Now that headless mode is built into the main Ladybird executable, the
headless-browser's only purpose is to run tests. So let's move it to the
testing directory and rename it to test-web (a la test-js / test-wasm).
We currently create a separate headless-browser application to serve two
purposes:
1. Allow headless browsing to take a screenshot of a page or print its
layout tree / internal text.
2. Run the LibWeb test framework.
This patch migrates (1) to the main Ladybird executable. The --headless
flag enables this mode. This matches the behavior of other browsers, and
means we have one less executable to ship at distribution time.
We want to avoid creating too many AppKit / Qt facilities in headless
mode. So this involves some shuffling of application init to ensure we
don't create them until after we've parsed the command line arguments.
Namely, we avoid creating the NSApp in AppKit and QCoreApplication in
Qt. Doing so also requires that we don't create the application event
loop until we've parsed the command line as well, because the loop we
create depends on whether we're creating those UI facilities.
We currently create web views through the headless Application, so that
the Application can store the views for easy iteration/management. We
would like to move HeadlessWebView into LibWebView to make headlessness
a feature of the primary Ladybird binaries. In order to do so, we need
to remove this indirection, as we won't have this test-only Application
class in Ladybird.
Especially on new setups, it is handy for `headless-browser --run-tests`
to "just work". Anyone using ladybird.py will have LADYBIRD_SOURCE_DIR
set in their environment already.
This commit adds a "echo_server_port" property to `WebContentOptions`.
Additionally, it makes `Application::web_content_options()` return a
mutable reference instead of a const reference so that we can set the
port value from the fixture.
This adds a verbosity option to log the start and end of each test, with
the duration taken for the test. To be able to use this option with our
exisiting verbosity flag, without cluttering stdout with other data, we
add verbosity levels to headless-browser. The level is increased by
providing the -v flag on the command line multiple times.
LibWebView now knows how to launch RequestServer and ImageDecoderServer
without help from the UI, so let's move ownership of these services over
to LibWebView for de-duplication.
