Isn't there DBA_ view to see the privileges granted to a role ?

Question

DB version :11.2
I couldn't find a DBA_ view which would list all the privileges granted to a role. Finally I had to grant the role to a user and then connect as that granted user and then query ROLE_TAB_PRIVS view. As a DBA , I can't login into business schemas to check this.
The scenario
==============
SCOTT schema has two tables : HRTB_EMP_MASTER and HELLOWORLD
I want to grant SELECT privileges on these two tables to another user called TESTUSER but not directly ; through roles
SQL> conn / as sysdba
Connected.
SQL> grant create role to testuser;
Grant succeeded.
SQL> conn testuser/test123
Connected.
SQL>
SQL> create role testuser_ro; 
Role created.
SQL> conn / as sysdba
Connected.
SQL> grant select on scott.hrtb_emp_master to testuser_ro;         --- > Granting the SELECT priv to the role first
Grant succeeded.
SQL> grant select on scott.helloworld to testuser_ro;               
Grant succeeded.
SQL> SELECT ROLE, OWNER, TABLE_NAME, PRIVILEGE FROM ROLE_TAB_PRIVS where owner = 'SCOTT';  ----> This won't work because I am connected as SYS
                                                          ----> ROLE_TAB_PRIVS is user specific view
no rows selectedSince I couldn't find a DBA view which will the privileges granted to a role , I granted the role to the user I had to login to the user (against our security policy) and query
ROLE_TAB_PRIVS.
SQL> grant testuser_ro to testuser;
Grant succeeded.
SQL> SELECT ROLE, OWNER, TABLE_NAME, PRIVILEGE FROM ROLE_TAB_PRIVS where owner = 'SCOTT';
no rows selected
SQL> conn testuser/test123
Connected.
SQL> SELECT ROLE, OWNER, TABLE_NAME, PRIVILEGE FROM ROLE_TAB_PRIVS where owner = 'SCOTT';
ROLE            OWNER           TABLE_NAME           PRIVILEGE
TESTUSER_RO     SCOTT           HELLOWORLD           SELECT
TESTUSER_RO     SCOTT           HRTB_EMP_MASTER      SELECT

Answer 1

you should search for grantee, not owner
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> create role r1;
Role created.
SQL> grant select on sys.v$database to r1;
grant select on sys.v$database to r1
ERROR at line 1:
ORA-02030: can only select from fixed tables/views
SQL> grant select on sys.v_$database to r1;
Grant succeeded.
SQL> select grantee, privilege, owner, table_name from dba_tab_privs where grantee='R1';
GRANTEE         PRIVILEGE                                OWNER           TABLE_NAME
R1              SELECT                                   SYS             V_$DATABASE