This adds a `toBeComponentOfType` method to `reactComponentExpect`. Now that we are injecting composite native components, `toBeDOMComponentWithTag` will not suffice and should be deprecated.
This expects static children as additional arguments to the constructor
and flattens any array arguments one level deep.
Component(props, child1, child2, arrayOfChildren, child3) ->
.props.children = [child1, child2, ...arrayOfChildren, child3]
This can avoid an additional heap allocation for the unflat array.
It allows you to pass nested arrays and objects like you used to. Those
aren't immediately flattened. That makes this a fairly safe change.
Passing a dynamic array without key properties will yield a warning
(once). Might consider throwing later.
Once we change the transpiler to use the new syntax, you'll end up with
a single flat array in normal usage.
This doesn't actually update the JSX transform.
CommitSyncScript
Paul O’Shannessy