Add tests for synchronous dns

[jarlamsa]

Description

Add test cases for synchronous dns.

Pull request type

[ ] Fix
[ ] Refactor
[ ] Target update
[x] Functionality change
[ ] Breaking change

[jarlamsa]

@0xc0170 Was there some issue in Travis last week, the logs look like some issues in the Travis job itself?

[jarlamsa]

@mikaleppanen @SeppoTakalo @kjbracey-arm please review

[0xc0170]

@0xc0170 Was there some issue in Travis last week, the logs look like some issues in the Travis job itself?

Yes, it looks fine now

[0xc0170]

Looks fine to me (besides naming of the test cases being upper case - but shall be addressed by separate fix).

One change - can you review astyle travis job (one line should be fixed)

[jarlamsa]

Done. It would be easier to notice if there is something to be done in the astyle if it would directly report that the check wasn't successful, now you basically need to separately open the logs each time to see if there is something wrong.

[0xc0170]

Done. It would be easier to notice if there is something to be done in the astyle if it would directly report that the check wasn't successful, now you basically need to separately open the logs each time to see if there is something wrong.

I'll look at this, it should have reported how many files needs changing +/- , we will fix

To add some details - we are currently still cleaning up the code base. Errors in the style will come most probably in the next release (still around 500 files to be cleaned). I'll send another PR to decrease the count.

[jarlamsa]

@0xc0170 Can the CI be initiated for this PR?

[0xc0170]

/morph build

[mbed-ci]

Build : SUCCESS

Build number : 2941
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/7879/

Triggering tests

/morph test
/morph export-build
/morph mbed2-build

[mbed-ci]

Test : SUCCESS

Build number : 2690
Test logs :http://mbed-os-logs.s3-website-us-west-1.amazonaws.com/?prefix=logs/7879/2690

[jarlamsa]

Test was successful but I can't even see exporter being built at all. Is the CI working as expected?

[0xc0170]

/morph export-build
/morph mbed2-build

[mbed-ci]

Exporter Build : FAILURE

Build number : 2562
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/exporter/7879/

[0xc0170]

License server error (fixed now)

/morph export-build

[mbed-ci]

Exporter Build : SUCCESS

Build number : 2563
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/exporter/7879/