tests: ported ngx_http_lua test cases for TCP cosockets keepalive when worker process shuts down.

Author: thibaultcha

t/157-socket-keepalive-hup.t

@@ -0,0 +1,80 @@
+# vim:set ft= ts=4 sw=4 et fdm=marker:
+
+our $SkipReason;
+
+BEGIN {
+    if ($ENV{TEST_NGINX_CHECK_LEAK}) {
+        $SkipReason = "unavailable for the hup tests";
+
+    } else {
+        $ENV{TEST_NGINX_USE_HUP} = 1;
+        undef $ENV{TEST_NGINX_USE_STAP};
+    }
+}
+
+use Test::Nginx::Socket::Lua::Stream $SkipReason ? (skip_all => $SkipReason) : ();
+
+repeat_each(2);
+
+plan tests => repeat_each() * (blocks() * 8);
+
+worker_connections(1024);
+no_long_string();
+run_tests();
+
+__DATA__
+
+=== TEST 1: exiting
+--- stream_server_config
+    content_by_lua_block {
+        local f, err = io.open("t/servroot/logs/nginx.pid", "r")
+        if not f then
+            ngx.say("failed to open nginx.pid: ", err)
+            return
+        end
+
+        local pid = f:read()
+        -- ngx.say("master pid: [", pid, "]")
+
+        f:close()
+
+        local i = 0
+
+        local function f(premature)
+            print("timer prematurely expired: ", premature)
+
+            local sock = ngx.socket.tcp()
+
+            local ok, err = sock:connect("127.0.0.1", $TEST_NGINX_SERVER_PORT)
+            if not ok then
+                print("failed to connect: ", err)
+                return
+            end
+
+            local ok, err = sock:setkeepalive()
+            if not ok then
+                print("failed to setkeepalive: ", err)
+                return
+            end
+
+            print("setkeepalive successfully")
+        end
+        local ok, err = ngx.timer.at(3, f)
+        if not ok then
+            ngx.say("failed to set timer: ", err)
+            return
+        end
+        ngx.say("registered timer")
+        os.execute("kill -HUP " .. pid)
+    }
+--- stream_response
+registered timer
+--- wait: 0.3
+--- no_error_log
+[error]
+[alert]
+[crit]
+--- error_log
+timer prematurely expired: true
+setkeepalive successfully
+lua tcp socket set keepalive while process exiting, closing connection