Adds tests for JS objects with functions with positional and
optional parameters. It does not include named arguments as those
should be statically disallowed.
Change-Id: I24acadc8160d3515bb79b00dc6ab28b528e2b039
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/148221
Commit-Queue: Srujan Gaddam <srujzs@google.com>
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Srujan Gaddam