1.Blub will glow in normal.
2.Blub will glow with low volatge.
3.Blub will glow with high volatge.
4.Blub will glow with very high volatge and burn

1.Conditional Specification:Mentioned Dark Room.
2.Swith Board:"Press" Bulb  glows.

Basis paths coverage to implement a successful glow of bulb 
while switch is Pressed
1.Bulb is existed.

Pre-Requirement.
To make the test case criteria :pass/fail in a dark room 
search for the switch board.
The approach u make to find is heuristic search.

Test Case         Action                     Expected  

Switch On         "Press"Switch             Bulb glows

Electricity should be there.
Bulb should be there.
Connection between bulb and switch.
Working condition of the switch.

HI

pre_Requeste: Make Sure The Switch Board Exists.

 Test Data: "Switch on The Press Button".

 Test Action: 1.Test Procedure: Find the switch Board & 
press the Bitton.
              2.Test Description:  check Whether the Light 
Glows.

 Test Exp Result : The Light should Glow.
 
S.Ramprasad. Sun_ramprasad@yahoo.com

 Test Avl Result :

I think we can write positive and negative also

1. Switch on the light and light should glow

2. Switch off the light and it should off

3. Switch on another button light should not glow(we can do 
the same with other switches also)

4. Now switch on the first button again another light 
should not glow (if it is there)