gitlab.com/CoiaPrant/sqlite3@v1.19.1/testdata/tcl/backup4.test (about) 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 Doing that could cause other clients 19 # to become confused and continue using out-of-date cache data. 20 # 21 22 set testdir [file dirname $argv0] 23 source $testdir/tester.tcl 24 set testprefix backup4 25 26 # The codec logic does not work for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. 29 do_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 # 35 do_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 42 do_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 53 do_execsql_test 1.2 { 54 SELECT * FROM t1 WHERE x='one'; 55 PRAGMA integrity_check; 56 } {one two ok} 57 58 db close 59 forcedelete test.db 60 forcedelete test.db2 61 sqlite3 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 # 67 do_execsql_test 2.1 { 68 CREATE TABLE t1(a, b); 69 CREATE INDEX i1 ON t1(a, b); 70 } 71 do_test 2.2 { file size test.db } [expr $AUTOVACUUM ? 4096 : 3072] 72 73 do_test 2.3 { 74 sqlite3 db1 test.db2 75 db1 backup test.db 76 db1 close 77 file size test.db 78 } {1024} 79 80 do_test 2.4 { file size test.db2 } 0 81 82 db close 83 forcedelete test.db 84 forcedelete test.db2 85 sqlite3 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 # 92 do_execsql_test 3.1 { 93 PRAGMA page_size = 4096; 94 CREATE TABLE t1(a, b); 95 CREATE INDEX i1 ON t1(a, b); 96 } 97 do_test 3.2 { file size test.db } [expr $AUTOVACUUM ? 16384 : 12288] 98 99 do_test 3.3 { 100 sqlite3 db1 test.db2 101 db1 backup test.db 102 db1 close 103 file size test.db 104 } {1024} 105 106 do_test 3.4 { file size test.db2 } 0 107 108 finish_test