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109 lines
2.8 KiB
Plaintext
109 lines
2.8 KiB
Plaintext
# 2012 October 13
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#
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# The author disclaims copyright to this source code. In place of
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# a legal notice, here is a blessing:
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#
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# May you do good and not evil.
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# May you find forgiveness for yourself and forgive others.
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# May you share freely, never taking more than you give.
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#
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#***********************************************************************
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#
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# The tests in this file verify that if an empty database (zero bytes in
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# size) is used as the source of a backup operation, the final destination
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# database is one page in size.
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#
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# The destination must consist of at least one page as truncating a
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# database file to zero bytes is equivalent to resetting the database
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# schema cookie and change counter. Doing that could cause other clients
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# to become confused and continue using out-of-date cache data.
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#
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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set testprefix backup4
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# The codec logic does not work for zero-length database files. A database
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# file must contain at least one page in order to be recognized as an
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# encrypted database.
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do_not_use_codec
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#-------------------------------------------------------------------------
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# At one point this test was failing because [db] was using an out of
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# date schema in test case 1.2.
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#
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do_execsql_test 1.0 {
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CREATE TABLE t1(x, y, UNIQUE(x, y));
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INSERT INTO t1 VALUES('one', 'two');
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SELECT * FROM t1 WHERE x='one';
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PRAGMA integrity_check;
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} {one two ok}
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do_test 1.1 {
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sqlite3 db1 :memory:
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db1 backup test.db
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sqlite3 db1 test.db
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db1 eval {
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CREATE TABLE t1(x, y);
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INSERT INTO t1 VALUES('one', 'two');
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}
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db1 close
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} {}
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do_execsql_test 1.2 {
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SELECT * FROM t1 WHERE x='one';
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PRAGMA integrity_check;
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} {one two ok}
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db close
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forcedelete test.db
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forcedelete test.db2
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sqlite3 db test.db
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#-------------------------------------------------------------------------
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# Test that if the source is zero bytes, the destination database
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# consists of a single page only.
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#
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do_execsql_test 2.1 {
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CREATE TABLE t1(a, b);
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CREATE INDEX i1 ON t1(a, b);
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}
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do_test 2.2 { file size test.db } [expr $AUTOVACUUM ? 4096 : 3072]
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do_test 2.3 {
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sqlite3 db1 test.db2
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db1 backup test.db
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db1 close
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file size test.db
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} {1024}
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do_test 2.4 { file size test.db2 } 0
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db close
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forcedelete test.db
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forcedelete test.db2
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sqlite3 db test.db
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#-------------------------------------------------------------------------
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# Test that if the destination has a page-size larger than the implicit
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# page-size of the source, the final destination database still consists
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# of a single page.
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#
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do_execsql_test 3.1 {
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PRAGMA page_size = 4096;
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CREATE TABLE t1(a, b);
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CREATE INDEX i1 ON t1(a, b);
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}
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do_test 3.2 { file size test.db } [expr $AUTOVACUUM ? 16384 : 12288]
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do_test 3.3 {
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sqlite3 db1 test.db2
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db1 backup test.db
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db1 close
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file size test.db
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} {1024}
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do_test 3.4 { file size test.db2 } 0
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finish_test
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