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211 lines
6.5 KiB
Plaintext
211 lines
6.5 KiB
Plaintext
# 2014 May 6.
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#
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# The author disclaims copyright to this source code. In place of
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# a legal notice, here is a blessing:
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#
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# May you do good and not evil.
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# May you find forgiveness for yourself and forgive others.
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# May you share freely, never taking more than you give.
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#
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#***********************************************************************
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# TESTRUNNER: superslow
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#
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# This file implements regression tests for SQLite library.
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#
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# The tests in this file are brute force tests of the multi-threaded
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# sorter.
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#
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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set testprefix sort4
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db close
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sqlite3_shutdown
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sqlite3_config_pmasz 10
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sqlite3_initialize
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sqlite3 db test.db
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# Configure the sorter to use 3 background threads.
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#
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# EVIDENCE-OF: R-19249-32353 SQLITE_LIMIT_WORKER_THREADS The maximum
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# number of auxiliary worker threads that a single prepared statement
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# may start.
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#
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do_test sort4-init001 {
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db eval {PRAGMA threads=5}
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sqlite3_limit db SQLITE_LIMIT_WORKER_THREADS -1
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} {5}
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do_test sort4-init002 {
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sqlite3_limit db SQLITE_LIMIT_WORKER_THREADS 3
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db eval {PRAGMA threads}
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} {3}
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# Minimum number of seconds to run for. If the value is 0, each test
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# is run exactly once. Otherwise, tests are repeated until the timeout
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# expires.
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set SORT4TIMEOUT 0
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if {[permutation] == "multithread"} { set SORT4TIMEOUT 300 }
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#--------------------------------------------------------------------
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# Set up a table "t1" containing $nRow rows. Each row contains also
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# contains blob fields that collectively contain at least $nPayload
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# bytes of content. The table schema is as follows:
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#
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# CREATE TABLE t1(a INTEGER, <extra-columns>, b INTEGER);
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#
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# For each row, the values of columns "a" and "b" are set to the same
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# pseudo-randomly selected integer. The "extra-columns", of which there
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# are at most eight, are named c0, c1, c2 etc. Column c0 contains a 4
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# byte string. Column c1 an 8 byte string. Field c2 16 bytes, and so on.
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#
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# This table is intended to be used for testing queries of the form:
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#
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# SELECT a, <cols>, b FROM t1 ORDER BY a;
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#
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# The test code checks that rows are returned in order, and that the
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# values of "a" and "b" are the same for each row (the idea being that
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# if field "b" at the end of the sorter record has not been corrupted,
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# the rest of the record is probably Ok as well).
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#
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proc populate_table {nRow nPayload} {
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set nCol 0
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set n 0
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for {set nCol 0} {$n < $nPayload} {incr nCol} {
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incr n [expr (4 << $nCol)]
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}
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set cols [lrange [list xxx c0 c1 c2 c3 c4 c5 c6 c7] 1 $nCol]
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set data [lrange [list xxx \
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randomblob(4) randomblob(8) randomblob(16) randomblob(32) \
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randomblob(64) randomblob(128) randomblob(256) randomblob(512) \
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] 1 $nCol]
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execsql { DROP TABLE IF EXISTS t1 }
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db transaction {
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execsql "CREATE TABLE t1(a, [join $cols ,], b);"
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set insert "INSERT INTO t1 VALUES(:k, [join $data ,], :k)"
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for {set i 0} {$i < $nRow} {incr i} {
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set k [expr int(rand()*1000000000)]
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execsql $insert
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}
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}
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}
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# Helper for [do_sorter_test]
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#
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proc sorter_test {nRow nRead nPayload} {
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set res [list]
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set nLoad [expr ($nRow > $nRead) ? $nRead : $nRow]
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set nPayload [expr (($nPayload+3)/4) * 4]
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set cols [list]
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foreach {mask col} {
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0x04 c0 0x08 c1 0x10 c2 0x20 c3
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0x40 c4 0x80 c5 0x100 c6 0x200 c7
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} {
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if {$nPayload & $mask} { lappend cols $col }
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}
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# Create two SELECT statements. Statement $sql1 uses the sorter to sort
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# $nRow records of a bit over $nPayload bytes each read from the "t1"
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# table created by [populate_table] proc above. Rows are sorted in order
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# of the integer field in each "t1" record.
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#
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# The second SQL statement sorts the same set of rows as the first, but
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# uses a LIMIT clause, causing SQLite to use a temp table instead of the
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# sorter for sorting.
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#
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set sql1 "SELECT a, [join $cols ,], b FROM t1 WHERE rowid<=$nRow ORDER BY a"
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set sql2 "SELECT a FROM t1 WHERE rowid<=$nRow ORDER BY a LIMIT $nRead"
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# Pass the two SQL statements to a helper command written in C. This
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# command steps statement $sql1 $nRead times and compares the integer
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# values in the rows returned with the results of executing $sql2. If
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# the comparison fails (indicating some bug in the sorter), a Tcl
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# exception is thrown.
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#
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sorter_test_sort4_helper db $sql1 $nRead $sql2
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set {} {}
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}
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# Usage:
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#
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# do_sorter_test <testname> <args>...
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#
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# where <args> are any of the following switches:
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#
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# -rows N (number of rows to have sorter sort)
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# -read N (number of rows to read out of sorter)
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# -payload N (bytes of payload to read with each row)
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# -cachesize N (Value for "PRAGMA cache_size = ?")
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# -repeats N (number of times to repeat test)
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# -fakeheap BOOL (true to use separate allocations for in-memory records)
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#
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proc do_sorter_test {tn args} {
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set a(-rows) 1000
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set a(-repeats) 1
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set a(-read) 100
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set a(-payload) 100
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set a(-cachesize) 100
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set a(-fakeheap) 0
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foreach {s val} $args {
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if {[info exists a($s)]==0} {
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unset a(-cachesize)
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set optlist "[join [array names a] ,] or -cachesize"
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error "Unknown option $s, expected $optlist"
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}
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set a($s) $val
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}
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if {[permutation] == "memsys3" || [permutation] == "memsys5"} {
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set a(-fakeheap) 0
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}
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if {$a(-fakeheap)} { sorter_test_fakeheap 1 }
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db eval "PRAGMA cache_size = $a(-cachesize)"
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do_test $tn [subst -nocommands {
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for {set i 0} {[set i] < $a(-repeats)} {incr i} {
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sorter_test $a(-rows) $a(-read) $a(-payload)
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}
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}] {}
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if {$a(-fakeheap)} { sorter_test_fakeheap 0 }
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}
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proc clock_seconds {} {
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db one {SELECT strftime('%s')}
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}
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#-------------------------------------------------------------------------
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# Begin tests here.
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# Create a test database.
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do_test 1 {
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execsql "PRAGMA page_size = 4096"
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populate_table 100000 500
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} {}
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set iTimeLimit [expr [clock_seconds] + $SORT4TIMEOUT]
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for {set t 2} {1} {incr tn} {
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do_sorter_test $t.2 -repeats 10 -rows 1000 -read 100
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do_sorter_test $t.3 -repeats 10 -rows 100000 -read 1000
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do_sorter_test $t.4 -repeats 10 -rows 100000 -read 1000 -payload 500
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do_sorter_test $t.5 -repeats 10 -rows 100000 -read 100000 -payload 8
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do_sorter_test $t.6 -repeats 10 -rows 100000 -read 10 -payload 8
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do_sorter_test $t.7 -repeats 10 -rows 10000 -read 10000 -payload 8 -fakeheap 1
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do_sorter_test $t.8 -repeats 10 -rows 100000 -read 10000 -cachesize 250
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set iNow [clock_seconds]
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if {$iNow>=$iTimeLimit} break
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do_test "$testprefix-([expr $iTimeLimit-$iNow] seconds remain)" {} {}
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}
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finish_test
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