Class variables reset after every phpunit test

Question

In my PHPUnit tests, I have a test and a data provider which provide some integer values to test. And I'm doing some logical tests with them. After that I want to store all these integer values in a class-scope variable.

private $numbers = [];

/**
 * @dataProvider dp
 */
public function testOne($data)
{
    foreach($data as $n)
        array_push($this->numbers, $n);

    var_dump($this->numbers);
}
public function dp()
{
    return [
        "first" => [[1,2]],
        "second" => [[3,4]],
    ];
}

Output:

.array(2) {
  [0] =>
  int(1)
  [1] =>
  int(2)
}
.                                                                  2 / 2 (100%)array(2) {
  [0] =>
  int(3)
  [1] =>
  int(4)
}


Time: 9.71 seconds, Memory: 34.00Mb

As you see, it's appending first data set's values (1,2) to $numbers and when 2nd data set started to test, something resetting the array and $number becoming (3,4) . However I was expecting it will be (1,2,3,4).

Can you tell me why $numbers array is empty before second data set?

I don't have a tearDown() method.

php -v
PHP 5.6.14-1+deb.sury.org~precise+1 (cli) 
Copyright (c) 1997-2015 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2015 Zend Technologies
    with Zend OPcache v7.0.6-dev, Copyright (c) 1999-2015, by Zend Technologies
    with Xdebug v2.3.2, Copyright (c) 2002-2015, by Derick Rethans

phpunit --version
PHPUnit 5.0.4 by Sebastian Bergmann and contributors.

@Spudley :)) He / She removed down vote a few minutes later my comment, and then I removed my comment . Thank you. — Eray
– Eray, Commented Nov 8, 2015 at 21:53
Dunno if it's relevant but 'firsrt' and 'second' are keys pointing at an array within an array (trying ro say there's 2 sets of brackets) are you just passing dp()['first'] to testOne? — user5051310
– user5051310, Commented Nov 8, 2015 at 22:25
@Terminus I have to set array of array to get $data as an array. This is how data providers works. If i use one dimensional array, it will send 1 as first argument and 2 as second argument to testOne(). — Eray
– Eray, Commented Nov 8, 2015 at 22:30
Gotcha. So when you var_dump($data) in testOne you would only see 1 and than 2 and than 3 and than 4. — user5051310
– user5051310, Commented Nov 8, 2015 at 22:54

Tim Bezhashvyly · Accepted Answer · 2015-11-12 07:11:51Z

4

You need to declare your property as static:

private static $numbers = [];

/**
 * @dataProvider dp
 */
public function testOne($data)
{
    foreach($data as $n)
        array_push(self::$numbers, $n);

    var_dump(self::$numbers);
}

public function dp()
{
    return [
        "first" => [[1,2]],
        "second" => [[3,4]],
    ];
}

answered Nov 12, 2015 at 7:11

Tim Bezhashvyly

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