Testing custom model functions in unit tests...

rubyonrails-talk
1

I have a custom function, for kicks:

def find_newest   Card.find(:last) end

In my unit test I want to:

assert_kind_of(Card,Card.find_newest)

But I get the "method not found" error.

What am I missing?

-Tom

2

Rather, it should be noted that find_newest is in my model...

3

I answered my own thought... in the unit test, I have an object, created via fixtures, @c and I am able to call the proper method, and get back the proper value, passing the assertion.

(I figured I would stuff "find newest" into the model)

4

I answered my own thought... in the unit test, I have an object, created via fixtures, @c and I am able to call the proper method, and get back the proper value, passing the assertion.

What you shoud probably do is create find_newest as a class method, ie

  def self.find_newest   ...   end

rather than requiring an instance of the class for something that is not specific to any particular instance

Fred

5

And don't write the Card constant within the method once you do this, since self in a class method is the class.

def self.find_newest   find(:last) end

6

In my unit test I want to:

assert_kind_of(Card,Card.find_newest)

But I get the "method not found" error.

After you apply the 'def self.find_newest', look up my assert_latest, to learn its Card.maximum(:id) trick:

Note that the online version of assert_latest is fully productized...

7

Interesting.

Thanks for the thoughts, guys!