Sql server 2012 grant role permission to just validate view but not select data from it
Is there a permission in SQL server 2012 to just validate/ existence
  an object (in my case it's a view) but not a select permission?


Consider granting VIEW DEFINITION  permission as defined in the below quoted reference; this still applies to SQL Server 2012 as well.


  VIEW DEFINITION
  
  The VIEW DEFINITION permission lets a user see the metadata of the
  securable on which the permission is granted. However, VIEW DEFINITION
  permission does not confer access to the securable itself. For
  example, a user that is granted only VIEW DEFINITION permission on a
  table can see metadata related to the table in the
  sys.objects
  catalog view. However, without additional permissions such as SELECT
  or CONTROL, the user cannot read data from the table. For more
  information about viewing metadata, see GRANT
  (Transact-SQL).




Creating a per Database Role for VIEW DEFINITION permissions

/* CREATE A NEW ROLE  -- View Definition */
-- Database specific
CREATE ROLE db_All_ViewDefinition
GRANT VIEW DEFINITION TO db_All_ViewDefinition


Members of this role in the database you create it on should only have access to the applicable metadata as long as they don't have other permissions to database objects such as explicit SELECT access to the a table or a member of the db_datareader fixed database role.



Granting VIEW DEFINITION permissions explicitly per object

USE [DatabaseName];
GRANT VIEW DEFINITION ON dbo.tablename
TO [domain\username]


The above TSQL will grant explicit VIEW DEFINITION access to the specific DB object and to the specific security principal as specified in the applicable TSQL logic



Further Resources


GRANT Object Permissions (Transact-SQL)
CREATE ROLE (Transact-SQL)
VIEW DEFINITION