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SQLite training in Houston TX on 2019-11-05 (details)
Part of the 2019 Tcl Conference

Artifact 28a08d5cb5fb5b5702a46e19176e45e964e0800d1f894677169e79f34030e152:


# 2017 September 15
#
# 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.
#

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

if {[permutation]=="inmemory_journal"} {
  finish_test
  return
}

# Test that nothing bad happens if a journal file contains a pointer to
# a master journal file that does not have a "-" in the name. At one point
# this was causing a segfault on unix.
#
do_execsql_test 1.0 {
  CREATE TABLE t1(a, b);
}

do_test 1.1 {
  forcedelete test.db2journal test.db-journal

  close [open test.db-journal w]
  
  hexio_write test.db-journal 0 746573742e6462326a6f75726e616c00
  hexio_write test.db-journal 16 00000010
  hexio_write test.db-journal 20 000005e1
  hexio_write test.db-journal 24 d9d505f920a163d7

  close [open test.db2journal w]
  hexio_write test.db2journal 0 abcd
} {2}

do_execsql_test 1.2 {
  SELECT * FROM t1;
}

do_test 1.3 {
  forcedelete test0db2journal test.db-journal
  close [open test.db-journal w]
  hexio_write test.db-journal 0 74657374306462326a6f75726e616c00
  hexio_write test.db-journal 16 00000010
  hexio_write test.db-journal 20 000005e3
  hexio_write test.db-journal 24 d9d505f920a163d7

  close [open test0db2journal w]
  hexio_write test0db2journal 0 abcd
} {2}

do_execsql_test 1.4 {
  SELECT * FROM t1;
}

# And now test that nothing bad happens if a master journal contains a
# pointer to a journal file that does not have a "-" in the name. 
#
do_test 1.5 {
  forcedelete test.db2-master test.db-journal test1
  close [open test.db-journal w]
  hexio_write test.db-journal 0 746573742e6462322d6d617374657200
  hexio_write test.db-journal 16 00000010
  hexio_write test.db-journal 20 0000059f
  hexio_write test.db-journal 24 d9d505f920a163d7

  close [open test.db2-master w]
  hexio_write test.db2-master 0 746573743100

  close [open test1 w]
  hexio_write test1 0 abcd
} {2}

do_execsql_test 1.6 {
  SELECT * FROM t1;
}

#-------------------------------------------------------------------------
# Check that master journals are not created if the transaction involves
# multiple temp files.
#
db close
testvfs tvfs
tvfs filter xOpen
tvfs script open_cb
set ::open ""
proc open_cb {method file arglist} {
  lappend ::open $file
}

proc contains_mj {} {
  foreach f $::open {
    set t [file tail $f]
    if {[string match *mj* $t]} { return 1 }
  }
  return 0
}

# Like [do_execsql_test], except that a boolean indicating whether or
# not a master journal file was opened ([file tail] contains "mj") or
# not. Example:
#
#   do_hasmj_test 1.0 { SELECT 'a', 'b' } {0 a b}
#
proc do_hasmj_test {tn sql expected} {
  set ::open [list]
  uplevel [list do_test $tn [subst -nocommands {
    set res [execsql "$sql"]
    concat [contains_mj] [set res]
  }] [list {*}$expected]]
}

forcedelete test.db
forcedelete test.db2
forcedelete test.db3
sqlite3 db test.db -vfs tvfs

do_execsql_test 2.0 {
  ATTACH 'test.db2' AS dbfile;
  ATTACH ''         AS dbtemp;
  ATTACH ':memory:'  AS dbmem;

  CREATE TABLE t1(x);
  CREATE TABLE dbfile.t2(x);
  CREATE TABLE dbtemp.t3(x);
  CREATE TABLE dbmem.t4(x);
}

# Two real files.
do_hasmj_test 2.1 {
  BEGIN;
    INSERT INTO t1 VALUES(1);
    INSERT INTO t2 VALUES(1);
  COMMIT;
} {1}

# One real, one temp file.
do_hasmj_test 2.2 {
  BEGIN;
    INSERT INTO t1 VALUES(1);
    INSERT INTO t3 VALUES(1);
  COMMIT;
} {0}

# One file, one :memory: db.
do_hasmj_test 2.3 {
  BEGIN;
    INSERT INTO t1 VALUES(1);
    INSERT INTO t4 VALUES(1);
  COMMIT;
} {0}

finish_test