# 2017 April 25
#
# 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.  The
# focus of this script is testing the server mode of SQLite.
#


set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix serverwal

# Check files are created and deleted as expected.
#
do_execsql_test 1.0 {
  PRAGMA journal_mode = wal;
} {wal}
do_execsql_test 1.1 {
  CREATE TABLE t1(a, b);
}
do_execsql_test 1.2 {
  SELECT * FROM t1;
} {}
do_test 1.3 {
  lsort [glob test.db*]
} {test.db test.db-hma test.db-shm test.db-wal}
do_test 1.4 {
  db close
  glob test.db*
} {test.db}

#-------------------------------------------------------------------------
# Two concurrent transactions.
#
do_test 2.0 {
  sqlite3 db  test.db
  sqlite3 db2 test.db
  db eval {
    CREATE TABLE t2(a, b);
  }
} {}
do_test 2.1 {
  execsql {
    BEGIN;
      INSERT INTO t1 VALUES(1, 2);
  } db
  execsql {
    BEGIN;
      INSERT INTO t2 VALUES(1, 2);
  } db2
} {}
do_test 2.2 {
  execsql COMMIT db
  execsql COMMIT db2
} {}
db close

#-------------------------------------------------------------------------
# That the wal file can be wrapped around.
#
reset_db
do_execsql_test 3.0 {
  PRAGMA journal_mode = wal;
  CREATE TABLE ttt(a, b);
  INSERT INTO ttt VALUES(1, 2);
  INSERT INTO ttt VALUES(3, 4);
  INSERT INTO ttt VALUES(5, 6);
  INSERT INTO ttt VALUES(7, 8);
  INSERT INTO ttt VALUES(9, 10);
} {wal}

do_test 3.1 {
  set N [file size test.db-wal]
  execsql {
    PRAGMA wal_checkpoint;
    INSERT INTO ttt VALUES(11, 12);
    INSERT INTO ttt VALUES(13, 14);
  }
  expr {$N == [file size test.db-wal]}
} {1}

#-------------------------------------------------------------------------
# That ROLLBACK appears to work.
#
reset_db
do_execsql_test 4.0 {
  PRAGMA cache_size = 10;
  CREATE TABLE ttt(a, b);
  CREATE INDEX yyy ON ttt(b, a);
  PRAGMA journal_mode = wal;
  WITH s(i) AS (
    SELECT 1 UNION ALL SELECT i+1 FROM s WHERE i<100
  )
  INSERT INTO ttt SELECT randomblob(100), randomblob(100) FROM s;
} {wal}

do_execsql_test 4.1 {
  PRAGMA integrity_check;
  BEGIN;
    UPDATE ttt SET b=a;
  ROLLBACK;
  PRAGMA integrity_check;
} {ok ok}

finish_test

