运行使用 Jenkins 的 Protractor 测试抛出 "Test `title` should be a "string" 但给出了 "function"。'"

Question

所以这有点让人头疼。

如果我运行我们的 Protractor e2e 测试来自 Jenkins 作业，它会失败：

[10:23:53] I/local - Starting selenium standalone server...
[10:23:53] I/launcher - Running 1 instances of WebDriver
[10:23:54] I/local - Selenium standalone server started at http://10.0.0.5:43412/wd/hub
[10:23:56] E/launcher - Error: Error: Test `title` should be a "string" but "function" was given instead.
    at new Test (/var/jenkins/tools/jenkins.plugins.nodejs.tools.NodeJSInstallation/Node_5.0.0/lib/node_modules/mocha/lib/test.js:24:11)
    at context.it.context.specify (/var/jenkins/tools/jenkins.plugins.nodejs.tools.NodeJSInstallation/Node_5.0.0/lib/node_modules/mocha/lib/interfaces/bdd.js:84:18)
    at /var/jenkins/tools/jenkins.plugins.nodejs.tools.NodeJSInstallation/Node_5.0.0/lib/node_modules/protractor/node_modules/selenium-webdriver/testing/index.js:95:14
    at context.xit.context.xspecify.context.it.skip (/var/jenkins/tools/jenkins.plugins.nodejs.tools.NodeJSInstallation/Node_5.0.0/lib/node_modules/mocha/lib/interfaces/bdd.js:103:15)
    at Function.skip (/var/jenkins/tools/jenkins.plugins.nodejs.tools.NodeJSInstallation/Node_5.0.0/lib/node_modules/protractor/node_modules/selenium-webdriver/testing/index.js:98:14)
    at Suite.<anonymous> (/var/jenkins/workspace/vw3-predevelop-linux/src/Ui/dev/test/endToEnd/presetInteractions.scenario.js:87:8)
    at Object.create (/var/jenkins/tools/jenkins.plugins.nodejs.tools.NodeJSInstallation/Node_5.0.0/lib/node_modules/mocha/lib/interfaces/common.js:114:19)
    at context.describe.context.context (/var/jenkins/tools/jenkins.plugins.nodejs.tools.NodeJSInstallation/Node_5.0.0/lib/node_modules/mocha/lib/interfaces/bdd.js:42:27)
    at Object.<anonymous> (/var/jenkins/workspace/develop-linux/src/Ui/dev/test/endToEnd/presetInteractions.scenario.js:8:1)
    at Module._compile (module.js:425:26)
[10:23:56] E/launcher - Process exited with error code 100

但是，如果我作为 Jenkins 用户使用相同版本的 Node (5.0.0) 和 npm (3.3.6) 以及相同的命令通过 ssh 连接到机器，测试运行正好。这是它在 mocha 中投入的地方：https://github.com/mochajs/mocha/blob/master/lib/test.js#L24 但我不明白为什么当 Jenkins 运行测试时它会是 "not a string"，但是当我 ssh 时它会很好。我还检查了我们的 presetInteractions.scenario.js 文件，但它与我们的任何其他量角器文件没有什么不同，而且第 8 行肯定没有什么奇怪的...

var Utils = require('./utils');
var chai = require('chai');
var chaiAsPromised = require('chai-as-promised');
chai.use(chaiAsPromised);

var expect = chai.expect;

describe('Preset interaction features', function() {
    before(function(done) {
        ...

Answer 1

所以，当然是版本不匹配了。我们检查了 NPM、Node 和 Protractor 的版本，但使用的 Mocha 版本确实不同（2.4.5 与 3.0.2）。回滚到 2.4.5 可消除此问题。

运行使用 Jenkins 的 Protractor 测试抛出 "Test `title` should be a "string" 但给出了 "function"。'"

Running Protractor tests with Jenkins throws "Test `title` should be a "string" but "function" was given instead.'"

continuous-integration

mocha.js

node.js

jenkins

protractor

运行 使用 Jenkins 的 Protractor 测试抛出 "Test `title` should be a "string" 但给出了 "function"。'"

Running Protractor tests with Jenkins throws "Test `title` should be a "string" but "function" was given instead.'"

continuous-integration

mocha.js

node.js

jenkins

protractor

运行使用 Jenkins 的 Protractor 测试抛出 "Test `title` should be a "string" 但给出了 "function"。'"