Correct the state of PostgreSQL serial sequence during tests

tests/cases/Db/PostgreSQL/TestDatabase.php

@@ -14,6 +14,27 @@ class TestDatabase extends \JKingWeb\Arsse\TestCase\Database\Base {
     protected static $implementation = "PDO PostgreSQL";
 
     protected function nextID(string $table): int {
-        return (int) static::$drv->query("SELECT cast(last_value as bigint) + 1 from pg_sequences where sequencename = '{$table}_id_seq'")->getValue();
+        return ((int) static::$drv->query("SELECT last_value from pg_sequences where sequencename = '{$table}_id_seq'")->getValue()) + 1;
+    }
+
+    public function setUp() {
+        parent::setUp();
+        $seqList = 
+            "select 
+                replace(substring(column_default, 10), right(column_default, 12), '') as seq, 
+                table_name as table, 
+                column_name as col 
+            from information_schema.columns 
+                where table_name like 'arsse_%' 
+                and column_default like 'nextval(%'
+            ";
+        foreach(static::$drv->query($seqList) as $r) {
+            $num = static::$drv->query("SELECT max({$r['col']}) from {$r['table']}")->getValue();
+            if (!$num) {
+                continue;
+            }
+            $num++;
+            static::$drv->exec("ALTER SEQUENCE {$r['seq']} RESTART WITH $num");
+        }
     }
 }