测试输出不包含文本

Question

我知道如何用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搜索内部字符串来做到这一点，但可能更好的方法是使用expectOutputString()以及正确的表达式。

该表达式应该如何构建？

Answer 1

你想要使用正则表达式，并做一个否定匹配，你必须使用lookahead断言语法。例如。测试的输出不包含“你好”：

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!"; 
    } 
} 

给出了这样的输出：

$ 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.