Bug 13277: t/SuggestionEngine_AuthorityFile.t shouldn't depend on the DB

To reproduce:
- Stop your MySQL server:
  $ sudo service mysql stop
- Run
  $ prove t/SuggestionEngine_AuthorityFile.t
=> FAIL: some tests fail because of mysql stopped

To test (MySQL still stopped)
- Apply the patch
- Run
  $ prove t/SuggestionEngine_AuthorityFile.t
=> SUCCESS: tests pass because the ycan be loaded regardless of
            the absence of the DB server
- Sign off :-D

Regards

Signed-off-by: Magnus Enger <digitalutvikling@gmail.com>
Turned off MySQL and ran the tests before and after the patch.
Works as advertized.

Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>

t/SuggestionEngine_AuthorityFile.t

@@ -1,20 +1,42 @@
 #!/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>.
+
 # This Koha test module uses Test::MockModule to get around the need for known
 # contents in the authority file by returning a single known authority record
 # for every call to SearchAuthorities
 
-use strict;
-use warnings;
+use Modern::Perl;
+
 use File::Spec;
 use MARC::Record;
 
 use Test::More;
 use Test::MockModule;
+use DBD::Mock;
 
-BEGIN {
-        use_ok('Koha::SuggestionEngine');
-}
+# Mock the DB connexion and C4::Context
+my $context = new Test::MockModule('C4::Context');
+$context->mock( '_new_dbh', sub {
+        my $dbh = DBI->connect( 'DBI:Mock:', '', '' )
+          || die "Cannot create handle: $DBI::errstr\n";
+        return $dbh;
+});
+
+use_ok('Koha::SuggestionEngine');
 
 my $module = new Test::MockModule('C4::AuthoritiesMarc');
 $module->mock('SearchAuthorities', sub {
@@ -41,3 +63,5 @@ my $result = $suggestor->get_suggestions({search => 'Cookery'});
 is_deeply($result, [ { 'search' => 'an=1234', 'relevance' => 1, 'label' => 'Cooking' } ], "Suggested correct alternative to 'Cookery'");
 
 done_testing();
+
+1;