使用预期条件时未定义属性'bind'

I'm trying to use the expected conditions function to make protractor wait for the presence of items on a page before continuing.

我正在尝试使用预期条件函数使量角器在继续之前等待页面上的项目的存在。

http://angular.github.io/protractor/#/api?view=ExpectedConditions

http://angular.github.io/protractor/#/api?view=ExpectedConditions

I have followed the example in the docs, but I am getting an error about an undefined property.

我已经按照文档中的示例进行操作，但是我收到有关未定义属性的错误。

This seems to be the case when using any expected condition, not just related to the presenceOf function I am using here:

这似乎是在使用任何预期条件时的情况，而不仅仅与我在这里使用的presenceOf函数有关：

var EC = protractor.ExpectedConditions
var pixels = element.all(by.repeater('item in items'))
var pixelsLoaded = EC.presenceOf(pixels)

browser.wait(pixelsLoaded,10000)

Failed: Cannot read property 'bind' of undefined Stack: TypeError: Cannot read property 'bind' of undefined at [object Object].ExpectedConditions.presenceOf (/foo/bar/node_modules/gulp-protractor/node_modules/protractor/lib/expectedConditions.js:233:33) at Env. (/foo/bar/app/features/pixelmanager/test/pixelManagerPOTest.js:48:31) at /foo/bar/node_modules/gulp-protractor/node_modules/protractor/node_modules/jasminewd2/index.js:95:14 at [object Object].promise.ControlFlow.runInFrame_ (/foo/bar/node_modules/gulp-protractor/node_modules/protractor/node_modules/selenium-webdriver/lib/webdriver/promise.js:1877:20) at [object Object].promise.ControlFlow.runEventLoop_ (/foo/bar/node_modules/gulp-protractor/node_modules/protractor/node_modules/selenium-webdriver/lib/webdriver/promise.js:1755:8) at [object Object]. (/foo/bar/node_modules/gulp-protractor/node_modules/protractor/node_modules/selenium-webdriver/lib/webdriver/promise.js:2056:12) at goog.async.run.processWorkQueue (/foo/bar/node_modules/gulp-protractor/node_modules/protractor/node_modules/selenium-webdriver/lib/goog/async/run.js:125:21) at runMicrotasksCallback (node.js:337:7) at process._tickCallback (node.js:355:11) From: Task: Run it in control flow at Object. (/foo/bar/node_modules/gulp-protractor/node_modules/protractor/node_modules/jasminewd2/index.js:94:33) ==== async task ==== Error at Suite. (/foo/bar/app/features/pixelmanager/test/pixelManagerPOTest.js:44:5) at Object. (/foo/bar/app/features/pixelmanager/test/pixelManagerPOTest.js:9:1) at Module._compile (module.js:460:26) at Object.Module._extensions..js (module.js:478:10) at Module.load (module.js:355:32) at Function.Module._load (module.js:310:12)

失败：无法读取未定义的属性'bind'Stack：TypeError：无法读取[object Object]中未定义的属性'bind'.ExpectedConditions.presenceOf（/ foo / bar / node_modules / gulp-protractor / node_modules / protractor / lib / expectedConditions .js：233：33）在环境。 （/foo/bar/app/features/pixelmanager/test/pixelManagerPOTest.js:48:31）/foo/bar/node_modules/gulp-protractor/node_modules/protractor/node_modules/jasminewd2/index.js:95:14 at在[object Object]处的[object Object] .promise.ControlFlow.runInFrame_（/foo/bar/node_modules/gulp-protractor/node_modules/protractor/node_modules/selenium-webdriver/lib/webdriver/promise.js:1877:20）。在[object Object]处的promise.ControlFlow.runEventLoop_（/foo/bar/node_modules/gulp-protractor/node_modules/protractor/node_modules/selenium-webdriver/lib/webdriver/promise.js:1755:8）。 （/foo/bar/node_modules/gulp-protractor/node_modules/protractor/node_modules/selenium-webdriver/lib/webdriver/promise.js:2056:12）goog.async.run.processWorkQueue（/ foo / bar / node_modules / gulp-protractor / node_modules / protractor / node_modules / selenium-webdriver / lib / goog / async / run.js：125：21）at processMicrotasksCallback（node.js：337：7）at process._tickCallback（node.js：355： 11）来自：任务：在对象的控制流中运行它。 （/foo/bar/node_modules/gulp-protractor/node_modules/protractor/node_modules/jasminewd2/index.js:94:33）====异步任务====套件错误。 （/foo/bar/app/features/pixelmanager/test/pixelManagerPOTest.js:44:5）在Object。 （/foo/bar/app/features/pixelmanager/test/pixelManagerPOTest.js:9:1）在Module._compile（module.js：460：26）的Object.Module._extensions..js（module.js：478） ：10）在Function.Module._load的Module.load（module.js：355：32）（module.js：310：12）

1 个解决方案

#1

Fixed by removing the improper call to all:

通过删除对所有人的不正当呼叫来修复：

var pixels = element(by.repeater('item in items'));