Note to the reviewer: Look at tests/util.js first and then
look at the others. Gerrit lets you ignore whitespace changes,
which I would recommend for this.
This emulates tests on the C++ side and dramatically reduces
boilerplate on the test code.
This also uses the beforeEach(async () => {}) trick to save
a lot of promise resolutions before each tests.
I try to clean up the style a bit as I go, seriously thinking
about adding eslint for at least the tests.
Change-Id: Iced4abb57f66572035ab5d1a54b374055e8aaa58
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/281439
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
