Creating Test Class to Cover RecordType

Hello 
I have come across many times this question how to cover record type in test class,This made me to share in 
my blog.Here is the code you can refer
for example :
let say we have two Contact Record Types PrimaryContact and BusinessContact.
Now  we can create Contact record by using these recordtype  such as PrimaryContact  or BusinessContact .
There are two different approach.

First Approch

 We normally query like this . 

    RecordType rt = [SELECT id,Name 
                             FROM RecordType 
                             WHERE SobjectType='Contact ' AND Name='PrimaryContact '];
And now use this value further while creating the Contact Record.

   Contact con = new Contact (Name='TestConatct' , recordTypeId=rt.id);
   INSERT con;

Second Approach
We can do this in other way without query.

     Schema.DescribeSObjectResult cfrSchema = Schema.SObjectType.Contact; 
     Map<String,Schema.RecordTypeInfo> ContactRecordTypeInfo
                   = cfrSchema.getRecordTypeInfosByName(); 
Now to get the recordTypeId we will have to use a method getRecordTypeId. 

    Id rtId = ContactRecordTypeInfo.get('PrimaryContact ').getRecordTypeId(),
Now we can insert Contact Record like 

   Contact con = new Contact (Name='TestConatct',recordtypeid = rtId );
   INSERT con;