using puppeteer to run unit tests of a class definition raise an "class is not defined"

Hi,

I’m currently working on a library to replace localStorage using a hybrid model of memory storage and IndexedDB (https://github.com/sagrath23/indexedDB). I want to test my specification of IndexedDBStorage, using Jest and Puppeteer (to get a real instance of window.indexedDB), but, when i execute the test suite, i get this error:

Evaluation failed: ReferenceError: IndexedDBStorage_1 is not defined

      at <anonymous>:7:45
      at step (tslib.js:129:27)
      at Object.next (tslib.js:110:57)
      at tslib.js:103:75
          at new Promise (<anonymous>)
      at __awaiter (tslib.js:99:16)
      at <anonymous>:2:36
      at ExecutionContext.evaluateHandle (node_modules/puppeteer/lib/ExecutionContext.js:66:13)
          at <anonymous>
      at process._tickCallback (internal/process/next_tick.js:188:7)

and this is the test case definition:

fit("should create empty storage", (async (done) => {
    const browser = await puppeteer.launch()

    try {
      const page = await browser.newPage()

      //to pass __awaiter function
      await page.addScriptTag({path: "./tslib.js", content: "text/javascript"})
      //to pass IndexedDB Class definition
      await page.addScriptTag({path: "./bundle.js", content: "text/javascript"})

      // tslint:disable-next-line:only-arrow-functions
      const store = await page.evaluate(async function() {
        const store = new IndexedDBStorage("idbTest")
        await store.init()
        return store
      })

      expect(store).toBeDefined()
      expect(store.getStorage()).toBeDefined()

      await browser.close()
      done()

    } catch (err) {
      await browser.close()
      done.fail(err)
    }
  }))

Enviroment to reproduce

• Puppeteer version: 0.12.0
• Platform / OS version: Windows 10
• node version: 8.9.1
• Jest version. 21.2.1

[aslushnikov]

closing this since this is a babel issue with a good suggested workaround.

[entrptaher]

It says IndexedDBStorage_1 but your code does not have that. Are you using babel? Seems like the first post had a babel mangle issue. In the meantime, this issue might help you, https://github.com/GoogleChrome/puppeteer/issues/1270