Bug 24665: (QA follow-up) Add tests for 'selected'

Add a unit test to prove the 'selected' param passed to
Koha::Template::Plugin::Registers is adhered to.

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

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

@@ -66,7 +66,7 @@ subtest 'session_register_name' => sub {
 
 subtest 'all() tests' => sub {
 
-    plan tests => 21;
+    plan tests => 25;
 
     $schema->storage->txn_begin;
 
@@ -179,6 +179,22 @@ subtest 'all() tests' => sub {
         );
     }
 
+    $result = $plugin->all( { filters => { current_branch => 1 }, selected => $register1->id } );
+    is( ref($result), 'ARRAY',
+"Return arrayref (userenv: branchcode + register_id, filters: current_branch, selected: register 1)"
+    );
+    is(
+        scalar( @{$result} ),
+        2,
+"Array contains 2 branch registers (userenv: branchcode + register_id, filters: current_branch, selected: register 1)"
+    );
+    for my $register ( @{$result} ) {
+        my $selected = ( $register->{id} == $register1->id ) ? 1 : 0;
+        is( $register->{selected}, $selected,
+"Register is selected $selected (userenv: brancode, filters: current_branch, selected: register 1)"
+        );
+    }
+
     t::lib::Mocks::mock_preference( 'UseCashRegisters', 0 );
     $result = $plugin->all();
     is( $result, undef, "Return undef when UseCashRegisters is disabled" );