This encapsulates selectors logic in one place, in a preparation for more complex scenarios like main-world selectors or piercing frames.
Note: we had `Page.fill should wait for visible visibilty` test, but we do not actually wait for visible in page.fill(). It happened to pass due to lucky evaluation order.
References #1316.
This patch:
- removes `browserType.downloadBrowserIfNeeded()` method. The method
turned out to be ill-behaving and cannot not be used as we'd like to (see #1085)
- adds a `browserType.setExecutablePath` method to set a browser
exectuable.
With this patch, we take the following approach towards managing browser downloads:
- `playwright-core` doesn't download any browsers. In `playwright-core`, `playwright.chromium.executablePath()` returns `null` (same for firefox and webkit).
- clients of `playwright-core` (e.g. `playwright` and others) download browsers one way or another.
They can then configure `playwright` with executable paths and re-export the `playwright` object to their clients.
- `playwright`, `playwright-firefox`, `playwright-chromium` and `playwright-webkit` download
browsers. Once browsers are downloaded, their executable paths are saved to a `.downloaded-browsers.json` file. This file is read in `playwright/index.js` to configure browser executable paths and re-export the API.
- special case is `install-from-github.js` that also cleans up old browsers.
This patch starts respecting `PLAYWRIGHT_DOWNLOAD_HOST` env variable
in `playwright` package and it's vendored flavors (`playwright-firefox`,
`playwright-chromium` and `playwright-webkit`).
Fixes#1045
This patch makes it so all our packages, like `playwright` and
browser-specific flavors, download browsers to their
directories rather then using directory of `playwright-core`.
This way yarn@1 caches are not busted: they didn't expect that directory
content might change after packages's explicit install step
is failed, there's that was what we were doing.
Fixes#1085
