#!/usr/bin/perl -w

use strict;
BEGIN {
	$|  = 1;
	$^W = 1;
}

use t::lib::Test;
use Test::More tests => 94;
use Test::NoWarnings;

my $dbh = connect_ok(
	AutoCommit => 1,
	RaiseError => 1,
	PrintError => 0,
);

$dbh->do('create table foo (id)');

# scenario 1: AutoCommit => 1 and no begin_work

ok $dbh->{AutoCommit}, "AutoCommit is on";
ok !$dbh->{BegunWork},  "BegunWork is off";
eval { $dbh->do('insert into foo (id) values (1)'); };
ok !$@, 'a statement works';
diag $@ if $@;
# eval { $dbh->rollback };
# ok !$@, "rollback ignored: nothing to be rolled back";
# diag $@ if $@;
ok $dbh->{AutoCommit}, "AutoCommit is still on";
ok !$dbh->{BegunWork},  "BegunWork is still off";

# scenario 2: AutoCommit => 1 and begin_work and implicit BEGIN

eval { $dbh->begin_work };
ok !$@, "begin_work works";
ok !$dbh->{AutoCommit}, "AutoCommit is turned off";
ok $dbh->{BegunWork},    "BegunWork is turned on";
eval { $dbh->begin_work };
like $@ => qr/Already in a transaction/, "but second begin_work should fail";
eval { $dbh->do('insert into foo (id) values (1)'); };
ok !$@, "other statement should work";
diag $@ if $@;
eval { $dbh->rollback };
ok !$@, 'rolled back';
diag $@ if $@;
ok $dbh->{AutoCommit}, "AutoCommit is turned on";
ok !$dbh->{BegunWork},  "BegunWork is turned off";

# scenario 3: AutoCommit => 1 and begin_work and explicit and immediate BEGIN

eval { $dbh->begin_work };
ok !$@, "begin_work works";
ok !$dbh->{AutoCommit}, "AutoCommit is turned off";
ok $dbh->{BegunWork},    "BegunWork is turned on";
eval { $dbh->do('BEGIN EXCLUSIVE TRANSACTION') };
ok !$@, "first BEGIN should be passed through";
diag $@ if $@;
eval { $dbh->do('BEGIN TRANSACTION') };
like $@ => qr/cannot start a transaction/, "second BEGIN should fail";
eval { $dbh->begin_work };
like $@ => qr/Already in a transaction/, "and second begin_work also should fail";
eval { $dbh->do('insert into foo (id) values (1)'); };
ok !$@, 'other statement should work';
diag $@ if $@;
eval { $dbh->rollback };
ok !$@, 'rolled back';
diag $@ if $@;
ok $dbh->{AutoCommit}, "AutoCommit is turned on now";
ok !$dbh->{BegunWork},  "BegunWork is turned off";

# scenario 4: AutoCommit => 1 and begin_work and explicit but not immediate BEGIN
eval { $dbh->begin_work };
ok !$@, "begin_work works";
ok !$dbh->{AutoCommit}, "AutoCommit is turned off";
ok $dbh->{BegunWork},    "BegunWork is turned on";
eval { $dbh->do('insert into foo (id) values (1)'); };
ok !$@, 'statement should work';
diag $@ if $@;
eval { $dbh->do('BEGIN TRANSACTION') };
like $@ => qr/cannot start a transaction/, "BEGIN after other statements should fail";
eval { $dbh->begin_work };
like $@ => qr/Already in a transaction/, "and second begin_work also should fail";
eval { $dbh->do('insert into foo (id) values (1)'); };
ok !$@, 'other statement should work';
diag $@ if $@;
eval { $dbh->rollback };
ok !$@, 'rolled back';
diag $@ if $@;
ok $dbh->{AutoCommit}, "AutoCommit is turned on now";
ok !$dbh->{BegunWork},  "BegunWork is turned off";

# scenario 5: AutoCommit => 1 and explicit BEGIN and no begin_work
ok $dbh->{AutoCommit}, "AutoCommit is on";
ok !$dbh->{BegunWork},    "BegunWork is off";
eval { $dbh->do('BEGIN TRANSACTION'); };
ok !$@, 'BEGIN should work';
diag $@ if $@;
ok !$dbh->{AutoCommit}, "AutoCommit is turned off";
ok $dbh->{BegunWork},    "BegunWork is turned on";
eval { $dbh->do('BEGIN TRANSACTION') };
like $@ => qr/cannot start a transaction/, "second BEGIN should fail";
eval { $dbh->do('insert into foo (id) values (1)'); };
ok !$@, 'other statement should work';
diag $@ if $@;
eval { $dbh->rollback };
ok !$@, 'rolled back';
diag $@ if $@;
ok $dbh->{AutoCommit}, "AutoCommit is turned on now";
ok !$dbh->{BegunWork},  "BegunWork is turned off";

# scenario 6: AutoCommit => 1 and explicit BEGIN and begin_work
ok $dbh->{AutoCommit}, "AutoCommit is on";
ok !$dbh->{BegunWork},    "BegunWork is off";
eval { $dbh->do('BEGIN TRANSACTION'); };
ok !$@, 'BEGIN should work';
diag $@ if $@;
ok !$dbh->{AutoCommit}, "AutoCommit is turned off";
ok $dbh->{BegunWork},    "BegunWork is turned on";
eval { $dbh->do('BEGIN TRANSACTION') };
like $@ => qr/cannot start a transaction/, "second BEGIN should fail";
eval { $dbh->begin_work };
like $@ => qr/Already in a transaction/, "and second begin_work also should fail";
eval { $dbh->do('insert into foo (id) values (1)'); };
ok !$@, 'other statement should work';
diag $@ if $@;
eval { $dbh->rollback };
ok !$@, 'rolled back';
diag $@ if $@;
ok $dbh->{AutoCommit}, "AutoCommit is turned on now";
ok !$dbh->{BegunWork},  "BegunWork is turned off";

# scenario 7: AutoCommit => 0 and explicit BEGIN
eval { $dbh->{AutoCommit} = 1 }; # to initialize
ok $dbh->{AutoCommit}, "AutoCommit is on";
ok !$dbh->{BegunWork},  "BegunWork is off";
eval { $dbh->{AutoCommit} = 0 };
ok !$@, "AutoCommit is turned off";
ok !$dbh->{BegunWork},    "BegunWork is still off";
eval { $dbh->do('BEGIN TRANSACTION'); };
ok !$@, 'BEGIN should work';
diag $@ if $@;
ok !$dbh->{AutoCommit}, "AutoCommit is turned off";
ok !$dbh->{BegunWork},   "BegunWork is still off";
eval { $dbh->do('BEGIN TRANSACTION') };
like $@ => qr/cannot start a transaction/, "second BEGIN should fail";
eval { $dbh->begin_work };
like $@ => qr/Already in a transaction/, "and begin_work also should fail";
eval { $dbh->do('insert into foo (id) values (1)'); };
ok !$@, 'other statement should work';
diag $@ if $@;
eval { $dbh->rollback };
ok !$@, 'rolled back';
diag $@ if $@;
ok !$dbh->{AutoCommit}, "AutoCommit is still off";
ok !$dbh->{BegunWork},   "BegunWork is still off";

# scenario 8: AutoCommit => 0 and begin_work
eval { $dbh->{AutoCommit} = 1 }; # to initialize
ok $dbh->{AutoCommit}, "AutoCommit is on";
ok !$dbh->{BegunWork},  "BegunWork is off";
eval { $dbh->{AutoCommit} = 0 };
ok !$@, "AutoCommit is turned off";
ok !$dbh->{BegunWork}, "BegunWork is still off";
eval { $dbh->begin_work; };
like $@ => qr/Already in a transaction/, "begin_work should fail";
ok !$dbh->{AutoCommit}, "AutoCommit is still off";
ok !$dbh->{BegunWork},   "BegunWork is still off";
eval { $dbh->do('BEGIN TRANSACTION') };
ok !$@, "BEGIN should work";
diag $@ if $@;
ok !$dbh->{AutoCommit}, "AutoCommit is still off";
ok !$dbh->{BegunWork},   "BegunWork is still off";
eval { $dbh->begin_work };
like $@ => qr/Already in a transaction/, "and second begin_work also should fail";
eval { $dbh->do('insert into foo (id) values (1)'); };
ok !$@, 'other statement should work';
diag $@ if $@;
eval { $dbh->rollback };
ok !$@, 'rolled back';
diag $@ if $@;
ok !$dbh->{AutoCommit}, "AutoCommit is still off";
ok !$dbh->{BegunWork},   "BegunWork is still off";

# scenario 9: AutoCommit => 0 and implicit BEGIN
eval { $dbh->{AutoCommit} = 1 }; # to initialize
ok $dbh->{AutoCommit}, "AutoCommit is on";
ok !$dbh->{BegunWork},  "BegunWork is off";
eval { $dbh->{AutoCommit} = 0 };
ok !$@, "AutoCommit is turned off";
ok !$dbh->{BegunWork}, "BegunWork is still off";
eval { $dbh->do('insert into foo (id) values (1)'); };
ok !$@, 'other statement should work';
diag $@ if $@;
ok !$dbh->{AutoCommit}, "AutoCommit is still off";
ok !$dbh->{BegunWork},   "BegunWork is still off";
eval { $dbh->rollback };
ok !$@, 'rolled back';
diag $@ if $@;
ok !$dbh->{AutoCommit}, "AutoCommit is still off";
ok !$dbh->{BegunWork},  "BegunWork is still off";