Adding Angular and dependent packages for testing

third_party/pkg/angular/test/directive/ng_repeat_spec.dart

+library ng_repeat_spec;
+
+import '../_specs.dart';
+
+main() {
+  describe('NgRepeater', () {
+    var element, $compile, scope, $exceptionHandler;
+
+    beforeEach(inject((Injector injector, Scope $rootScope, Compiler compiler) {
+      $exceptionHandler = injector.get(ExceptionHandler);
+      scope = $rootScope;
+      $compile = (html) {
+        element = $(html);
+        var blockFactory = compiler(element);
+        var block = blockFactory(injector, element);
+        return element;
+      };
+    }));
+
+    it(r'should set create a list of items', inject((Scope scope, Compiler compiler, Injector injector) {
+      var element = $('<div><div ng-repeat="item in items">{{item}}</div></div>');
+      BlockFactory blockFactory = compiler(element);
+      Block block = blockFactory(injector, element);
+      scope.items = ['a', 'b'];
+      scope.$apply();
+      expect(element.text()).toEqual('ab');
+    }));
+
+
+    it(r'should set create a list of items from iterable',
+        inject((Scope scope, Compiler compiler, Injector injector) {
+      var element = $('<div><div ng-repeat="item in items">{{item}}</div></div>');
+      BlockFactory blockFactory = compiler(element);
+      Block block = blockFactory(injector, element);
+      scope.items = ['a', 'b'].map((i) => i); // makes an iterable
+      scope.$apply();
+      expect(element.text()).toEqual('ab');
+    }));
+
+
+    it(r'should iterate over an array of objects', () {
+      element = $compile(
+        '<ul>' +
+          '<li ng-repeat="item in items">{{item.name}};</li>' +
+        '</ul>');
+
+      // INIT
+      scope.items = [{"name": 'misko'}, {"name":'shyam'}];
+      scope.$digest();
+      expect(element.find('li').length).toEqual(2);
+      expect(element.text()).toEqual('misko;shyam;');
+
+      // GROW
+      scope.items.add({"name": 'adam'});
+      scope.$digest();
+      expect(element.find('li').length).toEqual(3);
+      expect(element.text()).toEqual('misko;shyam;adam;');
+
+      // SHRINK
+      scope.items.removeLast();
+      scope.items.removeAt(0);
+      scope.$digest();
+      expect(element.find('li').length).toEqual(1);
+      expect(element.text()).toEqual('shyam;');
+    });
+
+
+    it(r'should gracefully handle nulls', () {
+      element = $compile(
+        '<div>' +
+          '<ul>' +
+            '<li ng-repeat="item in null">{{item.name}};</li>' +
+          '</ul>' +
+        '</div>');
+      scope.$digest();
+      expect(element.find('ul').length).toEqual(1);
+      expect(element.find('li').length).toEqual(0);
+    });
+
+
+    describe('track by', () {
+      it(r'should track using expression function', () {
+        element = $compile(
+            '<ul>' +
+                '<li ng-repeat="item in items track by item.id">{{item.name}};</li>' +
+            '</ul>');
+        scope.items = [{"id": 'misko'}, {"id": 'igor'}];
+        scope.$digest();
+        var li0 = element.find('li')[0];
+        var li1 = element.find('li')[1];
+
+        scope.items.add(scope.items.removeAt(0));
+        scope.$digest();
+        expect(element.find('li')[0]).toBe(li1);
+        expect(element.find('li')[1]).toBe(li0);
+      });
+
+
+      it(r'should track using build in $id function', () {
+        element = $compile(
+            '<ul>' +
+                r'<li ng-repeat="item in items track by $id(item)">{{item.name}};</li>' +
+            '</ul>');
+        scope.items = [{"name": 'misko'}, {"name": 'igor'}];
+        scope.$digest();
+        var li0 = element.find('li')[0];
+        var li1 = element.find('li')[1];
+
+        scope.items.add(scope.items.removeAt(0));
+        scope.$digest();
+        expect(element.find('li')[0]).toBe(li1);
+        expect(element.find('li')[1]).toBe(li0);
+      });
+
+
+      xit(r'should iterate over an array of primitives', () {
+        element = $compile(
+            r'<ul>' +
+                r'<li ng-repeat="item in items track by $index">{{item}};</li>' +
+            r'</ul>');
+
+        // INIT
+        scope.items = [true, true, true];
+        scope.$digest();
+        expect(element.find('li').length).toEqual(3);
+        expect(element.text()).toEqual('true;true;true;');
+        
+        scope.items = [false, true, true];
+        scope.$digest();
+        expect(element.find('li').length).toEqual(3);
+        expect(element.text()).toEqual('false;true;true;');
+
+        scope.items = [false, true, false];
+        scope.$digest();
+        expect(element.find('li').length).toEqual(3);
+        expect(element.text()).toEqual('false;true;false;');
+
+        scope.items = [true];
+        scope.$digest();
+        expect(element.find('li').length).toEqual(1);
+        expect(element.text()).toEqual('true;');
+
+        scope.items = [true, true, false];
+        scope.$digest();
+        expect(element.find('li').length).toEqual(3);
+        expect(element.text()).toEqual('true;true;false;');
+
+        scope.items = [true, false, false];
+        scope.$digest();
+        expect(element.find('li').length).toEqual(3);
+        expect(element.text()).toEqual('true;false;false;');
+
+        // string
+        scope.items = ['a', 'a', 'a'];
+        scope.$digest();
+        expect(element.find('li').length).toEqual(3);
+        expect(element.text()).toEqual('a;a;a;');
+
+        scope.items = ['ab', 'a', 'a'];
+        scope.$digest();
+        expect(element.find('li').length).toEqual(3);
+        expect(element.text()).toEqual('ab;a;a;');
+
+        scope.items = ['test'];
+        scope.$digest();
+        expect(element.find('li').length).toEqual(1);
+        expect(element.text()).toEqual('test;');
+
+        scope.items = ['same', 'value'];
+        scope.$digest();
+        expect(element.find('li').length).toEqual(2);
+        expect(element.text()).toEqual('same;value;');
+
+        // number
+        scope.items = [12, 12, 12];
+        scope.$digest();
+        expect(element.find('li').length).toEqual(3);
+        expect(element.text()).toEqual('12;12;12;');
+
+        scope.items = [53, 12, 27];
+        scope.$digest();
+        expect(element.find('li').length).toEqual(3);
+        expect(element.text()).toEqual('53;12;27;');
+
+        scope.items = [89];
+        scope.$digest();
+        expect(element.find('li').length).toEqual(1);
+        expect(element.text()).toEqual('89;');
+
+        scope.items = [89, 23];
+        scope.$digest();
+        expect(element.find('li').length).toEqual(2);
+        expect(element.text()).toEqual('89;23;');
+      });
+
+    });
+
+
+    it(r'should error on wrong parsing of ngRepeat', () {
+      element = $('<ul><li ng-repeat="i dont parse"></li></ul>');
+      expect(() {
+        $compile(element);
+      }).toThrow("[NgErr7] ngRepeat error! Expected expression in form of '_item_ in _collection_[ track by _id_]' but got 'i dont parse'.");
+    });
+
+
+    it("should throw error when left-hand-side of ngRepeat can't be parsed", () {
+        element = $('<ul><li ng-repeat="i dont parse in foo"></li></ul>');
+        expect(() {
+          $compile(element);
+        }).toThrow("[NgErr8] ngRepeat error! '_item_' in '_item_ in _collection_' should be an identifier or '(_key_, _value_)' expression, but got 'i dont parse'.");
+    });
+
+
+    it(r'should expose iterator offset as $index when iterating over arrays',
+        () {
+      element = $compile(
+        '<ul>' +
+          '<li ng-repeat="item in items">{{item}}:{{\$index}}|</li>' +
+        '</ul>');
+      scope.items = ['misko', 'shyam', 'frodo'];
+      scope.$digest();
+      expect(element.text()).toEqual('misko:0|shyam:1|frodo:2|');
+    });
+
+
+    it(r'should expose iterator position as $first, $middle and $last when iterating over arrays',
+        () {
+      element = $compile(
+        '<ul>' +
+          '<li ng-repeat="item in items">{{item}}:{{\$first}}-{{\$middle}}-{{\$last}}|</li>' +
+        '</ul>');
+      scope.items = ['misko', 'shyam', 'doug'];
+      scope.$digest();
+      expect(element.text()).
+          toEqual('misko:true-false-false|shyam:false-true-false|doug:false-false-true|');
+
+      scope.items.add('frodo');
+      scope.$digest();
+      expect(element.text()).
+          toEqual('misko:true-false-false|' +
+                  'shyam:false-true-false|' +
+                  'doug:false-true-false|' +
+                  'frodo:false-false-true|');
+
+      scope.items.removeLast();
+      scope.items.removeLast();
+      scope.$digest();
+      expect(element.text()).toEqual('misko:true-false-false|shyam:false-false-true|');
+
+      scope.items.removeLast();
+      scope.$digest();
+      expect(element.text()).toEqual('misko:true-false-true|');
+    });
+
+    it(r'should report odd', () {
+      element = $compile(
+        '<ul>' +
+          '<li ng-repeat="item in items">{{item}}:{{\$odd}}-{{\$even}}|</li>' +
+        '</ul>');
+      scope.items = ['misko', 'shyam', 'doug'];
+      scope.$digest();
+      expect(element.text()).toEqual('misko:false-true|shyam:true-false|doug:false-true|');
+
+      scope.items.add('frodo');
+      scope.$digest();
+      expect(element.text()).toEqual('misko:false-true|shyam:true-false|doug:false-true|frodo:true-false|');
+
+      scope.items.removeLast();
+      scope.items.removeLast();
+      scope.$digest();
+      expect(element.text()).toEqual('misko:false-true|shyam:true-false|');
+
+      scope.items.removeLast();
+      scope.$digest();
+      expect(element.text()).toEqual('misko:false-true|');
+    });
+
+    it(r'should repeat over nested arrays', () {
+      element = $compile(
+        '<ul>' +
+          '<li ng-repeat="subgroup in groups">' +
+            '<div ng-repeat="group in subgroup">{{group}}|</div>X' +
+          '</li>' +
+        '</ul>');
+      scope.groups = [['a', 'b'], ['c','d']];
+      scope.$digest();
+
+      expect(element.text()).toEqual('a|b|Xc|d|X');
+    });
+
+
+    describe('stability', () {
+      var a, b, c, d, lis;
+
+      beforeEach(() {
+        element = $compile(
+          '<ul>' +
+            '<li ng-repeat="item in items">{{key}}:{{val}}|></li>' +
+          '</ul>');
+        a = {};
+        b = {};
+        c = {};
+        d = {};
+
+        scope.items = [a, b, c];
+        scope.$digest();
+        lis = element.find('li');
+      });
+
+
+      it(r'should preserve the order of elements', () {
+        scope.items = [a, c, d];
+        scope.$digest();
+        var newElements = element.find('li');
+        expect(newElements[0]).toEqual(lis[0]);
+        expect(newElements[1]).toEqual(lis[2]);
+        expect(newElements[2] == lis[1]).toEqual(false);
+      });
+
+
+      it(r'should throw error on adding existing duplicates and recover', () {
+        scope.items = [a, a, a];
+        expect(() {
+          scope.$digest();
+        }).toThrow("[NgErr50] ngRepeat error! Duplicates in a repeater are not allowed. Use 'track by' expression to specify unique keys. Repeater: item in items, Duplicate key: {}");
+
+        // recover
+        scope.items = [a];
+        scope.$digest();
+        var newElements = element.find('li');
+        expect(newElements.length).toEqual(1);
+        expect(newElements[0]).toEqual(lis[0]);
+
+        scope.items = [];
+        scope.$digest();
+        newElements = element.find('li');
+        expect(newElements.length).toEqual(0);
+      });
+
+
+      it(r'should throw error on new duplicates and recover', () {
+        scope.items = [d, d, d];
+        expect(() {
+          scope.$digest();
+        }).toThrow("[NgErr50] ngRepeat error! Duplicates in a repeater are not allowed. Use 'track by' expression to specify unique keys. Repeater: item in items, Duplicate key: {}");
+
+        // recover
+        scope.items = [a];
+        scope.$digest();
+        var newElements = element.find('li');
+        expect(newElements.length).toEqual(1);
+        expect(newElements[0]).toEqual(lis[0]);
+
+        scope.items = [];
+        scope.$digest();
+        newElements = element.find('li');
+        expect(newElements.length).toEqual(0);
+      });
+
+
+      it(r'should reverse items when the collection is reversed', () {
+        scope.items = [a, b, c];
+        scope.$digest();
+        lis = element.find('li');
+
+        scope.items = [c, b, a];
+        scope.$digest();
+        var newElements = element.find('li');
+        expect(newElements.length).toEqual(3);
+        expect(newElements[0]).toEqual(lis[2]);
+        expect(newElements[1]).toEqual(lis[1]);
+        expect(newElements[2]).toEqual(lis[0]);
+      });
+
+
+      it(r'should reuse elements even when model is composed of primitives', () {
+        // rebuilding repeater from scratch can be expensive, we should try to avoid it even for
+        // model that is composed of primitives.
+
+        scope.items = ['hello', 'cau', 'ahoj'];
+        scope.$digest();
+        lis = element.find('li');
+        lis[2].id = 'yes';
+
+        scope.items = ['ahoj', 'hello', 'cau'];
+        scope.$digest();
+        var newLis = element.find('li');
+        expect(newLis.length).toEqual(3);
+        expect(newLis[0]).toEqual(lis[2]);
+        expect(newLis[1]).toEqual(lis[0]);
+        expect(newLis[2]).toEqual(lis[1]);
+      });
+    });
+
+    describe('shalow', () {
+      TestBed _;
+      beforeEach(inject((TestBed tb) => _ = tb));
+
+      it('should x', () {
+        _.compile('<ul><li ng-shallow-repeat="i in items">{{i.name}}</li></ul>');
+        _.rootScope.items = [{'name': 'a'}, {'name':'b'}];
+        _.rootScope.$digest();
+        expect(_.rootElement.text).toEqual('ab');
+
+        // Should not see this.
+        _.rootScope.items[0]['name'] = 'x';
+        _.rootScope.$digest();
+        expect(_.rootElement.text).toEqual('ab');
+
+        // We see additions but not changse
+        _.rootScope.items.add({'name': 'C'});
+        _.rootScope.$digest();
+        expect(_.rootElement.text).toEqual('abC');
+
+
+        // Cloning list does a full update
+        _.rootScope.items = new List.from(_.rootScope.items);
+        _.rootScope.$digest();
+        expect(_.rootElement.text).toEqual('xbC');
+      });
+    });
+  });
+}