How to use a custom keyword from other custom keywords and step definition classes in Katalon Studio

Important:

You have a Katalon Studio Enterprise license.

Besides built-in keywords, Katalon Studio also allows users to create custom keywords for these purposes:

Creating reusable scripts
Extending testing capability
Setting up testing projects with a specific pattern

Initially, custom keywords are designed use in test cases. Combined with built-in keywords, custom keywords can help perform a complete test scenario.

Here is an example of a custom keyword, which prints out a parameter.

class ParamTypes {
  @Keyword
  def map_variables(Map <String, String> my_map) {
    println my_map
  }
}

The keyword can be used in a test case via CustomKeywords class

CustomKeywords.'ParamTypes.map_variables'([('last name') : 'smith', ('first name') : 'john'])

In Katalon Studio, the test case Script is not the only place that allows users to script. Users can script at the custom keyword class and the BDD step definition class. Unfortunately, you will get the following error message when calling the custom keyword in these classes:

Test Cases/Tips and Tricks/Custom Keywords/Params - Map FAILED because (of) (Stack trace: 
groovy.lang.MissingPropertyException: No such property: CustomKeywords for class: com.common.types.ParamTypes

In the custom keyword class and the BDD step definition class, custom keywords cannot be called directly as in test case via CustomKeywords class. They can be called as methods of a groovy class. Here are two options you can choose to get it work:

Option 1: Create a new instance of the class and call the method

def param_types = new ParamTypes()
param_types.map_variables([('last name') : 'smith', ('first name') : 'john'])

Option 2: Declare the custom keyword as static

class ParamTypes {
  @Keyword
  def static map_variables(Map <String, String> my_map) {
    println my_map
  }
}

and call the method

ParamTypes.map_variables([('last name') : 'smith', ('first name') : 'john'])