto digest', () {
+      it(r'should auto digest at the end of the turn', inject((Scope $rootScope) {
+        var digestedValue = 0;
+        $rootScope.a = 1;
+        $rootScope.$watch('a', (newValue, oldValue, _this) {
+          digestedValue = newValue;
+        });
+        expect(digestedValue).toEqual(0);
+        zone.run(noop);
+        expect(digestedValue).toEqual(1);
+      }));
+
+      it(r'should skip auto digest if requested', inject((Scope $rootScope) {
+        var digestedValue = 0;
+        $rootScope.a = 1;
+        $rootScope.$watch('a', (newValue, oldValue, _this) {
+          digestedValue = newValue;
+        });
+        expect(digestedValue).toEqual(0);
+        zone.run(() {
+          $rootScope.$skipAutoDigest();
+        });
+        expect(digestedValue).toEqual(0);
+        zone.run(noop);
+        expect(digestedValue).toEqual(1);
+      }));
+
+      it(r'should throw exception if asked to skip auto digest outside of a turn',
+         inject((Scope $rootScope) {
+        var digestedValue = 0;
+        $rootScope.a = 1;
+        $rootScope.$watch('a', (newValue, oldValue, _this) {
+          digestedValue = newValue;
+        });
+        expect(digestedValue).toEqual(0);
+        expect($rootScope.$skipAutoDigest).toThrow();
+      }));
+    });
+
+
+    describe(r'$watch/$digest', () {
+      it(r'should watch and fire on simple property change', inject((Scope $rootScope) {
+        var log;
+
+        $rootScope.$watch('name', (a, b, c) {
+          log = [a, b, c];
+        });
+        $rootScope.$digest();
+        log = null;
+
+        expect(log).toEqual(null);
+        $rootScope.$digest();
+        expect(log).toEqual(null);
+        $rootScope.name = 'misko';
+        $rootScope.$digest();
+        expect(log).toEqual(['misko', null, $rootScope]);
+      }));
+
+
+      it(r'should watch and fire on expression change', inject((Scope $rootScope) {
+        var log;
+
+        $rootScope.$watch('name.first', (a, b, c) {
+          log = [a, b, c];
+        });
+        $rootScope.$digest();
+        log = null;
+
+        $rootScope.name = {};
+        expect(log).toEqual(null);
+        $rootScope.$digest();
+        expect(log).toEqual(null);
+        $rootScope.name['first'] = 'misko';
+        $rootScope.$digest();
+        expect(log).toEqual(['misko', null, $rootScope]);
+      }));
+
+
+      it(r'should delegate exceptions', () {
+        module((Module module) {
+          module.type(ExceptionHandler, implementedBy: LoggingExceptionHandler);
+        });
+        inject((Scope $rootScope, ExceptionHandler e) {
+          LoggingExceptionHandler $exceptionHandler = e;
+          $rootScope.$watch('a', () {throw 'abc';});
+          $rootScope.a = 1;
+          $rootScope.$digest();
+          expect($exceptionHandler.errors.length).toEqual(1);
+          expect($exceptionHandler.errors[0].error).toEqual('abc');
+        });
+      });
+
+
+      it(r'should fire watches in order of addition', inject((Scope $rootScope) {
+        // this is not an external guarantee, just our own sanity
+        var log = '';
+        $rootScope.$watch('a', (a, b, c) { log += 'a'; });
+        $rootScope.$watch('b', (a, b, c) { log += 'b'; });
+        $rootScope.$watch('c', (a, b, c) { log += 'c'; });
+        $rootScope.a = $rootScope.b = $rootScope.c = 1;
+        $rootScope.$digest();
+        expect(log).toEqual('abc');
+      }));
+
+
+      it(r'should call child $watchers in addition order', inject((Scope $rootScope) {
+        // this is not an external guarantee, just our own sanity
+        var log = '';
+        var childA = $rootScope.$new();
+        var childB = $rootScope.$new();
+        var childC = $rootScope.$new();
+        childA.$watch('a', (a, b, c) { log += 'a'; });
+        childB.$watch('b', (a, b, c) { log += 'b'; });
+        childC.$watch('c', (a, b, c) { log += 'c'; });
+        childA.a = childB.b = childC.c = 1;
+        $rootScope.$digest();
+        expect(log).toEqual('abc');
+      }));
+
+
+      it(r'should allow $digest on a child scope with and without a right sibling', inject(
+          (Scope $rootScope) {
+        // tests a traversal edge case which we originally missed
+        var log = [],
+            childA = $rootScope.$new(),
+            childB = $rootScope.$new();
+
+        $rootScope.$watch((a) { log.add('r'); });
+        childA.$watch((a) { log.add('a'); });
+        childB.$watch((a) { log.add('b'); });
+
+        // init
+        $rootScope.$digest();
+        expect(log.join('')).toEqual('rabra');
+
+        log.removeWhere((e) => true);
+        childA.$digest();
+        expect(log.join('')).toEqual('a');
+
+        log.removeWhere((e) => true);
+        childB.$digest();
+        expect(log.join('')).toEqual('b');
+      }));
+
+
+      it(r'should repeat watch cycle while model changes are identified', inject((Scope $rootScope) {
+        var log = '';
+        $rootScope.$watch('c', (v, b, c) {$rootScope.d = v; log+='c'; });
+        $rootScope.$watch('b', (v, b, c) {$rootScope.c = v; log+='b'; });
+        $rootScope.$watch('a', (v, b, c) {$rootScope.b = v; log+='a'; });
+        $rootScope.$digest();
+        log = '';
+        $rootScope.a = 1;
+        $rootScope.$digest();
+        expect($rootScope.b).toEqual(1);
+        expect($rootScope.c).toEqual(1);
+        expect($rootScope.d).toEqual(1);
+        expect(log).toEqual('abc');
+      }));
+
+
+      it(r'should repeat watch cycle from the root element', inject((Scope $rootScope) {
+        var log = '';
+        var child = $rootScope.$new();
+        $rootScope.$watch((a) { log += 'a'; });
+        child.$watch((a) { log += 'b'; });
+        $rootScope.$digest();
+        expect(log).toEqual('aba');
+      }));
+
+
+      it(r'should not fire upon $watch registration on initial $digest', inject((Scope $rootScope) {
+        var log = '';
+        $rootScope.a = 1;
+        $rootScope.$watch('a', (a, b, c) { log += 'a'; });
+        $rootScope.$watch('b', (a, b, c) { log += 'b'; });
+        $rootScope.$digest();
+        log = '';
+        $rootScope.$digest();
+        expect(log).toEqual('');
+      }));
+
+
+      it(r'should watch functions', () {
+        module((Module module) {
+          module.type(ExceptionHandler, implementedBy: LoggingExceptionHandler);
+        });
+        inject((Scope $rootScope, ExceptionHandler e) {
+          LoggingExceptionHandler exceptionHandler = e;
+          $rootScope.fn = () {return 'a';};
+          $rootScope.$watch('fn', (fn, a, b) {
+            exceptionHandler.errors.add(fn());
+          });
+          $rootScope.$digest();
+          expect(exceptionHandler.errors).toEqual(['a']);
+          $rootScope.fn = () {return 'b';};
+          $rootScope.$digest();
+          expect(exceptionHandler.errors).toEqual(['a', 'b']);
+        });
+      });
+
+
+      it(r'should prevent $digest recursion', inject((Scope $rootScope) {
+        var callCount = 0;
+        $rootScope.$watch('name', (a, b, c) {
+          expect(() {
+            $rootScope.$digest();
+          }).toThrow(r'$digest already in progress');
+          callCount++;
+        });
+        $rootScope.name = 'a';
+        $rootScope.$digest();
+        expect(callCount).toEqual(1);
+      }));
+
+
+      it(r'should return a function that allows listeners to be unregistered', inject(
+          (Scope $rootScope) {
+        var listener = jasmine.createSpy('watch listener'),
+            listenerRemove;
+
+        listenerRemove = $rootScope.$watch('foo', listener);
+        $rootScope.$digest(); //init
+        expect(listener).toHaveBeenCalled();
+        expect(listenerRemove).toBeDefined();
+
+        listener.reset();
+        $rootScope.foo = 'bar';
+        $rootScope.$digest(); //triger
+        expect(listener).toHaveBeenCalledOnce();
+
+        listener.reset();
+        $rootScope.foo = 'baz';
+        listenerRemove();
+        $rootScope.$digest(); //trigger
+        expect(listener).not.toHaveBeenCalled();
+      }));
+
+
+      it(r'should not infinitely digest when current value is NaN', inject((Scope $rootScope) {
+        $rootScope.$watch((a) { return double.NAN;});
+
+        expect(() {
+          $rootScope.$digest();
+        }).not.toThrow();
+      }));
+
+
+      it(r'should prevent infinite digest and should log firing expressions', inject((Scope $rootScope) {
+        $rootScope['a'] = 0;
+        $rootScope['b'] = 0;
+        $rootScope.$watch('a = a + 1');
+        $rootScope.$watch('b = b + 1');
+
+        expect(() {
+          $rootScope.$digest();
+        }).toThrow('Watchers fired in the last 3 iterations: ['
+              '["a = a + 1","b = b + 1"],'
+              '["a = a + 1","b = b + 1"],'
+              '["a = a + 1","b = b + 1"]'
+            ']');
+      }));
+
+
+      it(r'should always call the watchr with newVal and oldVal equal on the first run',
+          inject((Scope $rootScope) {
+        var log = [];
+        var logger = (scope, newVal, oldVal) {
+          var val = (newVal == oldVal || (newVal != oldVal && oldVal != newVal)) ? newVal : 'xxx';
+          log.add(val);
+        };
+
+        $rootScope.$watch((s) { return double.NAN;}, logger);
+        $rootScope.$watch((s) { return null;}, logger);
+        $rootScope.$watch((s) { return '';}, logger);
+        $rootScope.$watch((s) { return false;}, logger);
+        $rootScope.$watch((s) { return 23;}, logger);
+
+        $rootScope.$digest();
+        expect(log.removeAt(0).isNaN).toEqual(true); //jasmine's toBe and toEqual don't work well with NaNs
+        expect(log).toEqual([null, '', false, 23]);
+        log = [];
+        $rootScope.$digest();
+        expect(log).toEqual([]);
+      }));
+
+      describe('lazy digest', () {
+        var rootScope, lazyScope, eagerScope;
+
+        beforeEach(inject((Scope root) {
+          rootScope = root;
+          lazyScope = root.$new(lazy: true);
+          eagerScope = root.$new();
+        }));
+
+        it('should digest initially', () {
+          var log = '';
+          lazyScope.$watch(() {log += 'lazy;';});
+          eagerScope.$watch(() {log += 'eager;';});
+
+          rootScope.$digest();
+          expect(log).toEqual('lazy;eager;');
+
+          rootScope.$digest();
+          expect(log).toEqual('lazy;eager;eager;');
+
+          lazyScope.$dirty();
+          rootScope.$digest();
+          expect(log).toEqual('lazy;eager;eager;lazy;eager;');
+        });
+      });
+
+      describe('disabled digest', () {
+        var rootScope, childScope;
+
+        beforeEach(inject((Scope root) {
+          rootScope = root;
+          childScope = root.$new();
+        }));
+
+        it('should disable digest', () {
+          var log = '';
+          childScope.$watch(() {log += 'digest;';});
+
+          rootScope.$digest();
+          expect(log).toEqual('digest;');
+
+          childScope.$disabled = true;
+          expect(childScope.$disabled).toEqual(true);
+          rootScope.$digest();
+          expect(log).toEqual('digest;');
+
+          childScope.$disabled = false;
+          expect(childScope.$disabled).toEqual(false);
+          rootScope.$digest();
+          expect(log).toEqual('digest;digest;');
+        });
+      });
+    });
+
+
+    describe(r'$watchSet', () {
+      var scope;
+      beforeEach(inject((Scope s) => scope = s));
+
+      it('should skip empty sets', () {
+        expect(scope.$watchSet([], null)()).toBe(null);
+      });
+
+      it('should treat set of 1 as direct watch', () {
+        var lastValues = ['foo'];
+        var log = '';
+        var clean = scope.$watchSet(['a'], (values, oldValues, s) {
+          log += values.join(',') + ';';
+          expect(s).toBe(scope);
+          expect(oldValues).toEqual(lastValues);
+          lastValues = new List.from(values);
+        });
+
+        scope.a = 'foo';
+        scope.$digest();
+        expect(log).toEqual('foo;');
+
+        scope.$digest();
+        expect(log).toEqual('foo;');
+
+        scope.a = 'bar';
+        scope.$digest();
+        expect(log).toEqual('foo;bar;');
+
+        clean();
+        scope.a = 'xxx';
+        scope.$digest();
+        expect(log).toEqual('foo;bar;');
+      });
+
+      it('should detect a change to any one in a set', () {
+        var lastValues = ['foo', 'bar'];
+        var log = '';
+        var clean = scope.$watchSet(['a', 'b'], (values, oldValues, s) {
+          log += values.join(',') + ';';
+          expect(oldValues).toEqual(lastValues);
+          lastValues = new List.from(values);
+        });
+
+        scope.a = 'foo';
+        scope.b = 'bar';
+        scope.$digest();
+        expect(log).toEqual('foo,bar;');
+
+        scope.$digest();
+        expect(log).toEqual('foo,bar;');
+
+        scope.a = 'a';
+        scope.$digest();
+        expect(log).toEqual('foo,bar;a,bar;');
+
+        scope.a = 'A';
+        scope.b = 'B';
+        scope.$digest();
+        expect(log).toEqual('foo,bar;a,bar;A,B;');
+
+        clean();
+        scope.a = 'xxx';
+        scope.$digest();
+        expect(log).toEqual('foo,bar;a,bar;A,B;');
+      });
+    });
+
+
+    describe(r'$destroy', () {
+      var first = null, middle = null, last = null, log = null;
+
+      beforeEach(inject((Scope $rootScope) {
+        log = '';
+
+        first = $rootScope.$new();
+        middle = $rootScope.$new();
+        last = $rootScope.$new();
+
+        first.$watch((s) { log += '1';});
+        middle.$watch((s) { log += '2';});
+        last.$watch((s) { log += '3';});
+
+        $rootScope.$digest();
+        log = '';
+      }));
+
+
+      it(r'should ignore remove on root', inject((Scope $rootScope) {
+        $rootScope.$destroy();
+        $rootScope.$digest();
+        expect(log).toEqual('123');
+      }));
+
+
+      it(r'should remove first', inject((Scope $rootScope) {
+        first.$destroy();
+        $rootScope.$digest();
+        expect(log).toEqual('23');
+      }));
+
+
+      it(r'should remove middle', inject((Scope $rootScope) {
+        middle.$destroy();
+        $rootScope.$digest();
+        expect(log).toEqual('13');
+      }));
+
+
+      it(r'should remove last', inject((Scope $rootScope) {
+        last.$destroy();
+        $rootScope.$digest();
+        expect(log).toEqual('12');
+      }));
+
+
+      it(r'should broadcast the $destroy event', inject((Scope $rootScope) {
+        var log = [];
+        first.$on(r'$destroy', (s) => log.add('first'));
+        first.$new().$on(r'$destroy', (s) => log.add('first-child'));
+
+        first.$destroy();
+        expect(log).toEqual(['first', 'first-child']);
+      }));
+    });
+
+
+    describe(r'$eval', () {
+      it(r'should eval an expression', inject((Scope $rootScope) {
+        expect($rootScope.$eval('a=1')).toEqual(1);
+        expect($rootScope.a).toEqual(1);
+
+        $rootScope.$eval((self, locals) {self.b=2;});
+        expect($rootScope.b).toEqual(2);
+      }));
+
+
+      it(r'should allow passing locals to the expression', inject((Scope $rootScope) {
+        expect($rootScope.$eval('a+1', {"a": 2})).toBe(3);
+
+        $rootScope.$eval((scope) {
+          scope['c'] = scope['b'] + 4;
+        }, {"b": 3});
+        expect($rootScope.c).toBe(7);
+      }));
+    });
+
+
+    describe(r'$evalAsync', () {
+
+      it(r'should run callback before $watch', inject((Scope $rootScope) {
+        var log = '';
+        var child = $rootScope.$new();
+        $rootScope.$evalAsync((scope, _) { log += 'parent.async;'; });
+        $rootScope.$watch('value', (_, _0, _1) { log += 'parent.\$digest;'; });
+        child.$evalAsync((scope, _) { log += 'child.async;'; });
+        child.$watch('value', (_, _0, _1) { log += 'child.\$digest;'; });
+        $rootScope.$digest();
+        expect(log).toEqual('parent.async;child.async;parent.\$digest;child.\$digest;');
+      }));
+
+      it(r'should cause a $digest rerun', inject((Scope $rootScope) {
+        $rootScope.log = '';
+        $rootScope.value = 0;
+        // NOTE(deboer): watch listener string functions not yet supported
+        //$rootScope.$watch('value', 'log = log + ".";');
+        $rootScope.$watch('value', (__, _, scope) { scope.log = scope.log + "."; });
+        $rootScope.$watch('init', (_, __, _0) {
+          $rootScope.$evalAsync('value = 123; log = log + "=" ');
+          expect($rootScope.value).toEqual(0);
+        });
+        $rootScope.$digest();
+        expect($rootScope.log).toEqual('.=.');
+      }));
+
+      it(r'should run async in the same order as added', inject((Scope $rootScope) {
+        $rootScope.log = '';
+        $rootScope.$evalAsync("log = log + 1");
+        $rootScope.$evalAsync("log = log + 2");
+        $rootScope.$digest();
+        expect($rootScope.log).toEqual('12');
+      }));
+
+      it(r'should allow running after digest', inject((Scope $rootScope) {
+        $rootScope.log = '';
+        $rootScope.$evalAsync(() => $rootScope.log += 'eval;', outsideDigest: true);
+        $rootScope.$watch(() { $rootScope.log += 'digest;'; });
+        $rootScope.$digest();
+        expect($rootScope.log).toEqual('digest;eval;');
+      }));
+
+      it(r'should allow running after digest in issolate scope', inject((Scope $rootScope) {
+        var isolateScope = $rootScope.$new(isolate: true);
+        isolateScope.log = '';
+        isolateScope.$evalAsync(() => isolateScope.log += 'eval;', outsideDigest: true);
+        isolateScope.$watch(() { isolateScope.log += 'digest;'; });
+        isolateScope.$digest();
+        expect(isolateScope.log).toEqual('digest;eval;');
+      }));
+
+    });
+
+
+    describe(r'$apply', () {
+      it(r'should apply expression with full lifecycle', inject((Scope $rootScope) {
+        var log = '';
+        var child = $rootScope.$new();
+        $rootScope.$watch('a', (a, _, __) { log += '1'; });
+        child.$apply(r'$parent.a=0');
+        expect(log).toEqual('1');
+      }));
+
+
+      it(r'should catch exceptions', () {
+        module((Module module) => module.type(ExceptionHandler, implementedBy: LoggingExceptionHandler));
+        inject((Scope $rootScope, ExceptionHandler e) {
+          LoggingExceptionHandler $exceptionHandler = e;
+          var log = [];
+          var child = $rootScope.$new();
+          $rootScope.$watch('a', (a, _, __) => log.add('1'));
+          $rootScope.a = 0;
+          child.$apply((_, __) { throw 'MyError'; });
+          expect(log.join(',')).toEqual('1');
+          expect($exceptionHandler.errors[0].error).toEqual('MyError');
+          $exceptionHandler.errors.removeAt(0);
+          $exceptionHandler.assertEmpty();
+        });
+      });
+
+
+      describe(r'exceptions', () {
+        var log;
+        beforeEach(module((Module module) {
+          return module.type(ExceptionHandler, implementedBy: LoggingExceptionHandler);
+        }));
+        beforeEach(inject((Scope $rootScope) {
+          log = '';
+          $rootScope.$watch(() { log += '\$digest;'; });
+          $rootScope.$digest();
+          log = '';
+        }));
+
+
+        it(r'should execute and return value and update', inject(
+            (Scope $rootScope, ExceptionHandler e) {
+          LoggingExceptionHandler $exceptionHandler = e;
+          $rootScope.name = 'abc';
+          expect($rootScope.$apply((scope) => scope.name)).toEqual('abc');
+          expect(log).toEqual(r'$digest;');
+          $exceptionHandler.assertEmpty();
+        }));
+
+
+        it(r'should catch exception and update', inject((Scope $rootScope, ExceptionHandler e) {
+          LoggingExceptionHandler $exceptionHandler = e;
+          var error = 'MyError';
+          $rootScope.$apply(() { throw error; });
+          expect(log).toEqual(r'$digest;');
+          expect($exceptionHandler.errors[0].error).toEqual(error);
+        }));
+      });
+
+      it(r'should proprely reset phase on exception', inject((Scope $rootScope) {
+        var error = 'MyError';
+        expect(() =>$rootScope.$apply(() { throw error; })).toThrow(error);
+        expect(() =>$rootScope.$apply(() { throw error; })).toThrow(error);
+      }));
+    });
+
+
+    describe(r'events', () {
+
+      describe(r'$on', () {
+
+        it(r'should add listener for both $emit and $broadcast events', inject((Scope $rootScope) {
+          var log = '',
+              child = $rootScope.$new();
+
+          eventFn() {
+            log += 'X';
+          }
+
+          child.$on('abc', eventFn);
+          expect(log).toEqual('');
+
+          child.$emit(r'abc');
+          expect(log).toEqual('X');
+
+          child.$broadcast('abc');
+          expect(log).toEqual('XX');
+        }));
+
+
+        it(r'should return a function that deregisters the listener', inject((Scope $rootScope) {
+          var log = '',
+              child = $rootScope.$new(),
+              listenerRemove;
+
+          eventFn() {
+            log += 'X';
+          }
+
+          listenerRemove = child.$on('abc', eventFn);
+          expect(log).toEqual('');
+          expect(listenerRemove).toBeDefined();
+
+          child.$emit(r'abc');
+          child.$broadcast('abc');
+          expect(log).toEqual('XX');
+
+          log = '';
+          listenerRemove();
+          child.$emit(r'abc');
+          child.$broadcast('abc');
+          expect(log).toEqual('');
+        }));
+      });
+
+
+      describe(r'$emit', () {
+        var log, child, grandChild, greatGrandChild;
+
+        logger(event) {
+          log.add(event.currentScope.id);
+        }
+
+        beforeEach(module((Module module) {
+          return module.type(ExceptionHandler, implementedBy: LoggingExceptionHandler);
+        }));
+        beforeEach(inject((Scope $rootScope) {
+          log = [];
+          child = $rootScope.$new();
+          grandChild = child.$new();
+          greatGrandChild = grandChild.$new();
+
+          $rootScope.id = 0;
+          child.id = 1;
+          grandChild.id = 2;
+          greatGrandChild.id = 3;
+
+          $rootScope.$on('myEvent', logger);
+          child.$on('myEvent', logger);
+          grandChild.$on('myEvent', logger);
+          greatGrandChild.$on('myEvent', logger);
+        }));
+
+        it(r'should bubble event up to the root scope', () {
+          grandChild.$emit(r'myEvent');
+          expect(log.join('>')).toEqual('2>1>0');
+        });
+
+
+        it(r'should dispatch exceptions to the $exceptionHandler',
+            inject((ExceptionHandler e) {
+          LoggingExceptionHandler $exceptionHandler = e;
+          child.$on('myEvent', () { throw 'bubbleException'; });
+          grandChild.$emit(r'myEvent');
+          expect(log.join('>')).toEqual('2>1>0');
+          expect($exceptionHandler.errors[0].error).toEqual('bubbleException');
+        }));
+
+
+        it(r'should allow stopping event propagation', () {
+          child.$on('myEvent', (event) { event.stopPropagation(); });
+          grandChild.$emit(r'myEvent');
+          expect(log.join('>')).toEqual('2>1');
+        });
+
+
+        it(r'should forward method arguments', () {
+          child.$on('abc', (event, arg1, arg2) {
+            expect(event.name).toBe('abc');
+            expect(arg1).toBe('arg1');
+            expect(arg2).toBe('arg2');
+          });
+          child.$emit(r'abc', ['arg1', 'arg2']);
+        });
+
+
+        describe(r'event object', () {
+          it(r'should have methods/properties', () {
+            var event;
+            child.$on('myEvent', (e) {
+              expect(e.targetScope).toBe(grandChild);
+              expect(e.currentScope).toBe(child);
+              expect(e.name).toBe('myEvent');
+              event = e;
+            });
+            grandChild.$emit(r'myEvent');
+            expect(event).toBeDefined();
+          });
+
+
+          it(r'should have preventDefault method and defaultPrevented property', () {
+            var event = grandChild.$emit(r'myEvent');
+            expect(event.defaultPrevented).toBe(false);
+
+            child.$on('myEvent', (event) {
+              event.preventDefault();
+            });
+            event = grandChild.$emit(r'myEvent');
+            expect(event.defaultPrevented).toBe(true);
+          });
+        });
+      });
+
+
+      describe(r'$broadcast', () {
+        describe(r'event propagation', () {
+          var log, child1, child2, child3, grandChild11, grandChild21, grandChild22, grandChild23,
+              greatGrandChild211;
+
+          logger(event) {
+            log.add(event.currentScope.id);
+          }
+
+          beforeEach(inject((Scope $rootScope) {
+            log = [];
+            child1 = $rootScope.$new();
+            child2 = $rootScope.$new();
+            child3 = $rootScope.$new();
+            grandChild11 = child1.$new();
+            grandChild21 = child2.$new();
+            grandChild22 = child2.$new();
+            grandChild23 = child2.$new();
+            greatGrandChild211 = grandChild21.$new();
+
+            $rootScope.id = 0;
+            child1.id = 1;
+            child2.id = 2;
+            child3.id = 3;
+            grandChild11.id = 11;
+            grandChild21.id = 21;
+            grandChild22.id = 22;
+            grandChild23.id = 23;
+            greatGrandChild211.id = 211;
+
+            $rootScope.$on('myEvent', logger);
+            child1.$on('myEvent', logger);
+            child2.$on('myEvent', logger);
+            child3.$on('myEvent', logger);
+            grandChild11.$on('myEvent', logger);
+            grandChild21.$on('myEvent', logger);
+            grandChild22.$on('myEvent', logger);
+            grandChild23.$on('myEvent', logger);
+            greatGrandChild211.$on('myEvent', logger);
+
+            //          R
+            //       /  |   \
+            //     1    2    3
+            //    /   / | \
+            //   11  21 22 23
+            //       |
+            //      211
+          }));
+
+
+          it(r'should broadcast an event from the root scope', inject((Scope $rootScope) {
+            $rootScope.$broadcast('myEvent');
+            expect(log.join('>')).toEqual('0>1>11>2>21>211>22>23>3');
+          }));
+
+
+          it(r'should broadcast an event from a child scope', () {
+            child2.$broadcast('myEvent');
+            expect(log.join('>')).toEqual('2>21>211>22>23');
+          });
+
+
+          it(r'should broadcast an event from a leaf scope with a sibling', () {
+            grandChild22.$broadcast('myEvent');
+            expect(log.join('>')).toEqual('22');
+          });
+
+
+          it(r'should broadcast an event from a leaf scope without a sibling', () {
+            grandChild23.$broadcast('myEvent');
+            expect(log.join('>')).toEqual('23');
+          });
+
+
+          it(r'should not not fire any listeners for other events', inject((Scope $rootScope) {
+            $rootScope.$broadcast('fooEvent');
+            expect(log.join('>')).toEqual('');
+          }));
+
+
+          it(r'should return event object', () {
+            var result = child1.$broadcast('some');
+
+            expect(result).toBeDefined();
+            expect(result.name).toBe('some');
+            expect(result.targetScope).toBe(child1);
+          });
+        });
+
+
+        describe(r'listener', () {
+          it(r'should receive event object', inject((Scope $rootScope) {
+            var scope = $rootScope,
+                child = scope.$new(),
+                event;
+
+            child.$on('fooEvent', (e) {
+              event = e;
+            });
+            scope.$broadcast('fooEvent');
+
+            expect(event.name).toBe('fooEvent');
+            expect(event.targetScope).toBe(scope);
+            expect(event.currentScope).toBe(child);
+          }));
+
+
+          it(r'should support passing messages as varargs', inject((Scope $rootScope) {
+            var scope = $rootScope,
+                child = scope.$new(),
+                args;
+
+            child.$on('fooEvent', (a, b, c, d, e) {
+              args = [a, b, c, d, e];
+            });
+            scope.$broadcast('fooEvent', ['do', 're', 'me', 'fa']);
+
+            expect(args.length).toBe(5);
+            expect(args.sublist(1)).toEqual(['do', 're', 'me', 'fa']);
+          }));
+        });
+      });
+    });
+
+
+    describe('\$watchCollection', () {
+      var log, $rootScope, deregister;
+
+      beforeEach(inject((Scope _$rootScope_) {
+        log = [];
+        $rootScope = _$rootScope_;
+        deregister = $rootScope.$watchCollection('obj', (obj) {
+          log.add(JSON.encode(obj));
+        });
+      }));
+
+
+      it('should not trigger if nothing change', inject((Scope $rootScope) {
+        $rootScope.$digest();
+        expect(log).toEqual(['null']);
+
+        $rootScope.$digest();
+        expect(log).toEqual(['null']);
+      }));
+
+
+      it('should allow deregistration', inject((Scope $rootScope) {
+        $rootScope.obj = [];
+        $rootScope.$digest();
+
+        expect(log).toEqual(['[]']);
+
+        $rootScope.obj.add('a');
+        deregister();
+
+        $rootScope.$digest();
+        expect(log).toEqual(['[]']);
+      }));
+
+
+      describe('array', () {
+        it('should trigger when property changes into array', () {
+          $rootScope.obj = 'test';
+          $rootScope.$digest();
+          expect(log).toEqual(['"test"']);
+
+          $rootScope.obj = [];
+          $rootScope.$digest();
+          expect(log).toEqual(['"test"', '[]']);
+        });
+
+
+        it('should not trigger change when object in collection changes', () {
+          $rootScope.obj = [{}];
+          $rootScope.$digest();
+          expect(log).toEqual(['[{}]']);
+
+          $rootScope.obj[0]['name'] = 'foo';
+          $rootScope.$digest();
+          expect(log).toEqual(['[{}]']);
+        });
+
+
+        it('should watch array properties', () {
+          $rootScope.obj = [];
+          $rootScope.$digest();
+          expect(log).toEqual(['[]']);
+
+          $rootScope.obj.add('a');
+          $rootScope.$digest();
+          expect(log).toEqual(['[]', '["a"]']);
+
+          $rootScope.obj[0] = 'b';
+          $rootScope.$digest();
+          expect(log).toEqual(['[]', '["a"]', '["b"]']);
+
+          $rootScope.obj.add([]);
+          $rootScope.obj.add({});
+          log = [];
+          $rootScope.$digest();
+          expect(log).toEqual(['["b",[],{}]']);
+
+          var temp = $rootScope.obj[1];
+          $rootScope.obj[1] = $rootScope.obj[2];
+          $rootScope.obj[2] = temp;
+          $rootScope.$digest();
+          expect(log).toEqual([ '["b",[],{}]', '["b",{},[]]' ]);
+
+          $rootScope.obj.removeAt(0);
+          log = [];
+          $rootScope.$digest();
+          expect(log).toEqual([ '[{},[]]' ]);
+        });
+      });
+
+
+      it('should watch iterable properties', () {
+        $rootScope.obj = _toJsonableIterable([]);
+        $rootScope.$digest();
+        expect(log).toEqual(['[]']);
+
+        $rootScope.obj = _toJsonableIterable(['a']);
+        $rootScope.$digest();
+        expect(log).toEqual(['[]', '["a"]']);
+
+        $rootScope.obj = _toJsonableIterable(['b']);
+        $rootScope.$digest();
+        expect(log).toEqual(['[]', '["a"]', '["b"]']);
+
+        $rootScope.obj = _toJsonableIterable(['b', [], {}]);
+        log = [];
+        $rootScope.$digest();
+        expect(log).toEqual(['["b",[],{}]']);
+      });
+
+
+      describe('objects', () {
+        it('should trigger when property changes into object', () {
+          $rootScope.obj = 'test';
+          $rootScope.$digest();
+          expect(log).toEqual(['"test"']);
+
+          $rootScope.obj = {};
+          $rootScope.$digest();
+          expect(log).toEqual(['"test"', '{}']);
+        });
+
+
+        it('should not trigger change when object in collection changes', () {
+          $rootScope.obj = {'name': {}};
+          $rootScope.$digest();
+          expect(log).toEqual(['{"name":{}}']);
+
+          $rootScope.obj['name']['bar'] = 'foo';
+          $rootScope.$digest();
+          expect(log).toEqual(['{"name":{}}']);
+        });
+
+
+        it('should watch object properties', () {
+          $rootScope.obj = {};
+          $rootScope.$digest();
+          expect(log).toEqual(['{}']);
+
+          $rootScope.obj['a']= 'A';
+          $rootScope.$digest();
+          expect(log).toEqual(['{}', '{"a":"A"}']);
+
+          $rootScope.obj['a'] = 'B';
+          $rootScope.$digest();
+          expect(log).toEqual(['{}', '{"a":"A"}', '{"a":"B"}']);
+
+          $rootScope.obj['b'] = [];
+          $rootScope.obj['c'] = {};
+          log = [];
+          $rootScope.$digest();
+          expect(log).toEqual(['{"a":"B","b":[],"c":{}}']);
+
+          var temp = $rootScope.obj['a'];
+          $rootScope.obj['a'] = $rootScope.obj['b'];
+          $rootScope.obj['c'] = temp;
+          $rootScope.$digest();
+          expect(log).toEqual([ '{"a":"B","b":[],"c":{}}', '{"a":[],"b":[],"c":"B"}' ]);
+
+          $rootScope.obj.remove('a');
+          log = [];
+          $rootScope.$digest();
+          expect(log).toEqual([ '{"b":[],"c":"B"}' ]);
+        });
+      });
+    });
+
+
+    describe('perf', () {
+      describe('counters', () {
+
+        it('should expose scope count', inject((Profiler perf, Scope scope) {
+          scope.$digest();
+          expect(perf.counters['ng.scopes']).toEqual(1);
+
+          scope.$new();
+          scope.$new();
+          var lastChild = scope.$new();
+          scope.$digest();
+          expect(perf.counters['ng.scopes']).toEqual(4);
+
+          // Create a child scope and make sure it's counted as well.
+          lastChild.$new();
+          scope.$digest();
+          expect(perf.counters['ng.scopes']).toEqual(5);
+        }));
+
+
+        it('should update scope count when scope destroyed',
+            inject((Profiler perf, Scope scope) {
+
+          var child = scope.$new();
+          scope.$digest();
+          expect(perf.counters['ng.scopes']).toEqual(2);
+
+          child.$destroy();
+          scope.$digest();
+          expect(perf.counters['ng.scopes']).toEqual(1);
+        }));
+
+
+        it('should expose watcher count', inject((Profiler perf, Scope scope) {
+          scope.$digest();
+          expect(perf.counters['ng.scope.watchers']).toEqual(0);
+
+          scope.$watch(() => 0, (_) {});
+          scope.$watch(() => 0, (_) {});
+          scope.$watch(() => 0, (_) {});
+          scope.$digest();
+          expect(perf.counters['ng.scope.watchers']).toEqual(3);
+
+          // Create a child scope and make sure it's counted as well.
+          scope.$new().$watch(() => 0, (_) {});
+          scope.$digest();
+          expect(perf.counters['ng.scope.watchers']).toEqual(4);
+        }));
+
+
+        it('should update watcher count when watcher removed',
+            inject((Profiler perf, Scope scope) {
+
+          var unwatch = scope.$new().$watch(() => 0, (_) {});
+          scope.$digest();
+          expect(perf.counters['ng.scope.watchers']).toEqual(1);
+
+          unwatch();
+          scope.$digest();
+          expect(perf.counters['ng.scope.watchers']).toEqual(0);
+        }));
+      });
+    });
+
+
+    describe('optimizations', () {
+      var scope;
+      var log;
+      beforeEach(inject((Scope _scope, Logger _log) {
+        scope = _scope;
+        log = _log;
+        scope['a'] = 1;
+        scope['b'] = 2;
+        scope['c'] = 3;
+        scope.$watch(() {log('a'); return scope['a'];}, (value) => log('fire:a'));
+        scope.$watch(() {log('b'); return scope['b'];}, (value) => log('fire:b'));
+        scope.$watch(() {log('c'); return scope['c'];}, (value) {log('fire:c'); scope['b']++; });
+        scope.$digest();
+        log.clear();
+      }));
+
+      it('should loop once on no dirty', () {
+        scope.$digest();
+        expect(log.result()).toEqual('a; b; c');
+      });
+
+      it('should exit early on second loop', () {
+        scope['b']++;
+        scope.$digest();
+        expect(log.result()).toEqual('a; b; fire:b; c; a');
+      });
+
+      it('should continue checking if second loop dirty', () {
+        scope['c']++;
+        scope.$digest();
+        expect(log.result()).toEqual('a; b; c; fire:c; a; b; fire:b; c; a');
+      });
+    });
+
+    describe('ScopeLocals', () {
+      var scope;
+
+      beforeEach(inject((Scope _scope) => scope = _scope));
+
+      it('should read from locals', () {
+        scope['a'] = 'XXX';
+        scope['c'] = 'C';
+        var scopeLocal = new ScopeLocals(scope, {'a': 'A', 'b': 'B'});
+        expect(scopeLocal['a']).toEqual('A');
+        expect(scopeLocal['b']).toEqual('B');
+        expect(scopeLocal['c']).toEqual('C');
+      });
+
+      it('should write to Scope', () {
+        scope['a'] = 'XXX';
+        scope['c'] = 'C';
+        var scopeLocal = new ScopeLocals(scope, {'a': 'A', 'b': 'B'});
+
+        scopeLocal['a'] = 'aW';
+        scopeLocal['b'] = 'bW';
+        scopeLocal['c'] = 'cW';
+
+        expect(scope['a']).toEqual('aW');
+        expect(scope['b']).toEqual('bW');
+        expect(scope['c']).toEqual('cW');
+
+        expect(scopeLocal['a']).toEqual('A');
+        expect(scopeLocal['b']).toEqual('B');
+        expect(scopeLocal['c']).toEqual('cW');
+      });
+    });
+  });
+}
+
+_toJsonableIterable(Iterable source) => new _JsonableIterableWrapper(source);
+
+class _JsonableIterableWrapper<T> implements Iterable<T> {
+  final Iterable<T> source;
+
+  _JsonableIterableWrapper(this.source);
+
+  bool any(bool test(T element)) => source.any(test);
+
+  bool contains(Object element) => source.contains(element);
+
+  T elementAt(int index) => source.elementAt(index);
+
+  bool every(bool test(T element)) => source.every(test);
+
+  Iterable expand(Iterable f(T element)) => source.expand(f);
+
+  T get first => source.first;
+
+  T firstWhere(bool test(T element), {T orElse()}) =>
+      source.firstWhere(test, orElse: orElse);
+
+  fold(initialValue, combine(previousValue, T element)) =>
+      source.fold(initialValue, combine);
+
+  void forEach(void f(T element)) => source.forEach(f);
+
+  bool get isEmpty => source.isEmpty;
+
+  bool get isNotEmpty => source.isNotEmpty;
+
+  Iterator<T> get iterator => source.iterator;
+
+  String join([String separator = ""]) => source.join(separator);
+
+  T get last => source.last;
+
+  T lastWhere(bool test(T element), {T orElse()}) =>
+      source.lastWhere(test, orElse: orElse);
+
+  int get length => source.length;
+
+  Iterable map(f(T element)) => source.map(f);
+
+  T reduce(T combine(T value, T element)) => source.reduce(combine);
+
+  T get single => source.single;
+
+  T singleWhere(bool test(T element)) => source.singleWhere(test);
+
+  Iterable<T> skip(int n) => source.skip(n);
+
+  Iterable<T> skipWhile(bool test(T value)) => source.skipWhile(test);
+
+  Iterable<T> take(int n) => source.take(n);
+
+  Iterable<T> takeWhile(bool test(T value)) => source.takeWhile(test);
+
+  List<T> toList({bool growable: true}) => source.toList(growable: growable);
+
+  Set<T> toSet() => source.toSet();
+
+  Iterable<T> where(bool test(T element)) => source.where(test);
+
+  toJson() => source.toList();
+}