PHPUnit_Framework_Assert::assertCount PHP Method

    public static function assertCount($expectedCount, $haystack, $message = '')
    {
        if (!is_int($expectedCount)) {
            throw PHPUnit_Util_InvalidArgumentHelper::factory(1, 'integer');
        }
        if (!$haystack instanceof Countable && !$haystack instanceof Traversable && !is_array($haystack)) {
            throw PHPUnit_Util_InvalidArgumentHelper::factory(2, 'countable or traversable');
        }
        static::assertThat($haystack, new PHPUnit_Framework_Constraint_Count($expectedCount), $message);
    }

 /**
  * @param CacheCollectedData[] $expectedCollectedData
  * @param CacheCollectedData[] $actualCollectedData
  */
 protected function assertCacheCollectedData(array $expectedCollectedData, array $actualCollectedData)
 {
     Assert::assertCount(count($expectedCollectedData), $actualCollectedData);
     foreach ($expectedCollectedData as $key => $expectedItem) {
         $this->assertSingleCacheCollectedData($expectedItem, $actualCollectedData[$key]);
     }
 }