Promise 中的 Testcafe Runner

Question

我是 Promise 的新手，所以需要知道如何将这个 testcafe runner 放在 Promise 函数中，以便我稍后可以使用它来调用 Promise.race

  const createTestCafe = require('testcafe');
    let testcafe         = null;

    createTestCafe('localhost', 1337, 1338)
        .then((tc) => {
            testcafe       = tc;
            const runner   = testcafe.createRunner();


            return runner
                .src(['test.ts'])
                .browsers(['chrome'])
                 .run({skipJsErrors:true});


    })

    .catch(failedCount => {
        console.log('Tests failed: ' + failedCount);
        testcafe.close();
    })
    .then(successCount => {
            console.log('Tests success: ' + successCount);
            testcafe.close();
    });

我需要 testcafe runner 作为 Promise 函数运行，我该怎么做？

Answer 1

TestCafe 的 Runner 类的run方法返回一个 promise，因此您可以使用与 TestCafe 实例相同的方式将其存储在变量中：

const createTestCafe = require('testcafe');
let testcafe = null;

const testRunPromise = createTestCafe('localhost', 1337, 1338)
    .then(tc => {
        testcafe = tc;
        const runner = testcafe.createRunner();


        return runner
            .src(['test.ts'])
            .browsers(['chrome'])
            .run({ skipJsErrors: true });
    });

testRunPromise
    .catch(failedCount => {
        console.log('Tests failed: ' + failedCount);
        testcafe.close();
    })
    .then(successCount => {
        console.log('Tests success: ' + successCount);
        testcafe.close();
    });

Promise.race([testRunPromise/*, yourAnotherPromise*/]);