redis_study/tests/unit/moduleapi/hooks.tcl

set testmodule [file normalize tests/modules/hooks.so]

tags "modules" {
    start_server [list overrides [list loadmodule "$testmodule" appendonly yes]] {

        test {Test clients connection / disconnection hooks} {
            for {set j 0} {$j < 2} {incr j} {
                set rd1 [redis_deferring_client]
                $rd1 close
            }
            assert {[r hooks.event_count client-connected] > 1}
            assert {[r hooks.event_count client-disconnected] > 1}
        }

        test {Test module cron hook} {
            after 100
            assert {[r hooks.event_count cron-loop] > 0}
            set hz [r hooks.event_last cron-loop]
            assert_equal $hz 10
        }

        test {Test module loaded / unloaded hooks} {
            set othermodule [file normalize tests/modules/infotest.so]
            r module load $othermodule
            r module unload infotest
            assert_equal [r hooks.event_last module-loaded] "infotest"
            assert_equal [r hooks.event_last module-unloaded] "infotest"
        }

        test {Test module aofrw hook} {
            r debug populate 1000 foo 10000 ;# 10mb worth of data
            r config set rdbcompression no ;# rdb progress is only checked once in 2mb
            r BGREWRITEAOF
            waitForBgrewriteaof r
            assert_equal [string match {*module-event-persistence-aof-start*} [exec tail -20 < [srv 0 stdout]]] 1
            assert_equal [string match {*module-event-persistence-end*} [exec tail -20 < [srv 0 stdout]]] 1
        }

        test {Test module aof load and rdb/aof progress hooks} {
            # create some aof tail (progress is checked only once in 1000 commands)
            for {set j 0} {$j < 4000} {incr j} {
                r set "bar$j" x
            }
            # set some configs that will cause many loading progress events during aof loading
            r config set key-load-delay 500
            r config set dynamic-hz no
            r config set hz 500
            r DEBUG LOADAOF
            assert_equal [r hooks.event_last loading-aof-start] 0
            assert_equal [r hooks.event_last loading-end] 0
            assert {[r hooks.event_count loading-rdb-start] == 0}
            assert_lessthan 2 [r hooks.event_count loading-progress-rdb] ;# comes from the preamble section
            assert_lessthan 2 [r hooks.event_count loading-progress-aof]
            if {$::verbose} {
                puts "rdb progress events [r hooks.event_count loading-progress-rdb]"
                puts "aof progress events [r hooks.event_count loading-progress-aof]"
            }
        }
        # undo configs before next test
        r config set dynamic-hz yes
        r config set key-load-delay 0

        test {Test module rdb save hook} {
            # debug reload does: save, flush, load:
            assert {[r hooks.event_count persistence-syncrdb-start] == 0}
            assert {[r hooks.event_count loading-rdb-start] == 0}
            r debug reload
            assert {[r hooks.event_count persistence-syncrdb-start] == 1}
            assert {[r hooks.event_count loading-rdb-start] == 1}
        }

        test {Test flushdb hooks} {
            r flushdb
            assert_equal [r hooks.event_last flush-start] 9
            assert_equal [r hooks.event_last flush-end] 9
            r flushall
            assert_equal [r hooks.event_last flush-start] -1
            assert_equal [r hooks.event_last flush-end] -1
        }

        # replication related tests
        set master [srv 0 client]
        set master_host [srv 0 host]
        set master_port [srv 0 port]
        start_server {} {
            r module load $testmodule
            set replica [srv 0 client]
            set replica_host [srv 0 host]
            set replica_port [srv 0 port]
            $replica replicaof $master_host $master_port

            wait_for_condition 50 100 {
                [string match {*master_link_status:up*} [r info replication]]
            } else {
                fail "Can't turn the instance into a replica"
            }

            test {Test master link up hook} {
                assert_equal [r hooks.event_count masterlink-up] 1
                assert_equal [r hooks.event_count masterlink-down] 0
            }

            test {Test role-replica hook} {
                assert_equal [r hooks.event_count role-replica] 1
                assert_equal [r hooks.event_count role-master] 0
                assert_equal [r hooks.event_last role-replica] [s 0 master_host]
            }

            test {Test replica-online hook} {
                assert_equal [r -1 hooks.event_count replica-online] 1
                assert_equal [r -1 hooks.event_count replica-offline] 0
            }

            test {Test master link down hook} {
                r client kill type master
                assert_equal [r hooks.event_count masterlink-down] 1
            }

            $replica replicaof no one

            test {Test role-master hook} {
                assert_equal [r hooks.event_count role-replica] 1
                assert_equal [r hooks.event_count role-master] 1
                assert_equal [r hooks.event_last role-master] {}
            }

            test {Test replica-offline hook} {
                assert_equal [r -1 hooks.event_count replica-online] 1
                assert_equal [r -1 hooks.event_count replica-offline] 1
            }
            # get the replica stdout, to be used by the next test
            set replica_stdout [srv 0 stdout]
        }


        # look into the log file of the server that just exited
        test {Test shutdown hook} {
            assert_equal [string match {*module-event-shutdown*} [exec tail -5 < $replica_stdout]] 1
        }

    }
}