How to test custom inputs?

[Tanguy Krotoff]

Hi,

I have written a custom input for simple_form and I would like to know how to (unit) test it.

I'm reading simple_form source code to see how tests work but it is a bit cryptic for me.

I guess a good example inside simple_form documentation would be a nice addition.

Regards,

[Tanguy Krotoff]

Jumping into the code is the way of the Jedi :)

Here how I do it:

# Here my custom input

# File app/inputs/date_pair_input.rb

class DatePairInput < SimpleForm::Inputs::Base

  def input

    [...]

  end

end

# My unit test for my custom input

# File test/unit/inputs/date_pair_input_test.rb

class MyInputTest < ActionView::TestCase

  include SimpleForm::ActionViewExtensions::FormHelper

  # Taken from simple_form/test/support/misc_helpers.rb

  def with_concat_form_for(*args, &block)

    concat simple_form_for(*args, &(block || proc {}))

  end

  # Taken from simple_form/test/support/misc_helpers.rb

  def with_input_for(object, attribute_name, type, options={})

    with_concat_form_for(object) do |f|

      f.input(attribute_name, options.merge(:as => type))

    end

  end

  test "MyInput" do

    # This is my model

    event = Event.new

    event.title = 'My event title'

    event.starts_at = Time.new(2012, 02, 15, 23, 21)

    event.ends_at = event.starts_at + 1.hour

    # Test the text input that comes built-in with simple_form

    with_input_for event, :title, :text

    assert_select 'textarea.text#event_title'

    # Test my custom DatePairInput

    html = with_input_for event, :starts_at, :date_pair

    assert html.include? '2012-02-15'

    assert html.include? '11:30pm'

  end

end

If you know a better way...

[Carlos Antonio da Silva]

How about creating a form with simple form, and making use of the input you're creating? Then you can just test for the output, that's basically how we do in SimpleForm :)

-- 

At.

Carlos Antonio