test: tests for HTTP/3

Co-authored-by: Nicolas Duchon <nicolas.duchon@gmail.com>
Co-authored-by: Niek <100143256+SchoNie@users.noreply.github.com>

test/test_http3/test_http3_global_disabled.py

@@ -0,0 +1,19 @@
+import pytest
+import re
+
+    #Python Requests is not able to do native http3 requests. 
+    #We only check for directives which should enable http3.
+
+def test_http3_global_disabled_ALTSVC_header(docker_compose, nginxproxy):
+    r = nginxproxy.get("http://http3-global-disabled.nginx-proxy.tld/headers")
+    assert r.status_code == 200
+    assert "Host: http3-global-disabled.nginx-proxy.tld" in r.text
+    assert not "alt-svc" in r.headers
+
+def test_http3_global_disabled_config(docker_compose, nginxproxy):
+    conf = nginxproxy.get_conf().decode('ASCII')
+    r = nginxproxy.get("http://http3-global-disabled.nginx-proxy.tld")
+    assert r.status_code == 200
+    assert not re.search(r"(?s)listen 443 quic", conf)
+    assert not re.search(r"(?s)http3 on", conf)
+    assert not re.search(r"(?s)add_header alt-svc \'h3=\":443\"; ma=86400;\'", conf)