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# 2021-10-15
#
# 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. The
# focus of this file is testing the sqlite3_autovacuum_pages() interface
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
# If this build of the library does not support auto-vacuum, omit this
# whole file.
ifcapable {!autovacuum || !pragma} {
finish_test
return
}
# Demonstrate basic sqlite3_autovacuum_pages functionality
#
do_execsql_test autovacuum2-1.0 {
PRAGMA page_size=1024;
PRAGMA auto_vacuum=FULL;
CREATE TABLE t1(x);
VACUUM;
INSERT INTO t1(x) VALUES(zeroblob(10000));
PRAGMA page_count;
} {12}
proc autovac_page_callback {schema filesize freesize pagesize} {
global autovac_callback_data
lappend autovac_callback_data $schema $filesize $freesize $pagesize
return [expr {$freesize/2}]
}
sqlite3_autovacuum_pages db autovac_page_callback
set autovac_callback_data {}
do_execsql_test autovacuum2-1.1 {
BEGIN;
DELETE FROM t1;
PRAGMA freelist_count;
PRAGMA page_count;
} {9 12}
do_execsql_test autovacuum2-1.2 {
COMMIT;
} {}
do_test autovacuum2-1.3 {
set autovac_callback_data
} {main 12 9 1024}
do_execsql_test autovacuum2-1.4 {
PRAGMA freelist_count;
PRAGMA page_count;
} {5 8}
do_execsql_test autovacuum2-1.5 {
PRAGMA integrity_check;
} {ok}
# Disable the autovacuum-pages callback. Then do any transaction.
# The database should shrink to minimal size
#
sqlite3_autovacuum_pages db
do_execsql_test autovacuum2-1.10 {
CREATE TABLE t2(x);
PRAGMA freelist_count;
} {0}
# Rig the autovacuum-pages callback to always return zero. No
# autovacuum will happen.
#
proc autovac_page_callback_off {schema filesize freesize pagesize} {
return 0
}
sqlite3_autovacuum_pages db autovac_page_callback_off
do_execsql_test autovacuum2-1.20 {
BEGIN;
INSERT INTO t1(x) VALUES(zeroblob(10000));
DELETE FROM t1;
PRAGMA freelist_count;
COMMIT;
PRAGMA freelist_count;
} {9 9}
finish_test
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