require 'spec_helper' describe 'Veritas::Logic::Proposition#inspect' do subject { object.inspect } let(:klass) { Class.new(Logic::Proposition) } let(:object) { klass.new } before do klass.stub!(:name).and_return('Veritas::Logic::Proposition') end specify { expect { subject }.to raise_error(NotImplementedError, "#{klass.name}.call must be implemented") } end