Bug 24786: (QA follow-up) Mock UseCashRegister in tests

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

t/db_dependent/Koha/Template/Plugin/Registers.t

@@ -66,10 +66,12 @@ subtest 'session_register_name' => sub {
 
 subtest 'all() tests' => sub {
 
-    plan tests => 20;
+    plan tests => 21;
 
     $schema->storage->txn_begin;
 
+    t::lib::Mocks::mock_preference( 'UseCashRegisters', 1 );
+
     my $count = Koha::Cash::Registers->search({ archived => 0 })->count;
     my $max_register = Koha::Cash::Registers->search( {},
         { order_by => { '-desc' => 'id' }, rows => 1 } )->single;
@@ -110,8 +112,8 @@ subtest 'all() tests' => sub {
         {
             class => 'Koha::Cash::Registers',
             value => {
-                branch => $library2->branchcode,
-                archived       => 0
+                branch   => $library2->branchcode,
+                archived => 0
             }
         }
     );
@@ -177,6 +179,10 @@ subtest 'all() tests' => sub {
         );
     }
 
+    t::lib::Mocks::mock_preference( 'UseCashRegisters', 0 );
+    $result = $plugin->all();
+    is( $result, undef, "Return undef when UseCashRegisters is disabled" );
+
     $schema->storage->txn_rollback;
 };