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Exercism PureScript Test Runner

The Docker image for automatically run tests on PureScript solutions submitted to exercism.

This repository contains the PureScript test runner, which implements the test runner interface.

Running the Tests in Docker container

To run a solution's test in the Docker container, do the following:

  1. Open terminal in project's root
  2. Run ./bin/run-in-docker.sh <exercise> <solution-folder> <output-folder>

Design Goal and Implementation

Due to the sandboxed environment we need to prepare everything we need in advance. All the PureScript packages that may be used for a solution are downloaded and pre-compiled. To make this happen we've setup a basic spago project under ./pre-compiled. Note that the package-set set in packages.dhall must correspond with the one used by in the exercises repository (exercism/purescript). This directory is copied into the Docker image and from there all dependencies are installed and compiled. All the necessary bits are then available to be used by bin/run.sh to setup a spago project to build the submitted solution.

The bin/run.sh script will piece together a spago project to build and test the submitted solution. The project is built under /tmp/build which is mounted as a tmpfs which is required for write-access. A tmpfs is also speedier than reading from or writing to a bind mount. See docs/spago.md for more details on running spago in a sandbox.