Micropost model definition
Basic test for Micropost model
Add test to validate the presence of user_id on Micropost model
Update the Annotations for micropost and user models
Create the @micropost object correctly in test suite
Verify that new micropost with an empty user_id raises a ActiveModel::MassAssignmentSecurity::Error
Remove attribute accessible user_id
Fix a little syntax mystake
Ass validation for a user association
Validate the presence of microposts in User model
Add the relantionships to user and microposts
Modified to can create microposts associated with a single  user
Lenght validation, default_scope_order and some comments
Dependent:destroy dependencie
Creation of micropost associated a user
Can't be blank and lenght test validations
Validate the order of microposts are displayed and validate the correct deleted of user's microposts