Exercism Pyret Track

Exercism exercises in Pyret.

Setup

If you're solving Exercism exercises offline, you'll need a recent copy of pyret-npm (0.0.27+). Currently, pyret-npm works on Linux and MacOS platforms although Windows users can run it via the WSL. However, you can also use Pyret's online IDE. In that case, you'll need to switch from the IDE's default essentials2021 namespace to the older essentials2020 supported by pyret-npm.

Support

For support with Pyret in Exercism, please visit the Pyret subcategory on the official Exercism forum.

Coding Style

Please consult the official Pyret style guide.

Testing

To test the exercises, run ./bin/verify-exercises on a Linux or MacOS platform. This command will iterate over all exercises and check to see if their exemplar/example implementation passes all the tests.

Contributing Guide

Please see Exercism's contributing guide.

At the moment, there's not a generator for Pyret exercises.

Here's the basic template for an exercise-slug-test.arr. Each check block corresponds to a single test case, and the string label is reported to the student. Each check block is wrapped inside a no-parameter function which is then stored inside the run field of a test value of the TestRun datatype. This test value also contains an active field which indicates whether a test should be run (true) or not (false). All test values go inside a list that Pyret iterates over at runtime, executing the functions within each test value marked as active.

A contributor is responsible for copying this template, adding the appropriate functions and check blocks, and populating the list at the bottom.

use context essentials2020

include file("exercise-slug.arr")

#|
  When working offline, all tests except the first one are skipped by default.
  Once you get the first test running, unskip the next one until all tests pass locally.
  Check the block comment below for further details.
|#

fun foo-returns-1():
  check "foo returns 1":
    foo() is 1
  end
end

fun bar-returns-2():
  check "bar returns 2":
    bar() is 2
  end
end

#|
  Code to run each test. Each line corresponds to a test above and whether it should be run.
  To mark a test to be run, replace `false` with `true` on that same line after the comma.
  test(test-a, true) will be run. test(test-a, false) will be skipped.
|#

data TestRun: test(run, active) end

[list: 
  test(foo-returns-1, true),
  test(bar-returns-2, false),
].each(lam(t): when t.active: t.run() end end)

Track linting

configlet is an Exercism-wide tool for working with tracks. You can download it by running:

./bin/fetch-configlet

Run its lint command to verify if all exercises have all the necessary files and if config files are correct:

$ ./bin/configlet lint

The lint command is under development.
Please re-run this command regularly to see if your track passes the latest linting rules.

Basic linting finished successfully:
- config.json exists and is valid JSON
- config.json has these valid fields:
    language, slug, active, blurb, version, status, online_editor, key_features, tags
- Every concept has the required .md files
- Every concept has a valid links.json file
- Every concept has a valid .meta/config.json file
- Every concept exercise has the required .md files
- Every concept exercise has a valid .meta/config.json file
- Every practice exercise has the required .md files
- Every practice exercise has a valid .meta/config.json file
- Required track docs are present
- Required shared exercise docs are present