javascript - 类型错误 : Attempted to assign to readonly property

Question

我在为指令编写测试时遇到了这个错误(使用 generator-angular-module):

src/capitalize.js:

'use strict';

angular.module('jviotti.string', []).filter('capitalize', function() {

  return function(input) {
    return input.replace(/\w\S*/g, function(txt) {
      return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();
    });
  };

});

测试/规范/capitalize.js:

'use strict';

describe('Filter: capitalize', function () {

  // load the controller's module
  beforeEach(module('jviotti.string'));

  var capitalize;
  beforeEach(inject(function($filter) {
    capitalize = $filter('capitalize');
  }));

  it('should capitalize a string', function () {
    expect(capitalize('hello')).toBe('Hello');
  });

});

但是，当使用 PhantomJS 运行 Karma 时，我得到:

PhantomJS 1.9.2 (Mac OS X) Filter: capitalize should capitalize a string FAILED
    TypeError: Attempted to assign to readonly property.
        at workFn (/Users/jviotti/Projects/angular-string/bower_components/angular-mocks/angular-mocks.js:2107)
    TypeError: 'undefined' is not a function (evaluating 'capitalize('hello')')
        at /Users/jviotti/Projects/angular-string/test/spec/capitalize.js:14
PhantomJS 1.9.2 (Mac OS X): Executed 2 of 2 (1 FAILED) (0.1 secs / 0.017 secs)

我错过了什么？

Answer 1

karma.conf.js 的变化

  logLevel: config.LOG_INFO,

到

  logLevel: config.LOG_DEBUG,

和 PhantomJS 到 Firefox，然后你会得到更详细的错误消息