--- /dev/null
+use strict;
+use warnings;
+
+use Test::More;
+use DBIx::Class::Optional::Dependencies ();
+use lib qw(t/lib);
+use DBICTest;
+use Scope::Guard ();
+
+plan skip_all => 'Test needs ' . DBIx::Class::Optional::Dependencies->req_missing_for ('test_dt')
+. ' and ' .
+DBIx::Class::Optional::Dependencies->req_missing_for ('test_rdbms_informix')
+ unless DBIx::Class::Optional::Dependencies->req_ok_for ('test_dt')
+ && DBIx::Class::Optional::Dependencies->req_ok_for ('test_rdbms_informix');
+
+my ($dsn, $user, $pass) = @ENV{map { "DBICTEST_INFORMIX_${_}" } qw/DSN USER PASS/};
+
+if (not $dsn) {
+ plan skip_all => <<'EOF';
+Set $ENV{DBICTEST_INFORMIX_DSN} _USER and _PASS to run this test'.
+Warning: This test drops and creates a table called 'event'";
+EOF
+}
+
+my $schema;
+
+{
+ $schema = DBICTest::Schema->connect($dsn, $user, $pass, {
+ on_connect_call => [ 'datetime_setup' ],
+ });
+
+ my $sg = Scope::Guard->new(sub { cleanup($schema) } );
+
+ eval { $schema->storage->dbh->do('DROP TABLE event') };
+ $schema->storage->dbh->do(<<'SQL');
+ CREATE TABLE event (
+ id INT PRIMARY KEY,
+ starts_at DATE,
+ created_on DATETIME YEAR TO FRACTION(5)
+ );
+SQL
+ my $rs = $schema->resultset('Event');
+
+ my $dt = DateTime->now;
+ $dt->set_nanosecond(555640000);
+
+ my $date_only = DateTime->new(
+ year => $dt->year, month => $dt->month, day => $dt->day
+ );
+
+ my $row;
+ ok( $row = $rs->create({
+ id => 1,
+ starts_at => $date_only,
+ created_on => $dt,
+ }));
+ ok( $row = $rs->search({ id => 1 }, { select => [qw/starts_at created_on/] })
+ ->first
+ );
+ is $row->created_on, $dt, 'TIMESTAMP as DateTime roundtrip';
+
+ cmp_ok $row->created_on->nanosecond, '==', $dt->nanosecond,
+ 'fractional part of a second survived';
+
+ is $row->starts_at, $date_only, 'DATE as DateTime roundtrip';
+}
+
+done_testing;
+
+# clean up our mess
+sub cleanup {
+ my $schema = shift;
+ my $dbh;
+ eval {
+ $dbh = $schema->storage->dbh;
+ };
+ return unless $dbh;
+
+ eval { $dbh->do(qq{DROP TABLE $_}) } for qw/event/;
+}