adding basic coverage for istanbul

[henrjk]

No description provided.

[christiansmith]

Looks good! Thanks!

[henrjk]

The coverage.sh script collects coverage data running the tests as follows:

1. in coverage/integration/ running the integration tests.
2. in coverage/unit/ running the unit tests.

The scripts then combines these reports and save the totals in coverage/.
All coverage reports can be viewed in the browser. For example on OS X like this:

open coverage/lcov-report/index.html

Here is an example of an invocation in the master branch:

dev$ ./coverage.sh 

19:27:51 access: GET /v1/clients 400 13ms
  ․․․19:27:51 access: GET /v1/clients 200 4ms
... many lines removed...
  228 passing (2s)
  6 pending

=============================================================================
Writing coverage object [/Users/dev/code/work/connect2/coverage/integration/coverage.json]
Writing coverage reports at [/Users/dev/code/work/connect2/coverage/integration]
=============================================================================

=============================== Coverage summary ===============================
Statements   : 47.12% ( 1122/2381 )
Branches     : 19.2% ( 217/1130 )
Functions    : 36.52% ( 153/419 )
Lines        : 48.81% ( 1090/2233 )
================================================================================


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  971 passing (8s)
  21 pending

=============================================================================
Writing coverage object [/Users/dev/code/work/connect2/coverage/unit/coverage.json]
Writing coverage reports at [/Users/dev/code/work/connect2/coverage/unit]
=============================================================================

=============================== Coverage summary ===============================
Statements   : 81.74% ( 1647/2015 )
Branches     : 71% ( 727/1024 )
Functions    : 77.59% ( 225/290 )
Lines        : 84.35% ( 1633/1936 )
================================================================================
Done

[christiansmith]

@henrjk thanks for adding some context to this for posterity. Work is in progress on #272 submitted by @vsimonian to wrap this in an npm command.