I will discuss schemes to test the nonclassical behaviour of gravity in the laboratory. By this I mean examining whether spacetime follows the fundamental postulates of quantum mechanics such as whether it can be quantum superposed, or whether it follows the measurement postulate of quantum mechanics. Three related approaches will be described. First, through gravitational entanglement generation between matter wave interferometers formed of large objects. The justification of this approach in proving the quantum nature of gravity will be described. In this context, I will elaborate on the experimental challenges. Secondly, the nonclassicality of gravity explored through measurements will also be described. Finally, I will describe a method of evidencing Bell-nonlocality of gravity which tests the fundamentally quantum nature of spacetime in a loophole free a device independent way.