Testing on the Raku track

Learn how to test your Raku exercises on Exercism

Run All Tests

There is a Raku script with the extension .rakutest, which will be used to test your solution. You can run through the tests by using the command (replacing the exercise name where relevant):

prove6 hello-world.rakutest

Before you start the exercise, the output will likely look something like:

# Failed test 'Say Hi!'
# at hello-world.rakutest line 11
# expected: 'Hello, World!'
#      got: (Nil)
# Looks like you failed 1 test of 1
hello-world.rakutest .. Dubious, test returned 1
Failed 1/1 subtests

You will either need to modify or create a module with the extension .rakumod, and write a solution to pass the tests. Once the tests are passing, the output from the command above will likely look something like:

hello-world.rakutest .. ok
All tests successful.

Stop After First Failure

If you have the RAKU_TEST_DIE_ON_FAIL environment variable set, the test runner will stop after the first failure. For example:

In Linux / OS X:

# now all the follow up runs will stop at the first failure
prove6 hello-world.rakutest
# until we do
# or you can use it for one run like this:
RAKU_TEST_DIE_ON_FAIL=1 prove6 hello-world.rakutest

Or in Windows:

REM now all the follow up runs will stop at the first failure
prove6 hello-world.rakutest
REM until we do

For more information see the Testing chapter of the Raku Documentation.


Could not find JSON::Fast

All modules used in the Raku track are included with Rakudo Star. If you get an error message such as the above when attempting to run a test, then you will either need to make sure you have the latest distribution of Rakudo Star, or install the module yourself using a package manager. See the Raku documentation on modules for information on how to install modules.