# 2021 November 16
#
# 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 alterfault

# If SQLITE_OMIT_ALTERTABLE is defined, omit this file.
ifcapable !altertable {
  finish_test
  return
}

do_execsql_test 1.0 {
  CREATE TABLE t1(a);                 
  CREATE TEMP TRIGGER tr1 AFTER INSERT ON t1 BEGIN
    SELECT 123;
  END;
}
faultsim_save_and_close

do_faultsim_test 1.1 -faults oom* -prep {
  faultsim_restore_and_reopen
} -body {
  execsql {
    ALTER TABLE t1 ADD COLUMN b CHECK (a!=1)
  }
} -test {
  faultsim_test_result {0 {}}
}

reset_db
do_execsql_test 2.0 {
  CREATE TABLE x1(d, e CONSTRAINT abc NOT NULL, f);
}
faultsim_save_and_close

foreach {tn sql} {
  1 { ALTER TABLE x1 ADD CHECK (d!=1) }
  2 { ALTER TABLE x1 ADD CONSTRAINT xyz CHECK (f>d+e); }
  3 { ALTER TABLE x1 DROP CONSTRAINT abc }
  4 { ALTER TABLE x1 ALTER f SET NOT NULL }
  5 { ALTER TABLE x1 ALTER e DROP NOT NULL }
} {
  do_faultsim_test 2.$tn -faults oom* -prep {
    faultsim_restore_and_reopen
  } -body {
    execsql $::sql
  } -test {
    faultsim_test_result {0 {}}
  }
}

# Test an OOM when returning an error.
#
do_faultsim_test 2.e -faults oom* -prep {
  faultsim_restore_and_reopen
} -body {
  execsql {
    ALTER TABLE x1 DROP CONSTRAINT nosuchconstraint
  }
} -test {
  faultsim_test_result                           \
      {1 {no such constraint: nosuchconstraint}} \
      {1 {SQL logic error}}
}

finish_test
