PHP PHPUnit assertIsReadable()用法及代码示例

assertIsReadable()函数是PHPUnit中的内置函数，用于断言assertIsReadable指定的文件名是否可读。如果给定的文件名是可读的，则此断言将返回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:

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

参数：此函数接受上述和以下描述的两个参数：

• $filename:此参数是表示文件名的字符串。
• $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。

以下示例说明了PHPUnit中的assertIsReadable()函数：

范例1：

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

输出：

PHPUnit 8.5.8 by Sebastian Bergmann and contributors.

F                                                    1 / 1 (100%)

Time:87 ms, Memory:10.00 MB

There was 1 failure:

1) GeeksPhpunitTestCase::testPositiveTestcaseForassertIsReadable
filename is readable or Not
Failed asserting that "/home/lovely/Documents/phptest" is readable.

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

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

范例2：

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

输出：

PHPUnit 8.5.8 by Sebastian Bergmann and contributors.

.                                               1 / 1 (100%)

Time:91 ms, Memory:10.00 MB

OK (1 test, 1 assertion)

参考：https://phpunit.readthedocs.io/en/9.2/assertions.html#assertisreadable