Fix JSONSerializer to pass through payload.included

[tstirrat]

Respect an underlying JSON-API payload's included property.

Prior to this, records extracted via EmbeddedRecordsMixin were being truncated and forgotten.

See #3549

[tstirrat]

The tests pass locally for me but I am sure my test is not actually running!!

is there some way to isolate just this test? or do integration tests need separate command?

[fivetanley]

If you use npm start, then visit on localhost:4200, you can click on the individual test, or use the dropdown menu, to isolate tests or suites of tests.

[tstirrat]

@fivetanley ok thanks, got it!

My tests are not running with npm test. is this a problem?

[fivetanley]

It looks like it is, at least on travis: https://travis-ci.org/emberjs/data/builds/71138302#L552

[tstirrat]

They run with npm start and they run on travis.. but not locally.

as a test, I deleted the entire /packages/ember-data/tests/unit folder and it made no difference to the total test count.

975 tests complete (11519 ms)

surely that should have dropped by at least 100..

Anyway, I can get by using npm start but this shows something is weird with npm test

[fivetanley]

npm test doesn't do a full build, so you're likely getting an old build. we should probably fix that.

to re-run with npm test, use ember build --environment production and then npm test.

[tstirrat]

ok, np, tests are passing now.

[kmiyashiro]

Would love for embedded records to not be broken 👍

[wecc]

included could be undefined here, we should add a check

[tstirrat]

@wecc fixed, added isolating test

[wecc]

Awesome, thanks @tstirrat!

ping @bmac, release