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。