ruby-on-railsrspecruby-on-rails-5rspec-rails

Rspec : is there a matcher to match array of arrays, not testing order


I try to test if two arrays of arrays contain same elements, without testing order of elements. (Rails 5.2 / Rspec-rails 3.8.2)

exemple :

[['a1', 'a2'], ['b1', 'b2']]
[['b2', 'b1'], ['a2', 'a1']]

I tried with match_array and with contain_exactly but this works only for the first level of my array.


  tab1 = [['a1', 'a2'], ['b1', 'b2']]
  tab2 = [['b1', 'b2'], ['a1', 'a2']]
  tab3 = [['a2', 'a1'], ['b2', 'b1']]
  tab4 = [['b2', 'b1'], ['a2', 'a1']]

  expect(tab1).to match_array tab2  # true
  expect(tab1).to match_array tab3  # false
  expect(tab1).to match_array tab4  # false

Is there a matcher to do this ? Or maybe a simple way with composable matchers ? Thanks

EDIT The solution I find is to do :

expect(tab1).to contain_exactly(contain_exactly('a1', 'a2'),
                                contain_exactly('b1', 'b2'))

but I would like to find something like this

expect(tab1).to ....... tab2

Solution

  • I think I found a solution. Thanks to comment if you think that it does not always work.

    it 'checks that arrays contain the same elements (do not check order)' do
      tab1 = [['a1', 'a2'], ['b1', 'b2']]
      tab4 = [['b2', 'b1'], ['a2', 'a1']]
      expect(tab1.map(&:sort)).to match_array(tab4.map(&:sort))
    end