foo_test.rb

# minitest 4.7

# running: ruby test_foo.rb results in a passing test
# running the test through sublime/rubytest or the rubymine editor results in a failing test
#  fail's reason: out is empty and so is err

class TestFoo < Minitest::Unit::TestCase
  def test_my_binary
    out, err = capture_subprocess_io do
      system '../../bin/foo version'
    end

    assert_match /Foo/, out
  end
end