[py] need to log both stdout and stderr from selenium manager

Author: titusfortner

py/selenium/webdriver/common/selenium_manager.py

@@ -90,7 +90,7 @@ def run(args: Tuple[str, str, str]) -> str:
         stdout = completed_proc.stdout.decode("utf-8").rstrip("\n")
         stderr = completed_proc.stderr.decode("utf-8").rstrip("\n")
         if completed_proc.returncode:
-            raise SeleniumManagerException(f"Selenium manager failed for: {command}. {stderr}")
+            raise SeleniumManagerException(f"Selenium manager failed for: {command}.\n{stdout}{stderr}")
         else:
             # selenium manager exited 0 successfully, parse the executable path from stdout.
             return stdout.split("\t")[-1].strip()

py/test/selenium/webdriver/common/selenium_manager_tests.py

@@ -28,7 +28,7 @@ def test_non_supported_browser_raises_sme():
 
 
 def test_stderr_is_propagated_to_exception_messages():
-    msg = 'Selenium manager failed for.*Error: "Invalid browser/driver name"'
+    msg = 'Selenium manager failed for:.* --browser foo\.\nERROR\tInvalid browser/driver name'
     with pytest.raises(SeleniumManagerException, match=msg):
         manager = SeleniumManager()
         binary = manager.get_binary()