Appropriately unit testing my models?

rubyonrails-talk
1

Try something like

class TestModel < Test::Unit::TestCase   def setup      @model_instance = Model.new   end

  ## add here whatever you can think as empty value   def test_should_not_body_be_empty     assert_error_on @model_instance, :body, :body => nil     assert_error_on @model_instance, :body, :body => ""   end

  # TODO: clean up this to use the first key of values hash as field   def assert_error_on(model, field, values = {})     # there is no assert here cuz others field may have errors     # and the idea is test one thing at time.     model.valid?     assert not model.errors[field].nil?   end

  # TODO: clean up this to use the first key of values hash as field   def assert_no_errors_on(model, field, values = {})     # there is no assert here cuz others field may have errors     # and the idea is test one thing at time.     model.valid?     assert model.errors[field].nil?   end end

Try to keep your tests clean, do one thing at time, and reflect that thing in the test name. And add as many test you need. Always remember that Test Cases are classes so add helper method to avoid repetitive tasks is not only good, its a must.

With this idea in mind test something like this:

class Model < ActiveRecord::Base   validates_presence_of :name   validates_length_of :name, :in => 4..128   validates_uniqueness_of :name end

will take at least one test per validation, but you probably wrote the tests first right? :stuck_out_tongue: