When I run PHPUnit, it appears to me as if it had a memory-leak when running many tests inside a single test class. But I don't know if this is a bug or it was the expected behaviour.
To reproduce:
- I create a simple testHello() with a silly assertTrue(true).
- I feed it from providerHello(). Just feeding 3 dummy params.
- With
$numberOfTests = 1;, consumed memory is 5.75MB.- PHPUnit output =
Time: 0 seconds, Memory: 5.75Mb
- PHPUnit output =
- With
$numberOfTests = 10000;, I don't expect the memory to grow so much, just the size of the new array. But the used memory is 99.75MB which I feel it is too much.- PHPUnit output =
Time: 4 seconds, Memory: 99.75Mb
- PHPUnit output =
- I added a dirty echo() in the provider, just to know how much memory the array made the script to consume.
- With 1 test:
Memory = 5294552(5.2MB) - With 10.000 tests:
Memory = 15735352(15.7MB)
- With 1 test:
The questions:
- Why do I loose 84MB in the way? (99.75 really consumed - 15.75 really used by the array)
- Is it hormal that it allocates memory at each iteration, probably its internal setUp(), but does not free the same amount at the internal tearDown()?
- Am I doing anything wrong?
My version:
phpunit --version gives PHPUnit 3.6.10 by Sebastian Bergmann..
This is the code:
<?php
class DemoTest extends \PHPUnit_Framework_TestCase
{
/** @dataProvider providerHello */
public function testHello( $a, $b, $c )
{
$this->assertTrue( true );
}
public function providerHello()
{
$numberOfTests = 10000;
$data = array();
for( $i = 0; $i < $numberOfTests; $i++ )
{
$data[] = array( 1, 2, 3 );
}
echo( "Memory = " . memory_get_peak_usage() . PHP_EOL );
return $data;
}
}
?>
