[package:js] Add JS test for function parameters

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>

https://dart.googlesource.com/sdk/+/df36449d728c4cddcbeccd358bfbef3ea6f5fbb3
1 file changed
tree: bedd6b7637978ed8c406b4f9a16655e9cb578aa1
  1. commits.json