javascript - Testcafe - 在测试用异常(exception)测试命令行参数

Question

随着我越来越熟悉 Testcafe，我尝试使用命令行参数为用户提供有关如何运行测试的更多信息。出于这个原因，我正在使用 minimist 包。

但是，我无法打印或使用测试用例之外的任何变量。请在下面找到我的代码。

import { Selector } from 'testcafe';
import minimist from 'minimist';

const args = minimist(process.argv.slice(2));
const env = args.env;

console.log('*** A SAMPLE CONSOLE OUTPUT ***'); // does not print

fixture `Getting Started`
  .page `http://devexpress.github.io/testcafe/example`;

test('My first test', async t => {
  console.log('*** ANOTHER SAMPLE CONSOLE OUTPUT ***'); // prints
  await t
    .typeText('#developer-name', 'John Smith')
    .wait(1000)
    .click('#submit-button')

    // Use the assertion to check if the actual header text is equal to the expected one
    .expect(Selector('#article-header').innerText).eql('Thank you, John Smith!');
});

我想写一个 if 语句来检查 env === '' 或使用默认参数。

我怎样才能做到这一点？

Answer 1

However, I cannot print or use any variables outside the test cases.  

请使用编程方式来运行TestCafe。我已经更改了代码示例 (test.js) 并创建了一个以编程方式运行 TestCafe 的文件 (run.js)。将这些文件放入一个文件夹中，然后在您的终端中执行命令 'node run.js --env value'。然后你会看到如下输出:

'*** A SAMPLE CONSOLE OUTPUT ***'
Getting Started
value

test.js

import { Selector } from 'testcafe';
import minimist from 'minimist';

const args = minimist(process.argv.slice(2));
const env = args.env;

console.log('*** A SAMPLE CONSOLE OUTPUT ***'); 

fixture `Getting Started`
  .page `http://devexpress.github.io/testcafe/example`;

test('My first test', async t => {
  console.log(env); // prints
  await t
    .typeText('#developer-name', 'John Smith')
    .wait(1000)
    .click('#submit-button')
    .expect(Selector('#article-header').innerText).eql('Thank you, John Smith!');
});

run.js
const createTestCafe = require('testcafe');
let runner           = null;

createTestCafe('localhost', 1337, 1338, void 0, true)
    .then(testcafe => {
        runner = testcafe.createRunner();
    })
    .then(() => {
         return runner
            .src('test.js')
            .browsers('chrome')
            .run()
            .then(failedCount => {
                console.log(`Finished. Count failed tests:${failedCount}`);
                process.exit(failedCount)
            });
    })
    .catch(error => {
        console.log(error);
        process.exit(1);
    });