1# 2012 October 13 2# 3# The author disclaims copyright to this source code. In place of 4# a legal notice, here is a blessing: 5# 6# May you do good and not evil. 7# May you find forgiveness for yourself and forgive others. 8# May you share freely, never taking more than you give. 9# 10#*********************************************************************** 11# 12# The tests in this file verify that if an empty database (zero bytes in 13# size) is used as the source of a backup operation, the final destination 14# database is one page in size. 15# 16# The destination must consist of at least one page as truncating a 17# database file to zero bytes is equivalent to resetting the database 18# schema cookie and change counter. Doing that could cause other clients 19# to become confused and continue using out-of-date cache data. 20# 21 22set testdir [file dirname $argv0] 23source $testdir/tester.tcl 24set testprefix backup4 25 26# The codec logic does not work for zero-length database files. A database 27# file must contain at least one page in order to be recognized as an 28# encrypted database. 29do_not_use_codec 30 31#------------------------------------------------------------------------- 32# At one point this test was failing because [db] was using an out of 33# date schema in test case 1.2. 34# 35do_execsql_test 1.0 { 36 CREATE TABLE t1(x, y, UNIQUE(x, y)); 37 INSERT INTO t1 VALUES('one', 'two'); 38 SELECT * FROM t1 WHERE x='one'; 39 PRAGMA integrity_check; 40} {one two ok} 41 42do_test 1.1 { 43 sqlite3 db1 :memory: 44 db1 backup test.db 45 sqlite3 db1 test.db 46 db1 eval { 47 CREATE TABLE t1(x, y); 48 INSERT INTO t1 VALUES('one', 'two'); 49 } 50 db1 close 51} {} 52 53do_execsql_test 1.2 { 54 SELECT * FROM t1 WHERE x='one'; 55 PRAGMA integrity_check; 56} {one two ok} 57 58db close 59forcedelete test.db 60forcedelete test.db2 61sqlite3 db test.db 62 63#------------------------------------------------------------------------- 64# Test that if the source is zero bytes, the destination database 65# consists of a single page only. 66# 67do_execsql_test 2.1 { 68 CREATE TABLE t1(a, b); 69 CREATE INDEX i1 ON t1(a, b); 70} 71do_test 2.2 { file size test.db } [expr $AUTOVACUUM ? 4096 : 3072] 72 73do_test 2.3 { 74 sqlite3 db1 test.db2 75 db1 backup test.db 76 db1 close 77 file size test.db 78} {1024} 79 80do_test 2.4 { file size test.db2 } 0 81 82db close 83forcedelete test.db 84forcedelete test.db2 85sqlite3 db test.db 86 87#------------------------------------------------------------------------- 88# Test that if the destination has a page-size larger than the implicit 89# page-size of the source, the final destination database still consists 90# of a single page. 91# 92do_execsql_test 3.1 { 93 PRAGMA page_size = 4096; 94 CREATE TABLE t1(a, b); 95 CREATE INDEX i1 ON t1(a, b); 96} 97do_test 3.2 { file size test.db } [expr $AUTOVACUUM ? 16384 : 12288] 98 99do_test 3.3 { 100 sqlite3 db1 test.db2 101 db1 backup test.db 102 db1 close 103 file size test.db 104} {1024} 105 106do_test 3.4 { file size test.db2 } 0 107 108finish_test 109