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PHP PHPUnit assertStringStartsWith()用法及代码示例


assertStringStartsWith()函数是PHPUnit中的内置函数,用于断言实际字符串是否以预期的前缀字符串开头。如果实际字符串以预期的前缀字符串开头,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:

assertStringStartsWith(string $prefix, string $string
[, string $message = ''])

参数:此函数接受上述和以下所述的三个参数:

  • $expectedprefix:此参数可以是代表所需前缀字符串的任何类型。
  • $actualstring:此参数可以是代表实际字符串的任何类型。
  • $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assertStringStartsWith()函数:

范例1:



PHP

<?php  
use PHPUnit\Framework\TestCase;  
    
class GeeksPhpunitTestCase extends TestCase  
{  
    public function testNegativeTestcaseForassertStringStartsWith() 
    {  
        $expectedprefix = ('dis'); 
        $actualstring = ('agreedis'); 
    
        // Assert function to test whether  
        // actual string content starts with  
        // expected prefix string content or not 
        $this->assertStringStartsWith( 
            $expectedprefix, 
            $actualstring,  
            "actual string content start with expected  
             prefix content 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::testNegativeTestcaseForassertStringStartsWith
actual string content start with expected prefix content or not
Failed asserting that 'agreedis' starts with "dis".

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

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

范例2:

PHP

<?php  
use PHPUnit\Framework\TestCase;  
    
class GeeksPhpunitTestCase extends TestCase  
{  
    public function testPositiveTestcaseForassertStringStartsWith() 
    {  
        $expectedprefix = ('dis'); 
        $actualstring = ('disagree'); 
    
        // Assert function to test whether  
        // actual string content starts with  
        // expected prefix string content or not 
        $this->assertStringStartsWith( 
            $expectedprefix, 
            $actualstring,  
            "actual string content start with expected  
             prefix content or not" 
        );  
    }  
}  
    
?>

输出:

PHPUnit 8.5.8 by Sebastian Bergmann and contributors.

.                                                 1 / 1 (100%)

Time:88 ms, Memory:10.00 MB

OK (1 test, 1 assertion)

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




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注:本文由纯净天空筛选整理自shubham_singh大神的英文原创作品 PHPUnit assertStringStartsWith() Function。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。