Test strategy & test coverage

What is test strategy?

A Test Strategy document is a high level document and normally developed by project manager. This document defines “Testing Approach” to achieve testing objectives. The Test Strategy is normally derived from the Business Requirement Specification document.
The Test Stategy document is a static document meaning that it is not updated too often. It sets the standards for testing processes and activities and other documents such as the Test Plan draws its contents from those standards set in the Test Strategy Document.


Components of the Test Strategy document

• Scope and Objectives
• Business issues
• Roles and responsibilities
• Communication and status reporting
• Test deliverability
• Industry standards to follow
• Test automation and tools
• Testing measurements and metrices
• Risks and mitigation
• Defect reporting and tracking
• Change and configuration management
• Training plan

What is test plan ?

he Test Plan document on the other hand, is derived from the Product Description, Software Requirement Specification SRS, or Use Case Documents.
The Test Plan document is usually prepared by the Test Lead or Test Manager

• Test Plan id
• Introduction
• Test items
• Features to be tested
• Features not to be tested
• Test techniques
• Testing tasks
• Suspension criteria
• Features pass or fail criteria
• Test environment (Entry criteria, Exit criteria)
• Test delivarables
• Staff and training needs
• Responsibilities
• Schedule

SIP - Chapter 1

1. SIP Request/Responses list:

SIP is a protocol which uses text format to send and receive request & response messages.

There are 6 basic request/Method types: (Note: Requests or Methods are same)

Request Types:

INVITE - This message is send by the UAC (User A) to UAS (Proxy)  or other UAC  (User B) to start a session with the User B

ACK - Message send by the UAC (User A) to UAC  (User B) for the 200 OK Response Message.

BYE - Ends a session send by any UAC (User A or User B)

CANCEL - Cancels establishing the session 

OPTIONS - Communicates information about the capabilities of the calling and receiving SIP phones

REGISTER - UAC registers his own ip address & URL with the registrar server.

Response Types:

SIP Requests are answered with SIP responses, of which there are 6 classes:

1xx = informational responses, such as 180, which means ringing
2xx = success responses
3xx = redirection responses
4xx = request failures
5xx = server errors
6xx = global failures

What is difference between dialog, Transaction & session in SIP? What are the parameters used to identify the dialog, transaction & Sessions?

Dialog - Dialog is identified by the CALL-ID, FROM and To Tag fields.

What are the minimum headers required for a SIP Request message?

Max-Forwards, To, From, Call-ID and CSeq headers are required.

What is Max-Forwards header field?

The

is initialized to some large integer and decremented by each SIP server, which

receives and forwards the request, providing simple loop detection.Max-Forwards header field, which
What is From and To Header?

To

originator and destination of the SIP request. When a name label is used, as in

this example, the SIP URI is enclosed in brackets and used for routing the

request. The name label could be displayed during alerting, for example, but is

not used by the protocol.and From header fields, which show the

SIP tutorial, FAQs, Knowledge can be shared here.

Links to download the SIP documents

a) RFC 3261 - This is the basic RFC to start with

Download link - http://www.ietf.org/rfc/rfc3261.txt


b) SIP Johnston - Really good one with basics

Download link

 http://www.filestube.com/a1332364f51f9e9803e9,g/a-b-johnston-sip-understa.html