使用预期条件时未定义 属性 'bind'

Question

我正在尝试使用预期条件函数让量角器在继续之前等待页面上存在项目。

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

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

这似乎是使用任何预期条件时的情况，而不仅仅是与我在这里使用的 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)

Answer 1

已通过删除对 all 的不正确调用进行修复：

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