Use ngsummary in unit testing

[Quramy]

It closes #6650 .

It allows ng test --aot.
If --aot option set, transform initTestEnvironment to add the 3rd argument aotSummaries (https://angular.io/api/core/testing/TestBed#initTestEnvironment) like replacing bootstrap method to use .ngfactory

limitation

It works only if angularCompilerPlugin is supported.

[lacolaco]

also have to add the same field into TestOptions interface

[Quramy]

Thanks for pointing out, I fixed it :)

[filipesilva]

@hansl can you check how this fits into the roadmap please?

[hansl]

After talking to @tbosch, AOT in unit tests is still experimental. We'll wait until it stabilizes before letting this PR in.

[Quramy]

@hansl Thanks for your comment.

Is tbosh currently working on stabilization? If it takes time for that work, I'd like you to consider reviewing and merging.

I implemented this PR's function as opt-in, and it never effect for users who do not use this option.

AOT in unit tests is still experimental.

I also understand it. But I have been using AOT unit-test since release angular/core v4.2.1 and I have never encountered any issues about this. And CLI users can not use AOT unit testing without ng eject and source code transformation by themselves(it's so painful..), also they are hard to report issues about AOT unit-testing.

[danwulff]

Any update on this? I'd love to be able to utilize aot unit testing now that aot compile time is much faster in 5.0

[JBoothUA]

I apologize if this is an inappropriate place to post this, but I've been stuck with AoT and Unit testing..

I see here that unit testing with AoT isn't officially supported, but I'm having a fundamental flaw with my source code.

it seems that JiT is required for unit testing and that requires component's templateurls and styleurls to be absolute.
Also, that AoT is required for our production and that requires component's templateurls and styleurls to be relative to the component.

what is the best practice for templateurls and styleurls if I wish to run AoT and also karma?

[hansl]

Closing this as AOT is experimental in unit tests. We are waiting for official word from the compiler team.

[dominique-mueller]

Any plans on introducing AoT in unit tests? Perhaps with Ivy?

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