[add] cgiスクリプトでプリントされたConnectionが適用されているかのテスト追加

root/cgi-bin/print_ok_close.pl

@@ -0,0 +1,8 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+
+print "Connection: close\r\n";
+print "Content-Type: text/plain\r\n\r\n";
+print "OK\n"

root/cgi-bin/print_ok_keep.pl

@@ -0,0 +1,8 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+
+print "Connection: keep-alive\r\n";
+print "Content-Type: text/plain\r\n\r\n";
+print "OK\n"

test/webserv/integration/test_cgi.py

@@ -63,6 +63,33 @@ def test_print_ok_pl_keep(self):
         except HTTPException as e:
             self.fail(f"Request failed: {e}")
 
+    # CgiResponseの中のConnectionヘッダーが適用されているか
+    def test_print_ok_close_pl(self):
+        try:
+            self.con.request(
+                "GET",
+                "/cgi-bin/print_ok_close.pl",
+                headers={"Connection": "keep-alive"},
+            )
+            response = self.con.getresponse()
+            assert_status_line(response, HTTPStatus.OK)
+            assert_header(response, "Connection", "close")
+            self.assertEqual(response.read(), b"OK\n")
+        except HTTPException as e:
+            self.fail(f"Request failed: {e}")
+
+    def test_print_ok_keep_pl(self):
+        try:
+            self.con.request(
+                "GET", "/cgi-bin/print_ok_keep.pl", headers={"Connection": "close"}
+            )
+            response = self.con.getresponse()
+            assert_status_line(response, HTTPStatus.OK)
+            assert_header(response, "Connection", "keep-alive")
+            self.assertEqual(response.read(), b"OK\n")
+        except HTTPException as e:
+            self.fail(f"Request failed: {e}")
+
     def test_print_env_pl(self):
         try:
             self.con.request("GET", "/cgi-bin/print_env.pl")