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 Doing that could cause other clients 19# to become confused and continue using out-of-date cache data. 20# 21 22set testdir [file dirname $argv0] 23source $testdir/tester.tcl 24set testprefix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#------------------------------------------------------------------------- 27# At one point this test was failing because [db] was using an out of 28# date schema in test case 1.2. 29# 30do_execsql_test 1.0 { 31 CREATE TABLE t1(x, y, UNIQUE(x, y)); 32 INSERT INTO t1 VALUES('one', 'two'); 33 SELECT * FROM t1 WHERE x='one'; 34 PRAGMA integrity_check; 35} {one two ok} 36 37do_test 1.1 { 38 sqlite3 db1 :memory: 39 db1 backup test.db 40 sqlite3 db1 test.db 41 db1 eval { 42 CREATE TABLE t1(x, y); 43 INSERT INTO t1 VALUES('one', 'two'); 44 } 45 db1 close 46} {} 47 48do_execsql_test 1.2 { 49 SELECT * FROM t1 WHERE x='one'; 50 PRAGMA integrity_check; 51} {one two ok} 52 53db close 54forcedelete test.db 55forcedelete test.db2 56sqlite3 db test.db 57 58#------------------------------------------------------------------------- 59# Test that if the source is zero bytes, the destination database 60# consists of a single page only. 61# 62do_execsql_test 2.1 { 63 CREATE TABLE t1(a, b); 64 CREATE INDEX i1 ON t1(a, b); 65} 66do_test 2.2 { file size test.db } [expr $AUTOVACUUM ? 4096 : 3072] 67 68do_test 2.3 { 69 sqlite3 db1 test.db2 70 db1 backup test.db 71 db1 close 72 file size test.db 73} {1024} 74 75do_test 2.4 { file size test.db2 } 0 76 77db close 78forcedelete test.db 79forcedelete test.db2 80sqlite3 db test.db 81 82#------------------------------------------------------------------------- 83# Test that if the destination has a page-size larger than the implicit 84# page-size of the source, the final destination database still consists 85# of a single page. 86# 87do_execsql_test 3.1 { 88 PRAGMA page_size = 4096; 89 CREATE TABLE t1(a, b); 90 CREATE INDEX i1 ON t1(a, b); 91} 92do_test 3.2 { file size test.db } [expr $AUTOVACUUM ? 16384 : 12288] 93 94do_test 3.3 { 95 sqlite3 db1 test.db2 96 db1 backup test.db 97 db1 close 98 file size test.db 99} {1024} 100 101do_test 3.4 { file size test.db2 } 0 102 103finish_test 104