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# 2007 April 24
#
# 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.
#
# This file implements tests to make sure SQLite treats a database
# as readonly if its write version is set to high.
#
# $Id: rdonly.test,v 1.2 2008/07/08 10:19:58 danielk1977 Exp $
set testdir [file dirname $argv0]
source $testdir/tester.tcl
# Do not use a codec for tests in this file, as the database file is
# manipulated directly using tcl scripts (using the [hexio_write] command).
#
do_not_use_codec
# Create a database.
#
do_test rdonly-1.1 {
execsql {
CREATE TABLE t1(x);
INSERT INTO t1 VALUES(1);
SELECT * FROM t1;
}
} {1}
# EVIDENCE-OF: R-29639-16887 The sqlite3_db_readonly(D,N) interface
# returns 1 if the database N of connection D is read-only, 0 if it is
# read/write, or -1 if N is not the name of a database on connection D.
#
do_test rdonly-1.1.1 {
sqlite3_db_readonly db main
} {0}
# Changes the write version from 1 to 3. Verify that the database
# can be read but not written.
#
do_test rdonly-1.2 {
db close
hexio_get_int [hexio_read test.db 18 1]
} 1
do_test rdonly-1.3 {
hexio_write test.db 18 03
sqlite3 db test.db
execsql {
SELECT * FROM t1;
}
} {1}
do_test rdonly-1.3.1 {
sqlite3_db_readonly db main
} {1}
do_test rdonly-1.4 {
catchsql {
INSERT INTO t1 VALUES(2)
}
} {1 {attempt to write a readonly database}}
# Change the write version back to 1. Verify that the database
# is read-write again.
#
do_test rdonly-1.5 {
db close
hexio_write test.db 18 01
sqlite3 db test.db
catchsql {
INSERT INTO t1 VALUES(2);
SELECT * FROM t1;
}
} {0 {1 2}}
# Now, after connection [db] has loaded the database schema, modify the
# write-version of the file (and the change-counter, so that the
# write-version is reloaded). This way, SQLite does not discover that
# the database is read-only until after it is locked.
#
set ro_version 02
ifcapable wal { set ro_version 03 }
do_test rdonly-1.6 {
hexio_write test.db 18 $ro_version ; # write-version
hexio_write test.db 24 11223344 ; # change-counter
catchsql {
INSERT INTO t1 VALUES(2);
}
} {1 {attempt to write a readonly database}}
finish_test
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