For each character class escape (\d, \D, \s, \S, \w, \W), check
positive cases (the escape matches all characters it's supposed to
match) and negative cases (the escape doesn't match any of the
characters it should not match). Each of these checks is also done in
Unicode mode and with the v flag.
This uses regenerate.js from the unicode-property-escapes-tests
repo to generate strings that contain exactly the characters that
are supposed to be matched or not matched for each escape.
Comparison is done with regex test instead of regex replace to
optimize the tests.
This is part of my work at the SYSTEMF lab at EPFL.
Avoid modifying the regenerate library object prototype.
Our config files specify two-space indents for JS files. These scripts
were probably written before that was a thing. Update the indentation of
the script and the generated tests all in one go.
This code hasn't been touched in a while, so it's probably good to bring
in the newest versions of the dependencies. We can easily tell if there
was any incompatible effect on the output.
The latest version of filenamify requires using ES modules. We also have
to adapt to a breaking change in regexpu-core (see
https://github.com/mathiasbynens/regexpu-core/pull/49).
Also convert the dependencies to devDependencies, since this tool is not
necessary for executing test262.
