As part of moving to use the dart test package instead of the deprecated unittest, we need to find a way of dealing with iit and ddescribe. In the test package exclusive specs are not natively supported and test files are read one at a time. This means that we can patch iit using Guinness, but it will only work within one file.

There are two ways around this. We can have one master-test-file which calls out to all other tests (ugly). Or, we can modify the workflow slightly. This is what I propose below:

Guinness2 will patch iit to create a test with a tag - test(name, fn, {tags: 'solo'}). This tag by itself will do nothing. Then, introduce a new gulp task - gulp test.unit.dart.solo which will expand to pub run test --tags="solo". The only change in user workflow is needing to run this task when using iit or ddescribe.