PHP PHPUnit assertFileNotExists()用法及代码示例

assertFileNotExists()函数是PHPUnit中的内置函数，用于断言文件是否存在于给定路径中。如果给定的文件路径不存在，则该断言将返回true，否则返回false。如果为真，则通过断言的测试用例，否则测试用例失败。

用法:

assertFileNotExists(string $filename[, string $message = ''])

参数：此函数接受上述和以下描述的两个参数：

• $filename:此参数是表示文件路径的字符串。
• $message:此参数采用字符串值。当测试用例失败时，此字符串消息将显示为错误消息。

以下示例程序旨在说明PHPUnit中的assertFileNotExists()函数：

程序1:

<?php  
use PHPUnit\Framework\TestCase;  
    
class GeeksPhpunitTestCase extends TestCase  
{  
    public function testNegativeTestcaseForAssertFileNotExists()  
    {  
        $filename = "/home/bittu/Documents/php/";  
    
        // Assert function to test whether given  
        // file name exists or not  
        $this->assertFileNotExists(  
            $filename,  
            "filename exists at given path"
        );  
    }  
}  
    
?> 

输出：

PHPUnit 8.5.8 by Sebastian Bergmann and contributors.

F                                             1 / 1 (100%)

Time:391 ms, Memory:10.00 MB

There was 1 failure:

1) GeeksPhpunitTestCase::testNegativeTestcaseForAssertFileNotExists
filename exists at given path
Failed asserting that file "/home/bittu/Documents/php/" not exists.

/home/lovely/Documents/php/test.php:15

FAILURES!
Tests:1, Assertions:1, Failures:1.

程序2:

<?php  
use PHPUnit\Framework\TestCase;  
    
class GeeksPhpunitTestCase extends TestCase  
{  
    public function testPositiveTestcaseForAssertFileNotExists()  
    {  
        $filename = "/home/Documents/geeksDoesNotExist/";  
    
        // Assert function to test whether given  
        // file name exists or not  
        $this->assertFileNotExists(  
            $filename,  
            "filename exists"
        );  
    }  
}  
    
?> 

输出：

PHPUnit 8.5.8 by Sebastian Bergmann and contributors.

.                                             1 / 1 (100%)

Time:88 ms, Memory:10.00 MB

OK (1 test, 1 assertion)