Added regression test to ensure HSTS works for errors

test/test_ssl/test_hsts.py

@@ -7,6 +7,13 @@ def test_web1_HSTS_default(docker_compose, nginxproxy):
     assert "Strict-Transport-Security" in r.headers
     assert "max-age=31536000" == r.headers["Strict-Transport-Security"]
 
+# Regression test to ensure HSTS is enabled even when the upstream sends an error in response
+# Issue #1073 https://github.com/jwilder/nginx-proxy/pull/1073
+def test_web1_HSTS_error(docker_compose, nginxproxy):
+    r = nginxproxy.get("https://web1.nginx-proxy.tld/status/500", allow_redirects=False)
+    assert "Strict-Transport-Security" in r.headers
+    assert "max-age=31536000" == r.headers["Strict-Transport-Security"]
+
 def test_web2_HSTS_off(docker_compose, nginxproxy):
     r = nginxproxy.get("https://web2.nginx-proxy.tld/port", allow_redirects=False)
     assert "answer from port 81\n" in r.text