valkey/tests/unit/obuf-limits.tcl

start_server {tags {"obuf-limits"}} {
    test {Client output buffer hard limit is enforced} {
        r config set client-output-buffer-limit {pubsub 100000 0 0}
        set rd1 [redis_deferring_client]

        $rd1 subscribe foo
        set reply [$rd1 read]
        assert {$reply eq "subscribe foo 1"}

        set omem 0
        while 1 {
            r publish foo bar
            set clients [split [r client list] "\r\n"]
            set c [split [lindex $clients 1] " "]
            if {![regexp {omem=([0-9]+)} $c - omem]} break
            if {$omem > 200000} break
        }
        assert {$omem >= 90000 && $omem < 200000}
        $rd1 close
    }

    test {Client output buffer soft limit is not enforced if time is not overreached} {
        r config set client-output-buffer-limit {pubsub 0 100000 10}
        set rd1 [redis_deferring_client]

        $rd1 subscribe foo
        set reply [$rd1 read]
        assert {$reply eq "subscribe foo 1"}

        set omem 0
        set start_time 0
        set time_elapsed 0
        while 1 {
            r publish foo bar
            set clients [split [r client list] "\r\n"]
            set c [split [lindex $clients 1] " "]
            if {![regexp {omem=([0-9]+)} $c - omem]} break
            if {$omem > 100000} {
                if {$start_time == 0} {set start_time [clock seconds]}
                set time_elapsed [expr {[clock seconds]-$start_time}]
                if {$time_elapsed >= 5} break
            }
        }
        assert {$omem >= 100000 && $time_elapsed >= 5 && $time_elapsed <= 10}
        $rd1 close
    }

    test {Client output buffer soft limit is enforced if time is overreached} {
        r config set client-output-buffer-limit {pubsub 0 100000 3}
        set rd1 [redis_deferring_client]

        $rd1 subscribe foo
        set reply [$rd1 read]
        assert {$reply eq "subscribe foo 1"}

        set omem 0
        set start_time 0
        set time_elapsed 0
        while 1 {
            r publish foo bar
            set clients [split [r client list] "\r\n"]
            set c [split [lindex $clients 1] " "]
            if {![regexp {omem=([0-9]+)} $c - omem]} break
            if {$omem > 100000} {
                if {$start_time == 0} {set start_time [clock seconds]}
                set time_elapsed [expr {[clock seconds]-$start_time}]
                if {$time_elapsed >= 10} break
            }
        }
        assert {$omem >= 100000 && $time_elapsed < 6}
        $rd1 close
    }
}