----- test_valid_imsi
 0: expect=false result=false imsi=''
 1: expect=false result=false imsi=' '
 2: expect=false result=false imsi='1'
 3: expect=false result=false imsi='123'
 4: expect=false result=false imsi='12345'
 5: expect=true result=true imsi='123456'
 6: expect=true result=true imsi='1234567'
 7: expect=true result=true imsi='1234567890123'
 8: expect=true result=true imsi='123456789012345'
 9: expect=true result=true imsi='000000000000000'
10: expect=true result=true imsi='999999999999999'
11: expect=false result=false imsi='1234567890123456'
12: expect=false result=false imsi='a23456789012345'
13: expect=false result=false imsi='1234567b9012345'
14: expect=false result=false imsi='12345678901234c'
15: expect=false result=false imsi='123456789 01234'
16: expect=false result=false imsi='1234567
123456'
17: expect=false result=false imsi='123456	123456'
18: expect=false result=false imsi='123456
123456'
----- test_valid_msisdn
 0: expect=false result=false msisdn=''
 1: expect=false result=false msisdn=' '
 2: expect=true result=true msisdn='1'
 3: expect=true result=true msisdn='123'
 4: expect=true result=true msisdn='12345'
 5: expect=true result=true msisdn='123456'
 6: expect=true result=true msisdn='1234567'
 7: expect=true result=true msisdn='1234567890123'
 8: expect=true result=true msisdn='123456789012345'
 9: expect=true result=true msisdn='000000000000000'
10: expect=true result=true msisdn='999999999999999'
11: expect=false result=false msisdn='1234567890123456'
12: expect=false result=false msisdn='a23456789012345'
13: expect=false result=false msisdn='1234567b9012345'
14: expect=false result=false msisdn='12345678901234c'
15: expect=false result=false msisdn='123456789 01234'
16: expect=false result=false msisdn='1234567
123456'
17: expect=false result=false msisdn='123456	123456'
18: expect=false result=false msisdn='123456
123456'