Answer / jp

Integration Testing: It is nothing but testing the
communication between the modules. It is done on the basis
of HLD (high level design )Document.

Top down Approach: It is nothing but, checking the
communication between the Main Module to the Sub module.

Example: If A, B & C are three Module, Assume A is the
main module and B, C are the sub modules. Checking the
communication from main module (A) to sub modules B & C are
nothing but Top down approach.

Stub: In above example..assume that, if Submodule B is
under construction. At that time, the Developer take the
help of a Temporary program (called as Stub) to check the
communication between the modules.

Bottom Up: It is, checking the communication between the
Sub Module to the Main module.

Driver: In above example..assume that, if Main module A is
under construction. At that time, the Developer take the
help of a Temporary program (called as Driver) to check the
communication between the modules.

Hope this will help...

Answer / sujana

Integration testing is nothing but to test whether all the
screen are integrated in correct order.
for ex:take yahoo mail
when i open the site login screen is to be appeared after
existing username and pwd it should direct me to mail box,
there if i click on sentmail it should display the sent
mails and again if i click on inbox from sent mail page it
should direct me to inbox only not to some other page and
from any page if i click back it should direct me to
previous page only like that we have to check the flow,
sequence of the screen is integration testing
stub means:
in a project the login screen is completed and the inbox
page is also completed sent mail and compose mail are yet to
complete then to test the integration we use a dummy page to
direct when click on the compose mail and sentmail links.
Driver means:
login page is yet to complete and compose mail ,inbox etc
are completed to check integration we use a dummy screen
with some meassage like under construction and a login
button, on clicking login button in that dummy screen it
drives to inbox page this is driver

Answer / hardik

Integration Test
Purpose:
To ensure that code is implemented and designed properly
to take unit tested modules and build a program structure that has been dictated by design
 IT only after UT
Combining the individual components to uncover errors associated with interfacing
Normally: Black box oriented
Doer: independent Test team
Tests interactions between two or more units or
components. Usually done by programmers.
Emphasizes interfaces.

Issues:
In what order are units combined?
How do you assure the compatibility and correctness of externally-supplied components?
How are units integrated? What are the implications of this order?

Top-down => need stubs; top-level tested repeatedly.
Bottom-up => need drivers; bottom-levels tested repeatedly.
Critical units first => stubs & drivers needed; critical units tested repeatedly.

What is Retesting?

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