PHP PHPUnit assertIsIterable()用法及代码示例

assertIsIterable()函数是PHPUnit中的内置函数，用于断言给定变量是否为Iterable。如果给定变量为Iterable，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:

assertIsIterable($actual[, $message = ''])

参数：此函数接受上述和以下描述的两个参数：

• $variable:此参数可以是代表实际数据的任何类型的变量。
• $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assertIsIterable()函数：

范例1：

<?php  
use PHPUnit\Framework\TestCase;  
    
class GeeksPhpunitTestCase extends TestCase  
{  
    public function testNegativeTestcaseForassertIsIterable() 
    {  
       $variable = "[1, 2, 3]"; 
        // Assert function to test whether assert 
        //  variable is Iterable or not 
        $this->assertIsIterable( 
            $variable, 
            "assert variable is Iterable or not"
        ); 
          
    } 
   
 }  
?> 

输出：

PHPUnit 8.5.8 by Sebastian Bergmann and contributors.

F                                                   1 / 1 (100%)

Time:89 ms, Memory:10.00 MB

There was 1 failure:

1) GeeksPhpunitTestCase::testPositiveTestcaseForassertIsIterable
assert variable is Iterable or not
Failed asserting that '[1, 2, 3]' is of type "iterable".

/home/lovely/Documents/php/test.php:14

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

范例2：

<?php  
use PHPUnit\Framework\TestCase;  
    
class GeeksPhpunitTestCase extends TestCase  
{  
    public function testPositiveTestcaseForassertIsIterable() 
    {  
       $variable = [1, 2, 3]; 
         // Assert function to test whether assert 
        //  variable is Iterable or not 
        $this->assertIsIterable( 
            $variable, 
            "assert variable is Iterable or not"
        ); 
          
    } 
   
 }  
?> 

输出：

PHPUnit 8.5.8 by Sebastian Bergmann and contributors.

.                                                  1 / 1 (100%)

Time:89 ms, Memory:10.00 MB

OK (1 test, 1 assertion)

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