public function testGetCapacity() { $capacity = $this->_storage->getCapacity(); $this->assertArrayHasKey('total', $capacity); $this->assertInternalType('numeric', $capacity['total']); $this->assertArrayHasKey('free', $capacity); $this->assertInternalType('numeric', $capacity['free']); $this->assertGreaterThanOrEqual($capacity['free'], $capacity['total'], "The total storage space must be greater or equal than the free space"); }