auto_test_package chokes on tests/testthat directory

[doogiecode]

Hi there, I just started using testthat and am having a problem when I try to run my tests continuously while I work. I followed the instructions on the Github readme file and set up my tests to all be contained in a directory named testthat in the tests directory of my package. However, when I try to run auto_test_package from the root directory of my package I get this:

> auto_test_package(".")
Public sweetr tests : .....


Error in digest(path, file = TRUE) : 
  The specified pathname is not a file: /Users/proffitt/Code/R/sweetr-package/sweetr/tests/testthat

Is this expected? The command dies at that point and goes back to the R prompt. Any insight would be appreciated.

[doogiecode]

Also, this guy Phil seems to be having the same issue: http://stackoverflow.com/questions/21010985/auto-test-package-throws-error-even-though-test-package-passes