public void GetDetailsWhenNotNullDrugName() { config.Setup(p => p.searchDrugsByName("Disprin")).Returns(new List <LocationWiseDrug> { new LocationWiseDrug() { } }); var result = TokenObj.searchDrugsByName("Disprin"); var rs = result as OkObjectResult; var rs1 = rs.Value as List <LocationWiseDrug>; Assert.That(rs1, Is.Not.Empty); }