PHP PHPUnit assertArrayHasKey()用法及代码示例

assertArrayHasKey()函数是PHPUnit中的内置函数，用于断言具有特定键的数组，如果数组具有提供的键，则此断言将返回true;否则返回false;如果为true，则断言测试用例通过了，否则测试用例失败。

用法：

assertArrayHasKey(mixed $key, array $array[, string $message = ''])

参数：该函数接受三个参数，如以上语法所示。参数说明如下：

1. $key：此参数表示数组要包含的键的名称。
2. $array：此参数是要为其搜索 key 的数组。
3. $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assertArrayHasKey()函数：

程序1:：

<?php 
use PHPUnit\Framework\TestCase; 
  
class GeeksPhpunitTestCase extends TestCase 
{ 
    public function testNegativeTestcaseForArrayHasKey() 
    { 
        // array to be tested 
        $array  = array('geek' => 'geeksForgeeks', ); 
        // assert function to test whether 'geek' is a key of array 
        $this->assertArrayHasKey('geeks', $array, "Array doesn't contains 'geeks' as key"); 
    } 
} 
  
?>

输出：

PHPUnit 6.5.5 by Sebastian Bergmann and contributors.

F                                                                   1 / 1 (100%)

Time:108 ms, Memory:4.00MB

There was 1 failure:

1) GeeksPhpunitTestCase::testNegativeTestcaseForArrayHasKey
Array doesn't contains 'geeks' as key
Failed asserting that an array has the key 'geeks'.

/home/shivam/Documents/geeks/phpunit/abc.php:9

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

程序2:：

<?php 
use PHPUnit\Framework\TestCase; 
  
class GeeksPhpunitTestCase extends TestCase 
{ 
    public function testPositiveTestcaseForArrayHasKey() 
    { 
        // array to be tested 
        $array  = array('geeks' => 'geeksForgeeks', ); 
        // assert function to test whether 'geeks' is a key of array 
        $this->assertArrayHasKey('geeks', $array, "Array doesn't contains 'geeks' as key"); 
    } 
} 
  
?>

输出：

PHPUnit 6.5.5 by Sebastian Bergmann and contributors.

.                                                                   1 / 1 (100%)

Time:21 ms, Memory:4.00MB

OK (1 test, 1 assertion)

注意：要使用phpunit运行测试用例，请遵循此处的步骤。