This commit un-deprecates DeprecatedString, and repurposes it as a byte
string.
As the null state has already been removed, there are no other
particularly hairy blockers in repurposing this type as a byte string
(what it _really_ is).
This commit is auto-generated:
$ xs=$(ack -l \bDeprecatedString\b\|deprecated_string AK Userland \
Meta Ports Ladybird Tests Kernel)
$ perl -pie 's/\bDeprecatedString\b/ByteString/g;
s/deprecated_string/byte_string/g' $xs
$ clang-format --style=file -i \
$(git diff --name-only | grep \.cpp\|\.h)
$ gn format $(git ls-files '*.gn' '*.gni')
The Test262RunnerHandler class in test-test262 was made in order to
spawn a subprocess, connect to its input/output error pipes, and obtain
its return value.
Later on, a copy of this implementation was added to TestSed with
modifications, such as adding support for reading from the output pipes
as well.
Unify these two implementations into a new Core::Command class. This new
implementation is more closely modeled from the TestSed implementation
due to the extra functionality it implemented.
While the tests for sed itself are simple to begin with, some
infrastructure was needed to make them simple.
Firstly, there was no home for tests for the applications under
Utilities, so I had to create a new subdirectory under Tests to host
them.
Secondly, and more importantly, there was previously no easy way to
launch an executable and easily feed it with data for its stdin, then
read its stdout/err and exit code. Looking around the repo I found that
the JS tests do a very similar thing though, so I decided to adapt that
solution for these tests, but with the higher purpose of someday moving
this new Process class to LibCore/Process, where the existing spawn
helpers are still very low level, and there is no representation of a
Process object that one can easily interact with.
Note that this Process implementation is very simple, offers limited
functionality, and it doesn't use the EventLoop, so it can break on long
inputs/outputs depending on the executable behavior.
