PHP PHPUnit assertFalse()用法及代码示例

assertFalse()函数是PHPUnit中的内置函数，用于断言条件值是true还是false。如果条件值为true，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:

assertFalse(bool $condition[, string $message = ''])

参数：此函数接受上述和以下描述的两个参数：

• $condition:此参数是代表true或false的任何类型的值。
• $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：Parameters中的assertfalse()函数：

范例1：

<?php  
use PHPUnit\Framework\TestCase;  
    
class GeeksPhpunitTestCase extends TestCase  
{  
    public function testNegativeTestcaseForassertFalse() 
    {  
        $condition = true; 
          
    
        // Assert function to test whether 
        // condition value is true or not  
        $this->assertFalse( 
          
            $condition,  
            "condition is true or false"
        );  
    }  
}  
    
?>

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::testPsitiveTestcaseForassertFalse
condition is true or false
Failed asserting that true is false.

/home/lovely/Documents/php/test.php:17

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

范例2：

<?php  
use PHPUnit\Framework\TestCase;  
    
class GeeksPhpunitTestCase extends TestCase  
{  
    public function testPositiveTestcaseForassertFalse() 
    {  
        $condition = false; 
          
    
        // Assert function to test whether 
        // condition value is true or not  
        $this->assertFalse( 
          
            $condition,  
            "condition is true or false"
        );  
    }  
}  
    
?>

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#assertfalse