139 lines
3.3 KiB
Plaintext
139 lines
3.3 KiB
Plaintext
# 2016 September 23
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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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# This file implements regression tests for SQLite library. The focus
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# of this file is the sqlite3_snapshot_xxx() APIs.
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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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ifcapable !snapshot {finish_test; return}
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set testprefix snapshot3
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# This test does not work with the inmemory_journal permutation. The reason
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# is that each connection opened as part of this permutation executes
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# "PRAGMA journal_mode=memory", which fails if the database is in wal mode
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# and there are one or more existing connections.
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if {[permutation]=="inmemory_journal"} {
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finish_test
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return
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}
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#-------------------------------------------------------------------------
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# This block of tests verifies that it is not possible to wrap the wal
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# file - using a writer or a "PRAGMA wal_checkpoint = TRUNCATE" - while
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# there is an open snapshot transaction (transaction opened using
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# sqlite3_snapshot_open()).
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#
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do_execsql_test 1.0 {
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CREATE TABLE t1(y);
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PRAGMA journal_mode = wal;
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INSERT INTO t1 VALUES(1);
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INSERT INTO t1 VALUES(2);
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INSERT INTO t1 VALUES(3);
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INSERT INTO t1 VALUES(4);
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} {wal}
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do_test 1.1 {
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sqlite3 db2 test.db
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sqlite3 db3 test.db
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execsql {SELECT * FROM sqlite_master} db2
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execsql {SELECT * FROM sqlite_master} db3
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db2 trans { set snap [sqlite3_snapshot_get_blob db2 main] }
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db2 eval { SELECT * FROM t1 }
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} {1 2 3 4}
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do_test 1.2 {
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execsql BEGIN db2
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sqlite3_snapshot_open_blob db2 main $snap
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db2 eval { SELECT * FROM t1 }
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} {1 2 3 4}
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do_test 1.2 {
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execsql END db2
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execsql { PRAGMA wal_checkpoint }
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execsql BEGIN db2
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sqlite3_snapshot_open_blob db2 main $snap
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db2 eval { SELECT * FROM t1 }
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} {1 2 3 4}
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set sz [file size test.db-wal]
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do_test 1.3 {
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execsql { PRAGMA wal_checkpoint = truncate }
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file size test.db-wal
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} $sz
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do_test 1.4 {
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execsql BEGIN db3
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list [catch { sqlite3_snapshot_open_blob db3 main $snap } msg] $msg
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} {0 {}}
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do_test 1.5 {
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db3 eval { SELECT * FROM t1; END }
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} {1 2 3 4}
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do_test 1.6 {
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db2 eval { SELECT * FROM t1; END }
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} {1 2 3 4}
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do_test 1.7 {
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execsql { PRAGMA wal_checkpoint = truncate }
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file size test.db-wal
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} 0
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do_test 1.8 {
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execsql BEGIN db3
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list [catch { sqlite3_snapshot_open_blob db3 main $snap } msg] $msg
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} {1 SQLITE_ERROR_SNAPSHOT}
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#-------------------------------------------------------------------------
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reset_db
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do_execsql_test 2.0 {
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PRAGMA journal_mode = wal;
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CREATE TABLE t1(a, b);
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INSERT INTO t1 VALUES(1, 2);
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INSERT INTO t1 VALUES(3, 4);
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} {wal}
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sqlite3 db2 test.db
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sqlite3 db3 test.db
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do_execsql_test -db db2 2.0.1 {
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SELECT * FROM t1
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} {1 2 3 4}
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do_execsql_test -db db3 2.0.2 {
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SELECT * FROM t1
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} {1 2 3 4}
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do_execsql_test -db db2 2.2 {
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PRAGMA wal_checkpoint;
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} {0 4 4}
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do_test 2.1 {
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db eval { BEGIN }
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set snap [sqlite3_snapshot_get db main]
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set {} {}
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} {}
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do_execsql_test -db db2 2.3 {
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INSERT INTO t1 VALUES(5, 6);
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} {}
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do_test 2.2 {
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execsql { BEGIN } db3
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sqlite3_snapshot_open db3 main $snap
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} {}
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sqlite3_snapshot_free $snap
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finish_test
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