Expands tests for Snp model
Expands tests for Snp model

Signed-off-by: Vivek Rai <4b8b65dd320e6035df8e26fe45ee3876d9e0f96b@gmail.com>

vivekiitkgp/snpr,vivekiitkgp/snpr,vivekiitkgp/snpr,vivekiitkgp/snpr