Test view helper methods without having to render the whole view in Rails using rails console

application_helper.rb with rails console code

# E.g. You have this code to format float values in your view
module ApplicationHelper
  def format_number(value, precision: 4)
    number_with_precision(value, precision:, strip_insignificant_zeros: true, delimiter: ',')
  end
end

# You can test the method format_number() using `helper.method_name` in rails console 
$ rails c
=> helper.format_number(120.0019)
#=> 120.0019
=> helper.format_number(9000.0300)
#=> 9,000.03