Suite Library variables not consistent over different Test Cases

Question

I have a Python Class which i reference in one suite and is defined in a file. It is instantiated over the Library keyword:

*** Settings ***
Library    MyTab.py   testfile01.txt     Test Procedure   WITH NAME ResultFile

MyTab.py:

class MyTab():
    def __init__(self, file, Title):
        self.tabfile = open(file, 'w')
        ...
    def write_header(self, UEBER: string):
        ....
        self.tabfile.write(...)
    def add_zeile(self, zeile: string):
        ....
        self.tabfile.write(...)

In the Robot file i reference this file

Test01
    ResultFile.write header      Pos., Test , Designation, Serial Number, Text
    ResultFile.add zeile   aaa,bbb,ccc,ddd
    ...
    ResultFile.add zeile   eee,ddd,hhh,ddd

All is working very well

Test01
    ResultFile.write header      Pos., Test , Designation, Serial Number, Text
    ResultFile.add zeile   aaa,bbb,ccc,ddd
    ResultFile.add zeile   eee,ddd,hhh,ddd
    ResultFile.add zeile   YYY,YYY,YYY,YYY
    ResultFile.add zeile   ZZZ,ZZZ,ZZZ,ZZZ

Now i have a file (written threw my python class) with the content

aaa,bbb,ccc,ddd
eee,ddd,hhh,ddd
YYY,YYY,YYY,YYY
ZZZ,ZZZ,ZZZ,ZZZ

But with several Test Cases, every time i have a new test case, the class is presumabley instantiated new and i get only the content from the last call of the last test suites:

Test01
    ResultFile.write header      Pos., Test , Designation, Serial Number, Text
    ResultFile.add zeile   aaa,bbb,ccc,ddd
    ...
    ResultFile.add zeile   eee,ddd,hhh,ddd
Test02
    ResultFile.add zeile   YYY,YYY,YYY,YYY
    ...
    ResultFile.add zeile   ZZZ,ZZZ,ZZZ,ZZZ

The content is the content from the last Test Suite:

YYY,YYY,YYY,YYY
ZZZ,ZZZ,ZZZ,ZZZ

All is working wonderful in one single Test Case.

When i have several TestCases, the Python class is instantiated every time i have a new Test Case. I think i could declare the Library Global or for the Suite, but haven't had any success in doing so, maybe i declare i in the wrong part.

What do i have to do to get the Library (or Variables) stable/consistent over a whole suite with different Test Cases?

Suite Library variables not consistent over different Test Cases

0 Answers