test for name and email attributes
initial commit chapter 6
validate the presense of a name attribute
comment out a validation toensure a failing test
add codes for validation
validatin email format
test for the rejection of duplicate email address
test for the rejecion of duplicate email address,insensitive to case
validate the uniqueness of email address, ignore case
migrate to enforce email uniqueness
ensure email uniqueness
test for the password and password_confirmation attributes
test for the password and password_confirmation attributes
add test to validate password presense
test the case of  a mismatch
commenting out has_secure_password for the sake of TDD
complete implementation for secure passwords
Make a basic User model (including secure passwords)