This patch implements a new mode of network tethering for Playwright
server & its clients.
With this patch:
- playwright server could be launched with the
`--browser-proxy-mode=tether` flag to engage in the new mode
- a new type of client, "Network Tethering Client" can connect to the
server to provide network traffic to the browsers
- all clients that connect to the server with the `x-playwright-proxy:
*` header will get traffic from the "Network Tethering Client"
This patch also adds an environment variable
`PW_OWNED_BY_TETHER_CLIENT`. With this env, playwright server will
auto-close when the network tethering client disconnects. It will also
auto-close if the network client does not connect to the server in the
first 10 seconds of the server existence. This way we can ensure that
`npx playwright docker start` blocks terminal & controls the lifetime of
the started container.
We have to reliably know whether test timed out or not, and soft expect
error could have marked it with `status=failed` but it would still time
out. Now we have a separate `_didTimeout` flag for this.
Fixes#18023.
- Rename internal selectors `has`, `control` and `attr` to
`internal:has`, `internal:control` and `internal:attr`.
- Fix `getByLabel()` to respect strictness, by introducing
`internal:label` selector.
- Move tests essential for ports to `selectors-by.spec`.
This makes `HttpServer` accept `preferredPort` option that will first
try to listen on that port, and if that port is already in use, listen
on some available port instead.
Fixes#17201.
Fixes#17412.
Supercedes #17413.
- if configured via playwright.config.ts, relative paths should be
relative to the config.
- if configured via env var, should be relative to `cwd`
Currently, we ues `#root` vs `#root > *` selector for component roots
depending on the number of root children. This heuristic detects
fragments that render multiple elements inside the root.
However, this does not work with empty fragments that do not render
anything.
The fix is to make the `#root >> control=component` selector that would
dynamically detect the root. This supports empty fragments and also
allows for dynamic updates of the fragments.
Allows to set workers as a percentage of logical CPUs, for example
"50%".
Examples :
```bash
npx playwright test --workers 3
npx playwright test --workers 50%
```
```js
const config: PlaywrightTestConfig = {
// ...
workers: '33%',
}
```
