tests: cleanup test code

- remove unused imports in test cases
- fix code smells and code style in conftest.py

test/test_ssl/test_cert_selection.py

@@ -1,4 +1,5 @@
 import json
+
 import pytest
 
 

test/test_ssl/test_hsts.py

@@ -1,6 +1,3 @@
-import pytest
-
-
 def test_web1_HSTS_default(docker_compose, nginxproxy):
     r = nginxproxy.get("https://web1.nginx-proxy.tld/port", allow_redirects=False)
     assert "answer from port 81\n" in r.text

test/test_ssl/test_https_port.py

@@ -1,5 +1,6 @@
 import pytest
 
+
 @pytest.mark.parametrize("subdomain", ["foo", "bar"])
 def test_web1_http_redirects_to_https(docker_compose, nginxproxy, subdomain):
     r = nginxproxy.get("http://%s.nginx-proxy.tld:8080/" % subdomain, allow_redirects=False)

test/test_ssl/test_nohttp.py

@@ -1,7 +1,3 @@
-import pytest
-import requests
-
-
 def test_web2_http_is_connection_refused(docker_compose, nginxproxy):
     r = nginxproxy.get("http://web2.nginx-proxy.tld/", allow_redirects=False)
     assert r.status_code == 503

test/test_ssl/test_nohttps.py

@@ -1,6 +1,7 @@
 import pytest
 from requests import ConnectionError
 
+
 def test_http_is_forwarded(docker_compose, nginxproxy):
     r = nginxproxy.get("http://web.nginx-proxy.tld/port", allow_redirects=False)
     assert r.status_code == 200

test/test_ssl/test_noredirect.py

@@ -1,6 +1,3 @@
-import pytest
-
-
 def test_web3_http_is_forwarded(docker_compose, nginxproxy):
     r = nginxproxy.get("http://web3.nginx-proxy.tld/port", allow_redirects=False)
     assert r.status_code == 200

test/test_ssl/test_virtual_path.py

@@ -1,6 +1,7 @@
 import pytest
 from requests import ConnectionError
 
+
 @pytest.mark.parametrize("path", ["web1", "web2"])
 def test_web1_http_redirects_to_https(docker_compose, nginxproxy, path):
     r = nginxproxy.get("http://www.nginx-proxy.tld/%s/port" % path, allow_redirects=False)