Why do i need to use minitest/autorun?

Question

Why do i require minitest/autorun instead of test/unit for generating unit test

require 'test/unit'

class Brokened
  def uh_oh
    "I needs fixing"
  end
end

class BrokenedTest < Minitest::Test
  def test_uh_of
    actual = Brokened.new
    assert_equal("I'm all better now", actual.uh_oh)
  end
end

Running the above code, interpreter raise warning

You should require 'minitest/autorun' instead

Because `test/unit` is deprecated : http://stackoverflow.com/a/28598052/2483313 — spickermann, Dec 16 '15 at 17:30
@spickermann i wanted to know the reason behing it, i know code would work if i replace it, but y do i have to do that. Any insight — Rajnish, Dec 16 '15 at 17:32

score 7 · Accepted Answer · edited May 23 '17 at 11:45

Your code example will end in a NameError: uninitialized constant Minitest.

You have two possibilities:

Use test/unit in combination with Test::Unit::TestCase or
use require 'minitest/autorun' in combination with Minitest::Test.

test/unit is deprecated and it is recommended to use minitest (MiniTest is faster and smaller).

If you switch the test gem you must change perhaps some more things:

replace require "test/unit" with require "minitest/autorun"
replace Test::Unit::TestCase with with Minitest::Test
There is no assert_nothing_raised (details)
assert_raise becomes assert_raises.
perhaps some other issues

You may use require 'minitest' instead require 'minitest/autorun' - you will get no syntax error, but there is also no test execution. If you want to execute tests, you must call them on your own (see minitest-a-test-suite-with-method-level-granularity)

Why do i need to use minitest/autorun?

1 Answers1