PHP PHPUnit assertIsWritable()用法及代碼示例

assertIsWritable()函數是PHPUnit中的內置函數，用於斷言assertiswritable是否指定文件名可寫。如果給定的文件名存在並且可寫，則此斷言將返回true。如果為真，則通過斷言的測試用例，否則測試用例失敗。

用法:

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

參數：該函數接受兩個參數，如上麵的語法所示。參數說明如下：

• $filename:此參數是表示文件名的任何類型的字符串。
• $message:此參數采用字符串值。當測試用例失敗時，此字符串消息將顯示為錯誤消息。

以下示例說明了PHPUnit中的assertIsWritable()函數：

範例1：

<?php  
use PHPUnit\Framework\TestCase;  
    
class GeeksPhpunitTestCase extends TestCase  
{  
    public function testNegativeTestcaseForassertIsWritable() 
    {  
        $filename = "/home/lovely/Documents/php/GeeksPhpunitTestCase";  
    
        // Assert function to test whether given  
        // file name is writable or not  
        $this->assertIsWritable( 
            $filename,  
            "filename is writable or Not"
        );  
    }  
}  
    
?>

輸出：

 PHPUnit 8.5.8 by Sebastian Bergmann and contributors.

F                                                                      1 / 1 (100%)

Time:86 ms, Memory:10.00 MB

There was 1 failure:

1) GeeksPhpunitTestCase::testNegativeTestcaseForassertIsWritable
filename is writable or Not
Failed asserting that "/home/lovely/Documents/php/GeeksPhpunitTestCase" is writable.

/home/lovely/Documents/php/test.php:16

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

範例2：

<?php  
use PHPUnit\Framework\TestCase;  
    
class GeeksPhpunitTestCase extends TestCase  
{  
    public function testPositiveTestcaseForassertIsWritable() 
    {  
        $filename = "/home/lovely/Documents/php";  
    
        // Assert function to test whether given  
        // file name is writable or not  
        $this->assertIsWritable( 
            $filename,  
            "filename is writable or Not"
        );  
    }  
}  
    
?>

輸出：

PHPUnit 8.5.8 by Sebastian Bergmann and contributors.

.                                                 1 / 1 (100%)

Time:87 ms, Memory:10.00 MB

OK (1 test, 1 assertion)

參考：https://phpunit.readthedocs.io/en/9.2/assertions.html#assertiswritable