Turned RequestScheduler.prioritize off for karma tests

[lilleyse]

From here: #3241

Fix test failures when running with Karma (makes Travis CI fail): npm run test -- --exclude WebGL --browsers Electron --failTaskOnError --suppressPassed

This disables request prioritization since it interferes with tests that expect a request to go through immediately. I made a similar fix before for jasmine tests: https://github.com/AnalyticalGraphicsInc/cesium/blob/3d-tiles/Specs/spec-main.js#L61-L62

@pjcozzi @mramato is there a better alternative here?

[mramato]

I'm OK with this change since it's the simplest solution. The only alternative would be to enabled/disable it in beforeAll/afterAll for the specific test suites that need it.

Travis is still failing because of WebGL tests that are not tagged correctly, but I assume you'll fix that in another PR?

[lilleyse]

The only test failing for me is Core/Recatangle can pack... and it's fine in master.

[mramato]

The only test failing for me is Core/Recatangle can pack... and it's fine in master.

The problem is you are running locally on a webgl enabled browser. There are 8 test failures:
https://travis-ci.org/AnalyticalGraphicsInc/cesium/builds/149837649#L937

To reproduce locally, disable WebGL in Firefox and then run the Cesium non-webgl unit tests.

[mramato]

Rectangle.pack fails because the packable interface changed recently and that function now needs to return the packed array (i.e. the result parameter). That will fix it.

[lilleyse]

To reproduce locally, disable WebGL in Firefox and then run the Cesium non-webgl unit tests.

Ah alright.

Rectangle.pack fails because the packable interface changed recently and that function now needs to return the packed array (i.e. the result parameter). That will fix it.

Rectangle.pack looks ok to me. I'm not sure why it's failing.

I fixed the other tests.

[mramato]

Thanks, I'll check out the Rectangle test and see if it's an easy fix.

[pjcozzi]

@lilleyse please cherry pick this for #3476. Also merge master into that branch.