Posted about 5 years ago. Visible to the public.

Shoulda Matchers: how to test conditional validations

Shoulda Matchers Archive don't provide canditional validations (validations with if: option). Here is how to write tests for the condition:


class Employee < ActiveRecored::Base validates :office, presence: true, if: manager? def manager? ... end end


describe Employee do describe '#office' do context 'is a manager' do before { allow(subject).to receive(:manager?).and_return(true) } it { validate_presence_of(:office) } end context 'is not a manager' do before { allow(subject).to receive(:manager?).and_return(false) } it { is_expected.not_to validate_presence_of(:office) } end end end

By refactoring problematic code and creating automated tests, makandra can vastly improve the maintainability of your Rails application.

Owner of this card:

Daniel Straßner
Last edit:
about 5 years ago
by Daniel Straßner
About this deck:
We are makandra and do test-driven, agile Ruby on Rails software development.
License for source code
Posted by Daniel Straßner to makandra dev
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