Error Message: Tried to run command without establishing a connection When running multiple tests with unit test

Question

I am having an issue in which all of my tests function correctly when run individually. However, when I try to run all the tests in the file, I get the error Message: Tried to run command without establishing a connection. I know the tests work because they run individually, but I need to be able to run all the tests without running them one by one. My code currently looks like this:

import unittest
from selenium import webdriver
from selenium.webdriver.common.keys import Keys
import os
import time
from selenium.webdriver.firefox.firefox_binary import FirefoxBinary

gecko = os.path.normpath(os.path.join(os.path.dirname(__file__), 'geckodriver'))
binary = FirefoxBinary('C:\Program Files (x86)\Mozilla Firefox\Firefox.exe')
driver = webdriver.Firefox(firefox_binary=binary, executable_path=gecko+'.exe')

class PythonOrgSearch(unittest.TestCase):

    def setUp(self):
        self.driver = driver

    def test_business_excellence_opens(self):
        driver.get("http://url.network.com")
        self.assertIn("Page Title", driver.title)

    def test_home_links(self):
        driver.find_element_by_id('webapps').click()
        self.assertTrue('SPT facilitates the cultural change' in self.driver.page_source)
        time.sleep(1)
        driver.find_element_by_id('complexity').click()
        self.assertTrue('Thank you again' in self.driver.page_source)
        time.sleep(1)

    def test_contact_page(self):
        driver.get("http://url.network.com/Home/Contact")
        time.sleep(2)
        driver.find_element_by_id('name').send_keys('name')
        driver.find_element_by_id('ID').send_keys('123456')
        driver.find_element_by_id('email').send_keys('[email protected]')
        driver.find_element_by_id('message').send_keys('Unit testing form')
        driver.find_elements_by_css_selector("button[type='submit']")[0].click()

    def tearDown(self):
        self.driver.close()

if __name__ == "__main__":
    unittest.main()

To run them one by own I add driver=self.driver and driver.get("url.network.com") at the top of the function

Solution

I also had the same problem , I understood that you haven’t started a Marionette session before trying to speak to the port. @After(annotation), If you are using this annotation and driver is closed and Marionette/Gecko is not able to initiate again.Solution:Remove driver .close(); after each test case option. 1)for individual test case the driver is started and closed 2)To run other test case the driver should start again running but gecko is failed to initialize for the second test case, so remove driver.close after end of each test case. Here in your case:

def tearDown(self):
        self.driver.close() 

can not be end of each test case, you can use at the end of last test case