# 2020 July 17
#
# 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.
#
#***********************************************************************
#


set testdir [file dirname $argv0]
source $testdir/tester.tcl
set ::testprefix concurrent8

source $testdir/lock_common.tcl

ifcapable !concurrent {
  finish_test
  return
}

do_multiclient_test tn {

  do_test 1.$tn.0 {
    sql1 {
      CREATE TABLE t1(x, y);
      PRAGMA journal_mode = wal;
    }
  } {wal}

  do_test 1.$tn.1 {
    sql1 {
      BEGIN CONCURRENT;
        INSERT INTO t1 VALUES(1, 1);
    }
  } {}

  do_test 1.$tn.2 {
    sql2 {
      CREATE TABLE t2(a, b);
    }
  } {}

  do_test 1.$tn.3 {
    list [catch { sql1 { COMMIT } } msg] $msg
  } {1 {database is locked}}

  do_test 1.$tn.4 {
    code1 { db errorcode }
  } {517}  ;# SQLITE_BUSY_SNAPSHOT

  do_test 1.$tn.5 {
    sql1 {
      ROLLBACK;
      BEGIN CONCURRENT;
        CREATE TABLE t3(a, b);
      COMMIT;
    }
  } {}

  do_test 1.$tn.6 {
    set nPg [sql1 {PRAGMA page_count}]
    sql1 "BEGIN CONCURRENT"
    for {set i 0} {$i<250} {incr i} {
      sql1 "CREATE TABLE z$i (a, b, c)"
    }
    sql1 "COMMIT"
    set nPg2 [sql1 {PRAGMA page_count}]
    expr $nPg2>$nPg
  } {1}

  do_test 1.$tn.7 {
    sql2 { PRAGMA integrity_check }
  } {ok}

  do_test 1.$tn.8 {
    sql1 {
      BEGIN CONCURRENT;
        CREATE TABLE t4(a, b);
    }
    sql2 {
      INSERT INTO t1 VALUES(2, 2);
    }
    list [catch { sql1 COMMIT } msg] $msg
  } {1 {database is locked}}
  sql1 ROLLBACK

  do_test 1.$tn.9 {
    sql1 {
      BEGIN CONCURRENT;
        CREATE TEMP TABLE t5(a, b);
        INSERT INTO t2 VALUES('x', 'x');
    }
    sql2 {
      INSERT INTO t1 VALUES(3, 3);
      CREATE TEMP TABLE t1(x, y);
    }
    sql1 COMMIT 
  } {}
}



finish_test