Configure CircleCI

[aherrmann]

• Add JUnit formatter to hspec tests
  • To run tests with reporting to terminal for development

    nix-shell --pure --run "cabal test --show-details=streaming --test-option=--color"

  • To run tests on CI

    nix-shell --pure --run 'cabal test --only --test-option=--ignore-dot-hspec --test-option=--out=/tmp/test/hspec-example.xml'

• Circle CI config
  • Use Cachix to cache the Nix shell
  • Build library and tests
  • Run tests and store results
  • Build haddock and store artifacts