The `DEBUG=*page npm run unit` is too verbose due to events spamming
the console.
This patch starts tracing emitted events only if there are any
listeners.
The page.waitForFunction method allows to wait for a general predicate.
The predicate will be continiously polled for in page, until
it either returns true or the timeout happens.
The polling parameter could be one of the following:
- 'raf' - to poll on every animation frame
- 'mutation' - to poll on every dom mutation
- <number> - to poll every X milliseconds
References #91
This patch:
- implements a basic public API coverage based on 'helper.tracePublicAPI' methods
- adds `npm run coverage` command which reports coverage after running all of the unit tests
References #50.
This patch improves on page.evaluate to accept a string.
The string can have a trailing '//# sourceURL=' comment which would
name the evaluation to make stacks beautiful.
In order to make sourceURL comments possible, this patch:
- removes wrapping of the client function into `Promise.resolve()`
- stops passing `awaitPromise` parameter to `Runtime.evaluate`
- starts to await promise via the `Runtime.awaitPromise` if the return type of the evaluation
is promise
closes#118
This patch stops serializing console API arguments unless there are
listeners of the 'console' event in puppeteer.
This saves quite a lot CPU cycles.
Fixes#117.
This patch:
- introduces helper.addEventListener/helper.removeEventListeners
to simplify event management
- moves NavigatorWatchdog over to the helper.addEventListener to
stop leaking event listeners
