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libsql/libsql-sqlite3/ext/fts5/test/fts5corrupt4.test
2023-10-16 13:58:16 +02:00

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# 2019 May 16
#
# The author disclaims copyright to this source code. In place of
# a legal notice, here is a blessing:
#
# May you do good and not evil.
# May you find forgiveness for yourself and forgive others.
# May you share freely, never taking more than you give.
#
#***********************************************************************
#
#
source [file join [file dirname [info script]] fts5_common.tcl]
set testprefix fts5corrupt4
# If SQLITE_ENABLE_FTS5 is defined, omit this file.
ifcapable !fts5 {
finish_test
return
}
sqlite3_fts5_may_be_corrupt 1
do_execsql_test 1.0 {
CREATE VIRTUAL TABLE ttt USING fts5(a, b);
INSERT INTO ttt
VALUES('e ee eee e ee eee e ee eee', 'eee ee e e e ee eee ee ee');
INSERT INTO ttt SELECT a||a, b||b FROM ttt;
INSERT INTO ttt SELECT a||a, b||b FROM ttt;
}
expr srand(1)
proc mutate {blob i} {
set o [expr {$i % [string length $blob]}]
set a [string range $blob 0 $o-1]
set b [string range $blob $o+1 end]
set v [expr int(rand()*255) - 127]
return "$a[binary format c $v]$b"
}
db func mutate mutate
for {set j 1000} {$j <= 5000} {incr j 1000} {
do_test 1.$j {
for {set i 0} {$i < 1000} {incr i} {
execsql {
BEGIN;
UPDATE ttt_data SET block = mutate(block, $i) WHERE id>10;
}
foreach sql {
{SELECT snippet(ttt, -1, '.', '..', '[', ']'), * FROM ttt('e*')}
{SELECT snippet(ttt, -1, '.', '..', '[', ']'), * FROM ttt('e* NOT ee*')}
} {
catch { execsql $sql }
}
execsql ROLLBACK
}
} {}
}
sqlite3_fts5_may_be_corrupt 0
finish_test