PHPUnit抗辩人

我对PHPUnit比较陌生，我一直在尝试做一个简单的测试，在成功登录时返回true/false。下面是我的源代码

 <?php
 include 'user.php';

 class test extends PHPUnit\Framework\TestCase
 {
   
    public function login($username, $password)
    {
        $user = new user(); 
        $login = $user-> login($username = 'username1', $password = '123456';
    
        if ($login)
        {
            return true; 
        }
    }  
   
    public function testTrue($username, $password)
    {
        
        if ($actual = (new login())-> login('username1', '123456'))
            
            $this->assertSame($expected = true, $actual);
        else
             
            $this->assertSame($expected = fail, $actual);
        
    }
} 
?>

而不是

if ($actual = (new login())-> login('username1', '123456'))

使用

if ($actual = ($this->login('username1', '123456'))