def METHOD_NAME(self):
    dr = DescriptorRequest()
    nt.assert_equals(dr.data_location, "")
    dr.data_location = "first"
    nt.assert_equals(dr.data_location, "first")
    dr.data_location = "second"
    nt.assert_equals(dr.data_location, "second")
    dr.data_location = "42"
    nt.assert_equals(dr.data_location, "42")
    dr.data_location = ""
    nt.assert_equals(dr.data_location, "")