require 'dry/validation/predicates' RSpec.describe Dry::Validation::Predicates do describe '#filled?' do let(:predicate_name) { :filled? } context 'when value is filled' do let(:arguments_list) do [ ['Jill'], [[1, 2, 3]], [{ name: 'John' }], [true], [false], ['1'], ['0'], [:symbol], [String] ] end it_behaves_like 'a passing predicate' end context 'with value is not filled' do let(:arguments_list) do [ [''], [[]], [{}], [nil] ] end it_behaves_like 'a failing predicate' end end end