jsApiReporter was initially added as part of the pre-1.0 Ruby based browser
runner. It looks like it was designed to resolve a race condition betweeen
jasmine-core's startup in the browser and the Ruby runner's startup. Modern
runners handle that either by buffering messages in a custom reporter (e.g.
jasmine-browser-runner's BatchReporter) or by calling env.execute() after a
communication channel has been set up (e.g. the old Jasmine ruby gem). In
any other context, a custom reporter is easier to use than jsApiReporter
because it doesn't require polling.
Adding jsApiReporter to the env imposes small but measurable penalties in
time and space, both of which are proportional to the size of the test
suite.
Other than jasmine-py and Testdouble's jasmine-rails gem, neither of which
ever supported jasmine-core 4 or later, I can find scant evidence of
interest and no evidence of usage after about 2012.
This isn't comprehensive but it should be broad enough to ensure that most
people who would be affected by blocking monkey patching see a warning.
Covers the jasmine namespace as well as classes that are monkey patched by
zone.js.
Replacing globals (describe/it/etc) doesn't trigger a warning because they
belong to the user and are expected to be replaced.
Pretty printing is occasionally useful outside of the places where a
configured pretty printer is injected (matchers and asymmetric equality
testers). Users sometimes use the private basicPrettyPrinter for that.
jasmine.pp is part of the public interface and uses the current runable's
custom object formatters.
Injected DOM wrappers were a nice idea in theory but everyone just passes
wrappers around document.createElement/document.createTextNode. That
includes HtmlReporter's unit tests and karma-jasmine-html-reporter, the
only known 5.x-compatible library that constructs an HtmlReporter.