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minitest

Library for unit tests and assertions

0.5.1 Latest release released
ysbaddaden/minitest.cr
112 11

Minitest for Crystal

Unit tests and assertions for the Crystal programming language, using the fantastic minitest as reference.

Getting Started

Given that you'd like to test the following class:

class Meme
  def i_can_has_cheezburger?
    "OHAI!"
  end

  def will_it_blend?
    "YES!"
  end
end

Unit Tests

Define your tests as methods beginning with test_:

require "minitest/autorun"

class MemeTest < Minitest::Test
  def meme
    @meme ||= Meme.new
  end

  def test_that_kitty_can_eat
    assert_equal "OHAI!", meme.i_can_has_cheezburger?
  end

  def test_that_it_will_not_blend?
    refute_match /^no/i, meme.will_it_blend?
  end

  def test_that_will_be_skipped
    skip "test this later"
  end
end

Specs

Specs follow the same design rationale as the original Minitest: describe generates classes that inherit from Minitest::Spec, and it generates test methods.

require "minitest/autorun"

describe Meme do
  let(:meme) { Meme.new }

  describe "when asked about cheeseburgers" do
    it "must respond positively" do
      meme.i_can_has_cheezburger?.must_equal("OHAI!")
    end
  end

  describe "when asked about blending possibilities" do
    it "won't say no" do
      meme.will_it_blend?.wont_match(/^no/i)
    end
  end
end

You may use assertions in your specs (they'll work the same) or you may prefer the expect syntax:

expect(meme.i_can_haz_cheezeburger?).must_equal("OHAI!")
expect(meme.will_it_blend?).wont_match(/^no/i)

Run Tests

Eventually run the tests:

$ crystal run test/meme_test.cr spec/meme_spec.cr -- --verbose

You may filter your tests using an exact test name, or a regexp:

$ crystal run test/meme_test.cr -- -n test_that_kitty_can_eat
$ crystal run test/meme_test.cr -- -n /will/

When using Minitest::Spec with assertions or the expect syntax, you can avoid to taint Object with all the #must_ and #wont_ expectations:

$ crystal run -Dmt_no_expectations spec/meme_spec.cr

License

Distributed under the MIT License. Please see LICENSE for details.

Credits

  • Julien Portalier @ysbaddaden for the Crystal implementation
  • Ryan Davis @zenspider and seattle.rb for the original Ruby gem
minitest:
  github: ysbaddaden/minitest.cr
  version: ~> 0.5.1

Authors

  • Julien Portalier

License

MIT

Crystal

0.34.0

Dependencies 0

Development Dependencies 0

Dependents 23

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