first_name = 'John'; $user->last_name = 'Doe'; $this->assertEquals('John Doe', $user->full_name); } public function testFormatsEmail(): void { $user = new User(); $user->first_name = 'Jane'; $user->last_name = 'Smith'; $user->email = 'jane.smith@email.com'; $this->assertEquals('Jane Smith ', $user->formatted_email); } }