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# 2009 August 20
#
# 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.
#
#***********************************************************************
# This file implements regression tests for SQLite library.
#
# This file implements tests to verify that ticket #4018 has been
# fixed.
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
proc testsql {sql} {
set fd [open tf_main.tcl w]
puts $fd [subst -nocommands {
sqlite3_test_control_pending_byte 0x0010000
sqlite3 db test.db
set rc [catch { db eval {$sql} } msg]
puts -nonewline "[set rc] {[set msg]}"
flush stdout
exit
}]
close $fd
set fd [open "| [info nameofexec] ./tf_main.tcl" r]
set res [read $fd]
close $fd
return $res
}
do_test tkt4018-1.1 {
execsql {
CREATE TABLE t1(a, b);
BEGIN;
SELECT * FROM t1;
}
} {}
# The database is locked by connection [db]. Open and close a second
# connection to test.db 10000 times. If file-descriptors are not being
# reused, then the process will quickly exceed its maximum number of
# file descriptors (1024 by default on linux).
do_test tkt4018-1.2 {
for {set i 0} {$i < 10000} {incr i} {
sqlite3 db2 test.db
db2 close
}
} {}
# Now check that connection [db] is still holding a SHARED lock by
# having a second process try to write the db.
do_test tkt4018-1.3 {
testsql {INSERT INTO t1 VALUES(3, 4)}
} {1 {database is locked}}
# Sanity checking. Have [db] release the lock and then retry the
# INSERT from the previous test case.
do_test tkt4018-1.4 {
db eval COMMIT
testsql {INSERT INTO t1 VALUES(3, 4)}
} {0 {}}
# Check that reusing a file descriptor cannot change a read-only
# connection into a read-write connection.
do_test tkt4018-2.1 {
sqlite3 db2 test.db
execsql {INSERT INTO t1 VALUES(1, 2)} db2
} {}
do_test tkt4018-2.2 {
execsql {
BEGIN;
SELECT * FROM t1 ORDER BY a;
}
} {1 2 3 4}
do_test tkt4018-2.3 {
db2 close
sqlite3 db2 test.db -readonly 1
execsql COMMIT
catchsql {INSERT INTO t1 VALUES(5, 6)} db2
} {1 {attempt to write a readonly database}}
db2 close
finish_test
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