Add test for session similarity

Author: MGatner

tests/FilterTest.php

@@ -52,6 +52,19 @@ public function testUserIdIncrements(): void
         $this->seeInDatabase('visits', ['views' => 2]);
     }
 
+    /**
+     * @runInSeparateProcess
+     */
+    public function testSessionIdIncrements(): void
+    {
+        config('Visits')->trackingMethod = 'session_id';
+        session_id('abc123');
+        $this->call();
+        $this->call();
+
+        $this->seeInDatabase('visits', ['views' => 2]);
+    }
+
     public function testBeforeRecords(): void
     {
         $this->call('before');