This refactoring makes it easier to write advanced tests and
gives full control over what's happening to the test code.
It also forces description for every test.
BUG=none
Review-Url: https://codereview.chromium.org/2891213002
Cr-Commit-Position: refs/heads/master@{#45412}
Added a test that Runtime.getProperties doesn't truncate Set and Map properties in [[Entries]] in internalProperties.
BUG=chromium:650729
R=dgozman@chromium.org
Review-Url: https://codereview.chromium.org/2376863002
Cr-Commit-Position: refs/heads/master@{#39940}