Ensure the presence of an HTML element in a directive when conducting unit tests

I have developed a custom directive called "generate-form-field-directive" that dynamically generates a form field based on the type received. Here is the code snippet for the directive -

(function () {
"use strict";

var app = angular.module("appModule");

app.directive("generateFormField", generateFormField);

/*@ngInject*/
function generateFormField() {

    return {
        restrict: "E",

        scope: {
            attributeDetails: "=",
            fieldName: "="
        },

        replace: false,

        controller: function($scope, actionStore) {
            var vm = this;                   
        },

       template: "<div class='col-sm-9 generate-form-field-container'>" +

                    "<input type='text' class='form-control' name='{{fieldName}}' ng-if='attributeDetails.type === \"String\"' ng-model='attributeDetails.value' required>" +
                    "<input type='number' class='form-control' name='{{fieldName}}'' ng-if='attributeDetails.type === \"Integer\"' ng-model='attributeDetails.value' required>" +
                 "</div>"

    };
}

}());

If the attributeDetails.type is "String", the first input tag will be rendered. Similarly, for attributeDetails.type = integer. Now, I want to verify whether the "input[type=text]" element is present in the DOM or not when passing the object - { "type":"String", "name": "Name", "value": "Volume1" }.

The unit test file is as follows -

describe("UNIT DIRECTIVE: generateFormField", function () {
"use strict";

// Angular injectables
var $compile, $rootScope, $httpBackend, $q;

// Module defined (non-Angular) injectables
var $scope, generateFormField, actionStore;

// Local variables used for testing
var element, formRequestResponse, directiveScope, vm, template, getListOptions;

// Initialize modules
beforeEach(function () {
    module("appModule");
});

beforeEach(function () {

    inject(function (_$compile_, _$rootScope_, _$httpBackend_, _$q_, _actionStore_) {
        $compile = _$compile_;
        $rootScope = _$rootScope_;
        $httpBackend = _$httpBackend_;
        $q = _$q_;
        $scope = $rootScope.$new();            
    });
});

describe("generateFormField unit testing", function() {

    beforeEach(function() {
        template = "<generate-form-field attribute-details='attribute' field-name='key'></generate-form-field>";            
        $scope.attribute = {
           "type":"String",
           "name": "Name",
           "value": "Volume1"
      };

        $scope.key = "volName";
        element = $compile(template)($scope);     

        directiveScope = element.find("generate-form");

        // Exercise SUT
        $scope.$digest();
    });

   **//how to check for input[type=text]**
   it("it should create input button of type='text'", function() {
        //expect(element.html()).indexOf("type='text'").to.not.equal(-1);
        //expect(element("input[type=text]").length).to.be(1);
    });

});
});

It would be greatly appreciated if you could provide a functional fiddle for this. Thank you in advance.

Answer №1

Once you execute the following code:

element = $compile(template)($scope); 

You will then be able to locate your input field:

var input = element[0].querySelector("input[type=text]");

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