function testCreationOfSnapShots()
{
$this->assertEmpty(self::$initSnap->timePassed());
$this->assertNotEmpty(self::$initSnap->numClassesDeclaredSincePreviousSnapshot());
$this->assertNotEmpty(self::$initSnap->numFilesIncludedSincePreviousSnapshot());
usleep(100);
$snapShot = new PerformanceSnapshot(self::$initSnap);
$this->assertNotEmpty($snapShot->timePassed());
$bytes = str_repeat('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa', 10000);
$snapShot = new PerformanceSnapshot(self::$initSnap);
$this->assertNotEmpty($snapShot->memoryAllocationDifference());
}
/**
* @param \Closure $func
* @param string $desc
* @return TestRunResult
*/
private function runFunction($func, $desc)
{
$initSnapShot = new PerformanceSnapshot();
for ($i = $this->numRuns; $i > 0; $i--) {
$func();
}
$snapShot = new PerformanceSnapshot($initSnapShot);
return new TestRunResult($desc, $snapShot->timePassed(), $snapShot->memoryAllocationDifference());
}