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require 'rails_helper'
describe FormHelper do
describe 'form_errors' do
it 'returns nil when model has no errors' do
model = double(errors: [])
expect(helper.form_errors(model)).to be_nil
end
it 'renders an alert div' do
model = double(errors: errors_stub('Error 1'))
expect(helper.form_errors(model)).
to include('<div class="alert alert-danger" id="error_explanation">')
end
it 'contains a summary message' do
single_error = double(errors: errors_stub('A'))
multi_errors = double(errors: errors_stub('A', 'B', 'C'))
expect(helper.form_errors(single_error)).
to include('<h4>The form contains the following error:')
expect(helper.form_errors(multi_errors)).
to include('<h4>The form contains the following errors:')
end
it 'renders each message' do
model = double(errors: errors_stub('Error 1', 'Error 2', 'Error 3'))
errors = helper.form_errors(model)
aggregate_failures do
expect(errors).to include('<li>Error 1</li>')
expect(errors).to include('<li>Error 2</li>')
expect(errors).to include('<li>Error 3</li>')
end
end
def errors_stub(*messages)
ActiveModel::Errors.new(double).tap do |errors|
messages.each { |msg| errors.add(:base, msg) }
end
end
end
end