Previously all browser globals were allowed to be used anywhere by
ESLint because we had set the `env` property to `browser` in the ESLint
config. This has made it easy to accidentally use browser globals
(e.g. #8338), so it has been removed. Instead we now have a short list
of allowed globals.
All browser globals are now accessed as properties on `window`.
Unfortunately this change resulted in a few different confusing unit
test errors, as some of our unit tests setup assumed that a particular
global would be used via `window` or `global`. In particular,
`window.fetch` didn't work correctly because it wasn't patched by the
AbortController polyfill (only `global.fetch` was being patched).
The `jsdom-global` package we were using complicated matters by setting
all of the JSDOM `window` properties directly on `global`, overwriting
the `AbortController` for example.
The `helpers.js` test setup module has been simplified somewhat by
removing `jsdom-global` and constructing the JSDOM instance manually.
The JSDOM window is set on `window`, and a few properties are set on
`global` as well as needed by various dependencies. `node-fetch` and
the AbortController polyfill/patch now work as expected as well,
though `fetch` is only available on `window` now.
Errors without stack traces would break the Sentry error processing,
which assumes the presence of a stack trace. Many errors don't have any
stack trace though, such as uncaught promises.
This breakage resulting in the app state being missing from the error
report, and a console warning.
Any error sent to Sentry will now be marked with the environment they
were sent from. The environment is set at build time, and is set
dependant upon the build flags and CI-related environment variables.
Setting the environment will let us filter error reports in Sentry to
focus specifically upon reports sent from production, release
candidates, PR testing, or whatever else.
Previously, all errors encountered during testing or production were
sent to the primary `metamask` Sentry project, whereas development
errors were sent to `test-metamask` instead. This change ensures that
errors encountered during tests are sent to `test-metamask` as well.
