proc generate_cmd_on_list_key {key} {
    set op [randomInt 7]
    set small_signed_count [expr 5-[randomInt 10]]
    if {[randomInt 2] == 0} {
        set ele [randomInt 1000]
    } else {
        set ele [string repeat x [randomInt 10000]][randomInt 1000]
    }
    switch $op {
        0 {return "lpush $key $ele"}
        1 {return "rpush $key $ele"}
        2 {return "lpop $key"}
        3 {return "rpop $key"}
        4 {
            return "lset $key $small_signed_count $ele"
        }
        5 {
            set otherele [randomInt 1000]
            if {[randomInt 2] == 0} {
                set where before
            } else {
                set where after
            }
            return "linsert $key $where $otherele $ele"
        }
        6 {
            set otherele ""
            catch {
                set index [randomInt [r llen $key]]
                set otherele [r lindex $key $index]
            }
            return "lrem $key 1 $otherele"
        }
    }
}

start_server {
    tags {"list ziplist"}
    overrides {
        "list-max-ziplist-size" 16
    }
} {
    test {Explicit regression for a list bug} {
        set mylist {49376042582 {BkG2o\pIC]4YYJa9cJ4GWZalG[4tin;1D2whSkCOW`mX;SFXGyS8sedcff3fQI^tgPCC@^Nu1J6o]meM@Lko]t_jRyo<xSJ1oObDYd`ppZuW6P@fS278YaOx=s6lvdFlMbP0[SbkI^Kr\HBXtuFaA^mDx:yzS4a[skiiPWhT<nNfAf=aQVfclcuwDrfe;iVuKdNvB9kbfq>tK?tH[\EvWqS]b`o2OCtjg:?nUTwdjpcUm]y:pg5q24q7LlCOwQE^}}
        r del l
        r rpush l [lindex $mylist 0]
        r rpush l [lindex $mylist 1]
        assert_equal [r lindex l 0] [lindex $mylist 0]
        assert_equal [r lindex l 1] [lindex $mylist 1]
    }

    test {Regression for quicklist #3343 bug} {
        r del mylist
        r lpush mylist 401
        r lpush mylist 392
        r rpush mylist [string repeat x 5105]"799"
        r lset mylist -1 [string repeat x 1014]"702"
        r lpop mylist
        r lset mylist -1 [string repeat x 4149]"852"
        r linsert mylist before 401 [string repeat x 9927]"12"
        r lrange mylist 0 -1
        r ping ; # It's enough if the server is still alive
    } {PONG}

    test {Check compression with recompress} {
        r del key
        config_set list-compress-depth 1
        config_set list-max-ziplist-size 16
        r rpush key a
        r rpush key [string repeat b 50000]
        r rpush key c
        r lset key 1 d
        r rpop key
        r rpush key [string repeat e 5000]
        r linsert key before f 1
        r rpush key g
        r ping
    }

    test {Crash due to wrongly recompress after lrem} {
        r del key
        config_set list-compress-depth 2
        r lpush key a
        r lpush key [string repeat a 5000]
        r lpush key [string repeat b 5000]
        r lpush key [string repeat c 5000]
        r rpush key [string repeat x 10000]"969"
        r rpush key b
        r lrem key 1 a
        r rpop key 
        r lrem key 1 [string repeat x 10000]"969"
        r rpush key crash
        r ping
    }

    test {LINSERT correctly recompress full quicklistNode after inserting a element before it} {
        r del key
        config_set list-compress-depth 1
        r rpush key b
        r rpush key c
        r lset key -1 [string repeat x 8192]"969"
        r lpush key a
        r rpush key d
        r linsert key before b f
        r rpop key
        r ping
    }

    test {LINSERT correctly recompress full quicklistNode after inserting a element after it} {
        r del key
        config_set list-compress-depth 1
        r rpush key b
        r rpush key c
        r lset key 0 [string repeat x 8192]"969"
        r lpush key a
        r rpush key d
        r linsert key after c f
        r lpop key
        r ping
    }

foreach comp {2 1 0} {
    set cycles 1000
    if {$::accurate} { set cycles 10000 }
    config_set list-compress-depth $comp
    
    test "Stress tester for #3343-alike bugs comp: $comp" {
        r del key
        set sent {}
        for {set j 0} {$j < $cycles} {incr j} {
            catch {
                set cmd [generate_cmd_on_list_key key]
                lappend sent $cmd

                # execute the command, we expect commands to fail on syntax errors
                r {*}$cmd
            }
        }

        set print_commands false
        set crash false
        if {[catch {r ping}]} {
            puts "Server crashed"
            set print_commands true
            set crash true
        }

        if {!$::external} {
            # check valgrind and asan report for invalid reads after execute
            # command so that we have a report that is easier to reproduce
            set valgrind_errors [find_valgrind_errors [srv 0 stderr] false]
            set asan_errors [sanitizer_errors_from_file [srv 0 stderr]]
            if {$valgrind_errors != "" || $asan_errors != ""} {
                puts "valgrind or asan found an issue"
                set print_commands true
            }
        }

        if {$print_commands} {
            puts "violating commands:"
            foreach cmd $sent {
                puts $cmd
            }
        }

        assert_equal $crash false
    }
} ;# foreach comp

    tags {slow} {
        test {ziplist implementation: value encoding and backlink} {
            if {$::accurate} {set iterations 100} else {set iterations 10}
            for {set j 0} {$j < $iterations} {incr j} {
                r del l
                set l {}
                for {set i 0} {$i < 200} {incr i} {
                    randpath {
                        set data [string repeat x [randomInt 100000]]
                    } {
                        set data [randomInt 65536]
                    } {
                        set data [randomInt 4294967296]
                    } {
                        set data [randomInt 18446744073709551616]
                    } {
                        set data -[randomInt 65536]
                        if {$data eq {-0}} {set data 0}
                    } {
                        set data -[randomInt 4294967296]
                        if {$data eq {-0}} {set data 0}
                    } {
                        set data -[randomInt 18446744073709551616]
                        if {$data eq {-0}} {set data 0}
                    }
                    lappend l $data
                    r rpush l $data
                }
                assert_equal [llength $l] [r llen l]
                # Traverse backward
                for {set i 199} {$i >= 0} {incr i -1} {
                    if {[lindex $l $i] ne [r lindex l $i]} {
                        assert_equal [lindex $l $i] [r lindex l $i]
                    }
                }
            }
        }

        test {ziplist implementation: encoding stress testing} {
            for {set j 0} {$j < 200} {incr j} {
                r del l
                set l {}
                set len [randomInt 400]
                for {set i 0} {$i < $len} {incr i} {
                    set rv [randomValue]
                    randpath {
                        lappend l $rv
                        r rpush l $rv
                    } {
                        set l [concat [list $rv] $l]
                        r lpush l $rv
                    }
                }
                assert_equal [llength $l] [r llen l]
                for {set i 0} {$i < $len} {incr i} {
                    if {[lindex $l $i] ne [r lindex l $i]} {
                        assert_equal [lindex $l $i] [r lindex l $i]
                    }
                }
            }
        }
    }
}