Minitest v4 and v5 Jul 14 2014

The current version of Minitest is 5, this is what we get if you do gem install minitest. However, chances are that our version is 4, because it is the version included in Ruby. I mean, if we didn’t install Minitest explicitly, then we are using the one packet with the interpreter.

For us, the main difference is the class we need to inherit.

In version 4, we inherit from MiniTest::Unit::TestCase. Example:

require 'minitest/autorun'

class FizzBuzzTest < MiniTest::Unit::TestCase
  def test_1_is_1
    assert_equal "1", FizzBuzz.new.convert(1)
  end
end

Note that the Minitest module is MiniTest with a capital T.

In version 5, we inherit from Minitest::Test. Example:

require 'minitest/autorun'

class FizzBuzzTest < Minitest::Test
  def test_1_is_1
    assert_equal "1", FizzBuzz.new.convert(1)
  end
end

Now, the module is Minitest and the hierarchy changed.

If we prefer the spec syntax, we don’t have to change anything.

require 'minitest/autorun'

describe FizzBuzz do
  it "is '1' when receives 1" do
    assert_equal "1", FizzBuzz.new.convert(1)
  end
end

This code works well in both versions.