phpunit - 测试输出不包含文本

Question

我知道如何使用 PHPUnit 库测试 php 输出，使用 expectOutputString()或 expectOutputString() .现在我需要确保输出不包含给定的字符串。我可以使用输出缓冲和在里面搜索字符串来做到这一点，但可能更好的方法是使用 expectOutputString()用适当的表达。

这个表达式应该如何构建？

Answer 1

您想使用正则表达式，并且要进行否定匹配，您必须使用先行断言语法。例如。测试输出不包含“hello”:

class OutputRegexTest extends PHPUnit_Framework_TestCase
{
    private $regex='/^((?!Hello).)*$/s';

    public function testExpectNoHelloAtFrontFails()
    {
        $this->expectOutputRegex($this->regex);
        echo "Hello World!\nAnother sentence\nAnd more!";
    }

    public function testExpectNoHelloInMiddleFails()
    {
        $this->expectOutputRegex($this->regex);
        echo "This is Hello World!\nAnother sentence\nAnd more!";
    }

    public function testExpectNoHelloAtEndFails()
    {
        $this->expectOutputRegex($this->regex);
        echo "A final Hello";
    }

    public function testExpectNoHello()
    {
        $this->expectOutputRegex($this->regex);
        echo "What a strange world!\nAnother sentence\nAnd more!";
    }
}

给出这个输出:

$ phpunit testOutputRegex.php 
PHPUnit 3.6.12 by Sebastian Bergmann.

FFF.

Time: 0 seconds, Memory: 4.25Mb

There were 3 failures:

1) OutputRegexTest::testExpectNoHelloAtFrontFails
Failed asserting that 'Hello World!
Another sentence
And more!' matches PCRE pattern "/^((?!Hello).)*$/s".


2) OutputRegexTest::testExpectNoHelloInMiddleFails
Failed asserting that 'This is Hello World!
Another sentence
And more!' matches PCRE pattern "/^((?!Hello).)*$/s".


3) OutputRegexTest::testExpectNoHelloAtEndFails
Failed asserting that 'A final Hello' matches PCRE pattern "/^((?!Hello).)*$/s".


FAILURES!
Tests: 4, Assertions: 4, Failures: 3.