The first would fail as we'd decrement the WaitGroup before adding to
it, and the escond would fail with a nil pointer dereference panic.
Add tests to reproduce both, and fix them.
For example, this can be useful if a user wants to simply add one flag
of their own, without otherwise messing with the default flags. In the
old codebase, they'd either have to build their own list from scratch,
or copy ours from source, needing to keep it in sync.
That way, cancelling a context while checking the error is much simpler.
The context data already holds onto the cancel func, so this requires no
internal changes.
This renders the Browser.Shutdown API obsolete, even though it doesn't
do exactly the same. If we want Cancel to do a proper shutdown action
before cancelling a browser context and killing the process, we could do
that change within the cancel logic.
Exposing NewAllocator and AllocatorOption was unnecessary, and it made
the API more complex to use and understand.
Instead, have users call NewExecAllocator directly. This removes some
code, and simplifies the examples and tests.
This way, the simple examples and tests don't need to do that
separately. Practically all users will want this cleanup work to be
synchronous, and practically all Go APIs are synchronous by default, so
this makes chromedp easier to use.
Remove the log option lines from testAllocate; right now, we don't have
these options for Target, and Target doesn't log much anyway. We can
always revisit this in the future.
While at it, simplify some code.
This vastly speeds up 'go test' on my laptop from ~10s to ~3s, as we
save a lot of time spinning up new Chrome browser processes.
In practice, each tab is a separate process anyway, but there's a lot of
added overhead if we're firing up the entire browser, particularly with
an empty user data dir.
This makes 'go test' racy now, as Browser doesn't support creating tabs
concurrently right now. Follow-up commits will fix that, with the help
of 'go test -race' after this commit.
All it did was wait on the entire allocator, which is confusing. From
the user's perspective, this wait method should instead wait for the
resources for its own browser, and not any other browsers sharing the
same allocator.
We haven't decided how to integrate that into our API, so simply replace
it with Allocator.Wait.
We hadn't noticed a few uncaught exceptions being received from the
browser, because the events were ignored. Start printing them via the
error logger.
The ones we were getting were caused by testAllocate running Navigate
actions when the path argument was empty. Navigating to "testdata/"
causes JS exceptions, as it's not a valid page.
Instead, leave the new target pointing at a blank document.
First, we want all of the functionality in a single package; this means
collapsing whatever is useful into the root chromedp package.
The runner package is being replaced by the Allocator interface, with a
default implementation which starts browser processes.
The client package doesn't really have a place in the new design. The
context, allocator, and browser types will handle the connection with
each browser.
Finally, the new API is context-based, hence the addition of context.go.
The tests have been modified to build and run against the new API.
It supports alternative names for Chrome such as chromium, as well as
extra names to look for like headless-shell.
Also swap the os.Getenv logic, so that we only do the exec.LookPath work
if the env var is unset.
1. Changes travis configuration to use the chrome addon
2. Adds more command line options to runner package
3. Removes grab-headless_shell.sh script
4. Cleans up and adds some environment variables for controlling how
unit tests are ran
5. Fixes a minor issue in chromedp-gen on comment output (for working
with latest protocol definition)
- Refactored chromedp-gen and cdp code so that Execute no longer returns
a channel
- Fixing potential race problems in handler
- Eliminated some dead code
- Updated examples to include new logging parameters
- Refactored API calls to be cleaner
- Changed types that shoudn't be exported to not-exported
- Updated examples with API changes
- Added unit test for Title action
