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ngStyleSpec.js
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ngStyleSpec.js
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'use strict';
describe('ngStyle', function() {
var element;
afterEach(function() {
dealoc(element);
});
it('should set', inject(function($rootScope, $compile) {
element = $compile('<div ng-style="{height: \'40px\'}"></div>')($rootScope);
$rootScope.$digest();
expect(element.css('height')).toEqual('40px');
}));
it('should silently ignore undefined style', inject(function($rootScope, $compile) {
element = $compile('<div ng-style="myStyle"></div>')($rootScope);
$rootScope.$digest();
expect(element.hasClass('ng-exception')).toBeFalsy();
}));
it('should not deep watch objects', inject(function($rootScope, $compile) {
element = $compile('<div ng-style="{height: heightObj}"></div>')($rootScope);
$rootScope.$digest();
expect(parseInt(element.css('height') + 0, 10)).toEqual(0); // height could be '' or '0px'
$rootScope.heightObj = {toString: function() { return '40px'; }};
$rootScope.$digest();
expect(element.css('height')).toBe('40px');
element.css('height', '10px');
$rootScope.heightObj.otherProp = 123;
$rootScope.$digest();
expect(element.css('height')).toBe('10px');
}));
it('should support binding for object literals', inject(function($rootScope, $compile) {
element = $compile('<div ng-style="{height: heightStr}"></div>')($rootScope);
$rootScope.$digest();
expect(parseInt(element.css('height') + 0, 10)).toEqual(0); // height could be '' or '0px'
$rootScope.$apply('heightStr = "40px"');
expect(element.css('height')).toBe('40px');
$rootScope.$apply('heightStr = "100px"');
expect(element.css('height')).toBe('100px');
}));
it('should support lazy one-time binding for object literals', inject(function($rootScope, $compile) {
element = $compile('<div ng-style="::{height: heightStr}"></div>')($rootScope);
$rootScope.$digest();
expect(parseInt(element.css('height') + 0, 10)).toEqual(0); // height could be '' or '0px'
$rootScope.$apply('heightStr = "40px"');
expect(element.css('height')).toBe('40px');
}));
describe('preserving styles set before and after compilation', function() {
var scope, preCompStyle, preCompVal, postCompStyle, postCompVal, element;
beforeEach(inject(function($rootScope, $compile) {
preCompStyle = 'width';
preCompVal = '300px';
postCompStyle = 'height';
postCompVal = '100px';
element = jqLite('<div ng-style="styleObj"></div>');
element.css(preCompStyle, preCompVal);
jqLite(window.document.body).append(element);
$compile(element)($rootScope);
scope = $rootScope;
scope.styleObj = {'margin-top': '44px'};
scope.$apply();
element.css(postCompStyle, postCompVal);
}));
afterEach(function() {
element.remove();
});
it('should not mess up stuff after compilation', function() {
element.css('margin', '44px');
expect(element.css(preCompStyle)).toBe(preCompVal);
expect(element.css('margin-top')).toBe('44px');
expect(element.css(postCompStyle)).toBe(postCompVal);
});
it('should not mess up stuff after $apply with no model changes', function() {
element.css('padding-top', '33px');
scope.$apply();
expect(element.css(preCompStyle)).toBe(preCompVal);
expect(element.css('margin-top')).toBe('44px');
expect(element.css(postCompStyle)).toBe(postCompVal);
expect(element.css('padding-top')).toBe('33px');
});
it('should not mess up stuff after $apply with non-colliding model changes', function() {
scope.styleObj = {'padding-top': '99px'};
scope.$apply();
expect(element.css(preCompStyle)).toBe(preCompVal);
expect(element.css('margin-top')).not.toBe('44px');
expect(element.css('padding-top')).toBe('99px');
expect(element.css(postCompStyle)).toBe(postCompVal);
});
it('should overwrite original styles after a colliding model change', function() {
scope.styleObj = {'height': '99px', 'width': '88px'};
scope.$apply();
expect(element.css(preCompStyle)).toBe('88px');
expect(element.css(postCompStyle)).toBe('99px');
scope.styleObj = {};
scope.$apply();
expect(element.css(preCompStyle)).not.toBe('88px');
expect(element.css(postCompStyle)).not.toBe('99px');
});
it('should clear style when the new model is null', function() {
scope.styleObj = {'height': '99px', 'width': '88px'};
scope.$apply();
expect(element.css(preCompStyle)).toBe('88px');
expect(element.css(postCompStyle)).toBe('99px');
scope.styleObj = null;
scope.$apply();
expect(element.css(preCompStyle)).not.toBe('88px');
expect(element.css(postCompStyle)).not.toBe('99px');
});
it('should clear style when the value is undefined or null', function() {
scope.styleObj = {'height': '99px', 'width': '88px'};
scope.$apply();
expect(element.css(preCompStyle)).toBe('88px');
expect(element.css(postCompStyle)).toBe('99px');
scope.styleObj = {'height': undefined, 'width': null};
scope.$apply();
expect(element.css(preCompStyle)).not.toBe('88px');
expect(element.css(postCompStyle)).not.toBe('99px');
});
it('should clear style when the value is false', function() {
scope.styleObj = {'height': '99px', 'width': '88px'};
scope.$apply();
expect(element.css(preCompStyle)).toBe('88px');
expect(element.css(postCompStyle)).toBe('99px');
scope.styleObj = {'height': false, 'width': false};
scope.$apply();
expect(element.css(preCompStyle)).not.toBe('88px');
expect(element.css(postCompStyle)).not.toBe('99px');
});
it('should set style when the value is zero', function() {
scope.styleObj = {'height': '99px', 'width': '88px'};
scope.$apply();
expect(element.css(preCompStyle)).toBe('88px');
expect(element.css(postCompStyle)).toBe('99px');
scope.styleObj = {'height': 0, 'width': 0};
scope.$apply();
expect(element.css(preCompStyle)).toBe('0px');
expect(element.css(postCompStyle)).toBe('0px');
});
});
});