The COS Faker

Hi Community,

This post is to introduce one of my first project in COS, I created when started to learn the language and until today I'm keeping improve it.

The CosFaker(here on Github) is a pure COS library for generating fake data.

cosFaker vs Populate Utils

So why use cosFaker if caché has the populate data utility?

Ok the populate utility has great things, like the SSN Generator for example, but what to do when you have a field with a long description of a product? How to check if that table will list the emails or if that calculated property will count the days of the last user interaction.

For me cosFaker is a populate utils with steroids! You can use together with the Populate, to generate %Stream or long strings, or random Dates.

e.g.

Class Sample.Product Extends (%Persistent, %Populate, %XML.Adaptor)
{

  Property Type As %String;
  Property Notes As %String(MAXLEN = 250, MINLEN = 10);
  Property Name As %String;
  Property Origin As %String;
  Property LastInteraction As %TimeStamp;

Method OnPopulate() As %Status [ ServerOnly = 1 ]
{
   Set tSC = $$$OK
   Try {
      Set ..Type = "Coffee"
      Set ..Name = ##class(cosFaker.Coffee).BlendName()
      Set ..LastInteraction = ##class(cosFaker.Dates).Backward($Random(80))
      Set ..Notes = ##class(cosFaker.Coffee).Notes()
      Set ..Origin = ##class(cosFaker.Coffee).Origin()
   } Catch tException {
      Set:$$$ISOK(tSC) tSC = tException.AsStatus()
   }
   Quit tSC
}
}

 Do ##class(Sample.Product).Populate(10)

And it's great to write unit tests like that:

Method TestPersonLogin() As SampleProject.DataModel.Person
{
   Set person = ##class(Sample.DataModel.Person).%New()
   Set person.FirstName = ##class(cosFaker.Name).FirstName()
   Set person.LastName = ##class(cosFaker.Name).LastName()
   Set person.Email = ##class(cosFaker.Internet).Email(person.FirstName, person.LastName)
   Do $$$AssertStatusOK(person.%Save())

   Set matcher=##class(%Regex.Matcher).%New("\A([\w+\-].?)+@[a-z\d\-]+(\.[a-z]+)*\.[a-z]+\z")
   Set matcher.Text = person.Email
   Do $$$AssertTrue(matcher.Locate())
   Do $$$AssertEquals(person, ##class(Sample.DataModel.Person).%OpenId(person.%Id()))
}

cosFaker is FUN!!

Yes, cosFaker is fun... Insted of names like "Gibbs, Zoe K.", you have "Goku" or "Piccolo" using ##class(cosFaker.DragonBall).Character()

And a lot of funny stuffs like Pokemon Name Generator, Star Wars Planets or Droids, Coffee, UFC Fighters Names, Lorem Ipsum, etc...

So, That's all folks

Cheers