nocontainer param no longer hides the container

[runspired]

regardless of checkbox state the container is shown.

[runspired]

just coming back to this to see if anyone has looked into why? it's been broken almost 2 years.

[runspired]

The answer is that these lines:

ember-qunit/addon-test-support/index.js

Lines 86 to 89 in 4720360

	let testContainer = document.getElementById('ember-testing-container');
	if (!testContainer) {
	return;
	}

run before the DOM is fully constructed.

in my test's index.html I needed to move

    <div id="qunit"></div>
    <div id="qunit-fixture">
      <div id="ember-testing-container">
        <div id="ember-testing"></div>
      </div>
    </div>

above

    <script src="/testem.js" integrity=""></script>
    <script src="{{rootURL}}assets/vendor.js"></script>
    <script src="{{rootURL}}assets/test-support.js"></script>

    <script src="{{rootURL}}assets/dummy.js"></script>
    <script src="{{rootURL}}assets/tests.js"></script>

This is a funny "gotya" because everything about the tests continues to work as normal except this one feature. I suspect that feature should be made to grab the html element lazily.