test_send_teacher_remaider - fix userid

tests/booking_remainder_mails_test.php

@@ -184,14 +184,14 @@ public function test_send_teacher_remaider() {
         $this->assertEquals($option1->id, $events[1]->objectid);
         $this->assertEquals("sent", $events[1]->action);
         $this->assertEquals($user2->id, $events[1]->userid);
-
+var_dump($events[2]);
         // Checking that the 3rd event - student message - contains the expected values.
         $this->assertInstanceOf('\mod_booking\event\message_sent', $events[2]);
         $this->assertEquals(context_system::instance(), $events[2]->get_context());
         $this->assertNull($events[2]->objectid);
         $this->assertEquals("sent", $events[2]->action);
         $this->assertEquals($user2->id, $events[2]->userid);
-        $this->assertEquals($user3->id, $events[2]->relateduserid);
+        $this->assertEquals($user1->id, $events[2]->relateduserid);
 
         // Checking that the 4th event - teacher reminder - contains the expected values.
         $this->assertInstanceOf('\mod_booking\event\reminder_teacher_sent', $events[3]);