[Toaster] toaster: fix chrome argument syntax and wait for driver exit

[Toaster] toaster: fix chrome argument syntax and wait for driver exit

[alexander.lussier-cullen]

From: Alexander Lussier-Cullen <alexander.lussier-cullen@savoirfairelinux.com>

The chrome driver sometimes fails with a page crash for a full suite
of tests, pointing to a failure in the setup of the driver due to
resource limitations.
To mitigate these crashes, add a wait between driver driven tests to
ensure resources are freed.

Signed-off-by: Alexander Lussier-Cullen <alexander.lussier-cullen@savoirfairelinux.com>
---
 bitbake/lib/toaster/tests/browser/selenium_helpers_base.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/bitbake/lib/toaster/tests/browser/selenium_helpers_base.py b/bitbake/lib/toaster/tests/browser/selenium_helpers_base.py
index 46ced5a167..2c8a778f79 100644
--- a/bitbake/lib/toaster/tests/browser/selenium_helpers_base.py
+++ b/bitbake/lib/toaster/tests/browser/selenium_helpers_base.py
@@ -35,7 +35,7 @@ def create_selenium_driver(cls,browser='chrome'):
 
     if browser == 'chrome':
         options = webdriver.ChromeOptions()
-        options.add_argument('headless')
+        options.add_argument('--headless')
         options.add_argument('--disable-infobars')
         options.add_argument('--disable-dev-shm-usage')
         options.add_argument('--no-sandbox')
@@ -164,6 +164,8 @@ class SeleniumTestCaseBase(unittest.TestCase):
         """ Clean up webdriver driver """
 
         cls.driver.quit()
+        # Allow driver resources to be properly freed before proceeding with further tests
+        time.sleep(5)
         super(SeleniumTestCaseBase, cls).tearDownClass()
 
     def get(self, url):
-- 
2.34.1