Fix failing unit tests

[mousetraps]

Right now it's difficult to detect regressions.
https://ci.appveyor.com/project/mousetraps/nodejstools/branch/master

[mjbvz]

"Fixed" by #731, in that we just disabled a bunch of tests that were failing in Appveyor.

I'm going to close this for now, but I suggest we open more scoped issues to track enabling specific sets of these tests again (see #672 for example).