脚本可以很好地分离，但在测试中会出错

Question

编辑

不，我的问题在那里没有得到回答。我确实看过这个问题，但这并不能解决我的问题。我知道错误的含义，但我不知道为什么在这种情况下，脚本本身可以正常运行。

我要达到什么目的？

我做了一个小脚本，可以打开一个文本文件，用一行删除它。

$file = fopen("trainees.txt", "r+") or die("Unable to open file!");

    $lines = file('trainees.txt', FILE_IGNORE_NEW_LINES);
    $nl = count($lines);
    $randIndex = rand(0,$nl-1);

    $creds = $lines[$randIndex];

    foreach ($lines as $line){
        if ($line == $creds){
            unset($lines[array_search($creds,$lines)]);
            file_put_contents("trainees.txt", implode("\r\n", 
                           $lines));
        }
        echo $line.'<br>';
    }
fclose($file);
echo '<br><br><br><br><br><br>';
echo $creds;

这在完全独立的php文件中可以正常工作。但是，一旦我将其粘贴到测试中，它就会给我这个错误：

1) FirstCest: Login successfully
 Test  tests\acceptance\FirstCest.php:loginSuccessfully

  [PHPUnit\Framework\Exception] Undefined offset: 0

#1  D:\Programas\xampp\htdocs\robo2\tests\acceptance\FirstCest.php:50
#2  FirstCest->loginSuccessfully
Artifacts:

Png: D:\Programas\xampp\htdocs\robo2\tests/_output\FirstCest.loginSuccessfully.fail.png
Html: D:\Programas\xampp\htdocs\robo2\tests/_output\FirstCest.loginSuccessfully.fail.html

ERRORS!
Tests: 1, Assertions: 0, Errors: 1.

您可以看到错误来自$creds = $lines[$randIndex];行 该索引应该存在，所以我不知道为什么会收到此错误。 这是文本文件：

008C108:8706405
108C408:1776723
008B108:9315051
008BD08:4357300
008BF08:4235645
008C308:8571541
008B008:7139762
008BB08:8942468
008BC08:6648592
6648592:8504197
008C608:6219682
008AE08:2728576
008AF08:9407850

这是我的整个测试文件：

// test
    public function loginSuccessfully(AcceptanceTester $I)
    { 

        //Times to answer questions

        $nq = 8;
        $lexam = 10;        //minutes
        $lexamVariation = 0.07;

        $lexam1 = round($this->__rand_float($lexam - ($lexam * $lexamVariation), $lexam * ($lexamVariation + 1)),4);
        $tquest = $lexam1 / $nq;
        $times = [];

        for ($i=$nq; $i > 0; $i--) { 
             $tquest1 = $this->__rand_float($tquest * 0.5,$tquest*1.5,50) *60;
             array_push($times,$tquest1);
            }
    //echo 'total time (sec)= '.array_sum($times).'<br>';
    //echo 'total time (min)= '.array_sum($times) /60;


        //picks an user
        $file = fopen("trainees.txt", "r+") or die("Unable to open file!");

        $lines = file('trainees.txt', FILE_IGNORE_NEW_LINES);
        $nl = count($lines);
        $randIndex = rand(0,$nl - 1);

        $creds = $lines[$randIndex];

        foreach ($lines as $line){
            if ($line == $creds){
                unset($lines[array_search($creds,$lines)]);
                file_put_contents("trainees.txt", implode("\r\n", $lines));
            }
        }
        fclose($file);        




        $user = $trainees[rand(0,count($trainees))];

        $credentials = explode(':',$user,2);

        unset($trainees[$user]);


        $I->amOnPage('');

        $I->waitForElementClickable('//*[@id="submitLogin"]');
        $I->fillField('username',$credentials[0]);
        $I->fillField('password',$credentials[1]);
        $I->click('//*[@id="submitLogin"]');

        //preliminaries
        $I->waitForElementClickable('//*[@id="Proceed"]');
        $I->click('//*[@id="Proceed"]');

        $I->waitForElementClickable('//*[@id="pCheckbox"]/span');
        $I->click('//*[@id="pCheckbox"]/span');

        $I->waitForElementClickable('//*[@id="Proceed"]');
        $I->click('//*[@id="Proceed"]');

        $I->waitForElementClickable('//*[@id="Proceed"]');
        $I->click('//*[@id="Proceed"]');

        $I->waitForElementClickable('//*[@id="pCheckbox"]/span');
        $I->click('//*[@id="pCheckbox"]/span');

        $I->waitForElementClickable('//*[@id="Proceed"]');
        $I->click('//*[@id="Proceed"]');

        $I->waitForElementClickable('//*[@id="Proceed"]');
        $I->click('//*[@id="Proceed"]');


        $I->waitForElementClickable('//*[@id="pCheckbox"]/span');
        $I->click('//*[@id="pCheckbox"]/span');

        $I->waitForElementClickable('//*[@id="Proceed"]');
        $I->click('//*[@id="Proceed"]');


        //start exam
        $I->waitForElementNotVisible('//*[@id="oleWaitMessage"]', 200);



        for ($q=count($times) - 1; $q > 0 ; $q--) { 
            $I->waitForElementClickable('//*[@id="rb_0"]');
            $I->wait($times[$q]);
            $I->click('//*[@id="rb_'.rand(0,2).'"]');
            $I->waitForElementClickable('//*[@id="oleNextItemBtn"]');
            $I->click('//*[@id="oleNextItemBtn"]');
        }
        //last question
        $I->waitForElementClickable('//*[@id="rb_0"]');
        $I->wait($times[$q]);
        $I->click('//*[@id="rb_'.rand(0,2).'"]');

        //submits
        $I->waitForElementClickable('//*[@id="oleSubmitBtn"]');
        $I->wait(2);
        $I->click('//*[@id="oleSubmitBtn"]');

        $I->waitForElementClickable('//*[@id="yui-gen0-button"]');
        $I->wait(2);
        $I->click('//*[@id="yui-gen0-button"]');


    }
}