accessing static class variables with robotframework?

Question

Is it possible to access static class variables from a library loaded into robot framework?

For example, say I include the following python library in my .robot file:

foo = 'value'

class MyClass(self):
    bar = 'value'

Is there a way in the .robot file that included it to refer to foo or bar?

Answer 1

You can get at these by getting a reference to the raw python module with Get Library Instance, and then use extended variable syntax to get the values.

For example, consider a library named MyLibrary.py:

# MyLibrary.py
foo = "this is foo"

class MyClass(object):
    bar = "this is bar"

You can access foo and bar by using Get Library Instance to get a handle to the library:

*** Settings ***
| Library | MyLibrary.py

*** Test Cases ***
| Example of accessing variables in a library
| | ${lib}= | Get Library Instance | MyLibrary
| | 
| | Should be equal as strings | ${lib.foo} | this is foo
| | Should be equal as strings | ${lib.MyClass.bar} | this is bar

Answer 2

You should add ROBOT_LIBRARY_SCOPE = 'GLOBAL' to MyClass. If not Get Library Instance will create second instance of the MyClass.