AngularJS Essentials

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Chapter 7 Directives The last kind of component that we are going to test is the directive. Let's start with one of the directives we created in Chapter 2, Creating Reusable Components with Directives, and converted it into a separated module in Chapter 6, Modules: uiApp.js var ui = angular.module("ui", []); alertDirective.js ui.directive("alert", function () { return { restrict: "E", scope: { topic: "@" }, replace: true, transclude: true, template: "" + "" + "{{topic}}" + "" + "" + "" + "" }; }); The directive is by far the most complex component to be tested. Part of the complexity comes from the framework's life cycle, which we should understand before creating any directive specification. In the following section, you will understand this, step by step. [ 129 ] www.it-ebooks.info
Unit Testing Creating the element with the directive The framework's compiler walks through the DOM, looking for elements that match the directives. In the following code is our directive before being compiled: Please inform the plate and the color of the car Compiling the directive After this, the element is compiled by the $compile service, returning the link function of the directive. At this moment, the template is already generated, however, we still need to call the link function, passing the $scope object in order to bind the template to the $scope service: {{topic}} Calling the link function with the scope Now, after the link function is executed, we are almost done! The {{topic}} expression could be retrieved from the $scope object; however, as we saw in Chapter 5, Scope, we need to invoke the digest cycle in order to notify the expression: {{topic}} Please inform the plate and the color of the car Invoking the digest cycle Finally, we have to call the $digest function to update the view: Something went wrong! [ 130 ] www.it-ebooks.info
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AngularJS Essentials Copyright © 2
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About the Author Rodrigo Branas is
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About the Reviewers Andrei M. Eichl
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Table of Contents The ngIf directiv
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Table of Contents Chapter 7: Unit T
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Preface Only 2 months later, I laun
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Preface A block of code is set as f
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Preface Piracy Piracy of copyright
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Getting Started with AngularJS This
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Getting Started with AngularJS The
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Getting Started with AngularJS
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Getting Started with AngularJS app.
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Creating Reusable Components with D
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Data Handling The following code is
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Data Handling Now, the output will
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Data Handling The expected result i
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Data Handling Color Entrance
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Data Handling Now, let's introduce
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Data Handling To finish, we can add
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Data Handling The plate must start
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Dependency Injection and Services D
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Dependency Injection and Services $
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Dependency Injection and Services I
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Page 117 and 118: Scope What happens when we change t
Page 119 and 120: Scope if (newValue == oldValue) ret
Page 121 and 122: Scope ng-model="username" placehold
Page 123 and 124: Scope Consider the following code s
Page 125 and 126: Scope Now, we need to start tickGen
Page 129 and 130: Modules The UI module The UI module
Page 131 and 132: Modules }, template: "" + "{{title}
Page 133 and 134: Modules A major part
Page 135 and 136: Unit Testing The topics that we'll
Page 137 and 138: Unit Testing car.entrance = new Dat
Page 139 and 140: Unit Testing parkingService = _park
Page 141: Unit Testing Filters Next, we are g
Page 145 and 146: Unit Testing '' + '' + 'Please info
Page 147 and 148: Unit Testing $httpBackend.flush();
Page 149 and 150: Unit Testing var _saveCar = functio
Page 151 and 152: Unit Testing At the moment, we have
Page 153 and 154: Unit Testing R
Page 155 and 156: Unit Testing 'src/parkingCtrl.js',
Page 159 and 160: Automating the Workflow Installatio
Page 161 and 162: Automating the Workflow grunt.initC
Page 167 and 168: Automating the Workflow } }); dist:
Page 169 and 170: Automating the Workflow } }, lib: {
Page 171 and 172: Automating the Workflow Cache The r
Page 173 and 174: directives 129 filters 128 service
Page 175 and 176: installation, Grunt 146 installatio
Page 177 and 178: two-way data binding $apply functio
Page 179 and 180: Dependency Injection with AngularJS
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AngularJS Essentials

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