Bug 20590: Unit tests

Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>

t/Koha/Exceptions.t

@@ -0,0 +1,38 @@
+#!/usr/bin/perl
+
+# This file is part of Koha.
+#
+# Koha is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# Koha is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Koha; if not, see <http://www.gnu.org/licenses>.
+
+use Modern::Perl;
+
+use Test::More tests => 1;
+use Test::Exception;
+
+subtest 'Koha::Exceptions::Object::FKConstraint tests' => sub {
+
+    plan tests => 3;
+
+    use_ok('Koha::Exceptions::Object');
+
+    throws_ok
+        { Koha::Exceptions::Object::FKConstraint->throw( broken_fk => 'nasty', value => 'fk' ); }
+        'Koha::Exceptions::Object::FKConstraint',
+        'Exception is thrown :-D';
+
+    # stringify the exception
+    is( "$@", 'Invalid parameter passed, nasty=fk does not exist', 'Exception stringified correctly' );
+
+};
+