Its pretty sad that this topic is just not covered until now. The guides even have a section about using the async test helpers for component unit (!!) tests when they are obviously NOT available in a unit test.
Today we have ember-1.13 and integration tests for components by default. But STILL there are no async test helpers available by default. One hast to create an applications instance and call injectTestHelpers on it, like its done in tests/helpers/start-app. It just feels less weird to do this, as the test is now called “integration” and not “unit” anymore, but why is it not in the default blueprints?
It would be nice if a member of the core can give an answer to this. @rwjblue maybe?