# Testing paraview python script
**URL:** https://discourse.paraview.org/t/testing-paraview-python-script/3147
**Category:** ParaView Support
**Created:** [December 9, 2019, 12:24pm UTC](https://discourse.paraview.org/t/testing-paraview-python-script/3147 "2019-12-09T12:24:16Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@gilcu2](https://discourse.paraview.org/u/gilcu2)
#### Post date: [December 9, 2019, 12:24pm UTC](https://discourse.paraview.org/t/testing-paraview-python-script/3147/1 "2019-12-09T12:24:16Z")
I am trying to do testing (pytest) with my Paraview script. I was thinking that simple.ResetSession() cleans everything but when running the second test it renders object from the first although I reset after the first.
Which is the the way of testing paraview python?
Thanks
---
### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [December 9, 2019, 12:28pm UTC](https://discourse.paraview.org/t/testing-paraview-python-script/3147/2 "2019-12-09T12:28:44Z")
Please provide steps to reproduce your issue.
---
### Author:  [@gilcu2](https://discourse.paraview.org/u/gilcu2)
#### Post date: [December 9, 2019, 12:46pm UTC](https://discourse.paraview.org/t/testing-paraview-python-script/3147/3 "2019-12-09T12:46:27Z")
from paraview . simple import \*
```
class TestBoth:
def test_sphere(self):
model = Sphere(Center=[-1,0,0])
render_view = GetActiveViewOrCreate('RenderView')
rep = Show(model, render_view)
SaveScreenshot("sphere.png", render_view)
ResetSession()
def test_cilinder(self):
model = Box(Center=[1,0,0])
render_view = GetActiveViewOrCreate('RenderView')
rep = Show(model, render_view)
SaveScreenshot("box.png", render_view)
ResetSession()
```
If I run each test alone I get the image of Sphere and Box respectively but if I run both tests box.png have the attached image. How can I say pv that forget every thing for the next test. 
---
### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [December 9, 2019, 12:49pm UTC](https://discourse.paraview.org/t/testing-paraview-python-script/3147/4 "2019-12-09T12:49:41Z")
Looks like `ResetSession()` is indeed quite limited. You can replace it by
```
Disconnect()
Connect()
```
---
### Author:  [@gilcu2](https://discourse.paraview.org/u/gilcu2)
#### Post date: [December 9, 2019, 12:51pm UTC](https://discourse.paraview.org/t/testing-paraview-python-script/3147/5 "2019-12-09T12:51:48Z")
Worked, thanks:slightly\_smiling\_face:
```
from paraview . simple import *
class TestBoth:
def test_sphere(self):
Connect()
model = Sphere(Center=[-1,0,0])
render_view = GetActiveViewOrCreate('RenderView')
rep = Show(model, render_view)
SaveScreenshot("sphere.png", render_view)
Disconnect()
def test_cilinder(self):
Connect()
model = Box(Center=[1,0,0])
render_view = GetActiveViewOrCreate('RenderView')
rep = Show(model, render_view)
SaveScreenshot("box.png", render_view)
Disconnect()
```
---
### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [December 10, 2019, 9:59am UTC](https://discourse.paraview.org/t/testing-paraview-python-script/3147/6 "2019-12-10T09:59:35Z")
Follow up issue : [https://gitlab.kitware.com/paraview/paraview/issues/19516](https://gitlab.kitware.com/paraview/paraview/issues/19516)