How would you conduct a test: top-down or down-top? What is it? Which one is better?

Down-Top: unit -> interface -> system. Top-Down is a vice versa. You may use both, but down-top allows to discover malfunctioning at earlier phases of development and cheaper to fix than in the case of top-down.
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Priscilla

  • Aug 21st, 2006
 

Integration testing means testing the whole application,mainly checking the interface and data flow. There are two types of integration testing.

1.Incremental Testing

2.Non-Incremental Testing

Again the Incremental Testing is divided into two types.

1.Top-Down Testing

2.Bottom-Up Testing

Non-Incremental Testing comes under Big bang model where we combine all the modules and test.

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Narender Reddy

  • Apr 6th, 2007
 

This concept comes in the integration testing the perpouse of integration testing is combing deffirant modules in our project and cheek the funcationality

In top - down approach testing is conducted from main moduel to sub moduel

In bottom - up appoch testing is conducted from submoduel to main moduel
 
assume that your project has three modules

example for top - down 
m1 -> m2 -> m3 etc
 
bottom - up 

m3 -> m2 -> m1 

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kumudbajaj

  • Sep 14th, 2007
 

Bottom-up and Top-Down are used in performing incremental integration testing.
In Bottom-up we start the testing from the terminal module (that do not call any other sub module), a driver is produced for every module. Next module to be tested is any module who has previously tested sub ordinate module.
In Top-Down we start the testing from the top most module, a stub is produced for every module. Next module to be tested is any module who has preveously tested super ordinate module.

G.Raghevender

  • Oct 15th, 2007
 

top down and down top are both comes under the integration testing.


Top-down:

It means core modules are designed and tested first ,after that proceeding to other modules.

Here we can replace a module with dummy modules called stubs.


Down-top:

Here base modules are designed and tested first and proceeds to other modules .

here we can use dummy connections b/w different modules called  Drivers.

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Prabhat

  • Nov 6th, 2007
 

Are you sure these are integration approach rather than testing appoach

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