Find angular testability objects across different dart js contexts by
registering each application in a global array and interrogating each
for testabilities.
Closes#3611
This fixes the following type error that is thrown when calling getAllAngularTestability() while running Dartium in checked mode:
type 'MappedListIterable' is not a subtype of type 'List<PublicTestability>' of 'publicTestabilities'.
These wrappers are not natively understood by
ts2dart. Removing them will improve Dart2JS
compilation due to fewer megamorphic calls to List
functions.
It also makes Angular code more succinct and
improves type safety in Angular due to better type
inference of the Array component type.
This change exposed several bugs in Angular.
In 'angular2/di' the symbol:
- Inject is a decorator
- InjectAnnotation is an annotation
Internally one an get a hold of annotations without *Annotations appened
(to make ts2dart work without workarounds) by importing from
'angular2/src/di/annotations_impl' instead of 'angular2/di'. This is
needed only for users that transpile through TS and through ts2dart.
Previously, getting testability was `window.angular2.getTestability`
This was because the plan was to export the API to the window as
angular2. However, the decision was changed to make this just `angular`
in 3177576ad6
To decouple testability from the rest of the Angular API, just make it
one function, `window.getAngularTestability`.
