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文件操作類 file.class.php

    <?php
    class File
    {
        var $filename;
       
        function File($file)
        {
            if (emptyempty($file)) {
                die('Filename should not be empty');
            }
           
            $this->filename = $file;
           
            if (!$this->exists() && !$this->create())   die('Unable to find / create the file');
        }
       
        function exists()
        {
            return file_exists($this->filename);
        }
       
        function create()
        {
            if ($this->exists())    return true;
            return $this->putContents(null);
        }
       
        function getContents()
        {
            return @file_get_contents($this->filename);
        }
       
        function putContents($content)
        {
            $fp = @fopen($this->filename， 'wb');
            $write = @fwrite($fp， $content);
            @fclose($fp);
           
            return !($write === false);
        }
       
        function append($content)
        {
            $fp = @fopen($this->filename， 'ab');
            $append = @fwrite($fp， $content);
            @fclose($fp);
           
            return !($append === false);
        }
       
        function delete()
        {
            return @unlink($this->filename);
        }
    }
    ?>

單元測試類 fileTest.php

    <?php
    //include_once '../simpletest/unit_tester.php';
    //include_once '../simpletest/reporter.php';
    include_once('../simpletest/autorun.php');
    include_once 'file.class.php';
    class fileTest extends UnitTestCase
    {
        var $file;
        var $filename;
       
        function fileTest($filename)
        {
            $this->filename = $filename;
            $this->file = new File($this->filename);
            $this->UnitTestCase('File Manipulation Test');
        }
       
        /**
         * 描述：該函數將會在每次測試開始前自動調用，
         * 在編寫測試類的時候，是個可選函數，可寫不可不寫
         */                            
        function setUp()
        {
            $fp = @fopen($this->filename， 'x');
            if (!($fp == false)) {
                fwrite($fp， '');
                fclose($fp);
            }
        }
       
        /**
         * 描述：該函數將會在每次測試結束后自動調用，
         * 在編寫測試類的時候，是個可選函數，可寫不可不寫
         */ 
        function tearDown()
        {
            @unlink($this->filename);
        }
       
        function testFileExists()
        {
            $this->assertTrue($this->file->exists());
            clearstatcache();
            $this->assertTrue(file_exists($this->file->filename));
        }
       
        function testCreate()
        {
            $this->tearDown();
            $this->assertFalse(file_exists($this->file->filename));
            clearstatcache();
           
            $this->assertTrue($this->file->create());
            $this->assertTrue(file_exists($this->file->filename));
        }
       
        function testReadWrite()
        {
            $contents = 'content';
            $this->assertTrue($this->file->putContents($contents));
            $this->assertEqual($this->file->getContents()， $contents);
        }
       
        function testAppend()
        {
            $this->file->putContents('SimpleTest');
            $this->assertTrue($this->file->append('NeverMind'));
            $this->assertWantedPattern('~nevermind$~i'， $this->file->getContents());
        }
       
        function testDelete()
        {
            $this->assertTrue($this->file->delete());
            $this->assertFalse(file_exists($this->filename));
        }
    }
    $test = new fileTest('test.txt');
    $test->run(new HtmlReporter());
    ?>