Answer Posted / kunal

types of integeration testing:
top down
bottom up
Top down :
testing hierarchy starts from higher level
to lower level.if suppose testers dnt get the lower modules
for testing(consider the lower modules are under developmnt)
wat the testers wil do thy wil place dummy modules and
integerate these dummy modules with the higher level
modules.in top down apparoach the dummy modules r called
Stubs.
Stubs- Def
stubs r the dummy modules tht simulates the low
level modules.
Bottom up:
in this the dummy modules r called drivers.
Drivers- Def:
drivers r the dummy modules tht simulate the high



OR



Integration testing: carrying out integration tests.

Integration tests (After Leung and White) for procedural
languages. This is easily generalized for OO languages by
using the equivalent constructs for message passing. In
the following, the word "call" is to be understood in the
most general sense of a data flow and is not restricted to
just formal subroutine calls and returns ? for example,
passage of data through global data structures and/or the
use of pointers.

Let A and B be two components in which A calls B.
Let Ta be the component level tests of A
Let Tb be the component level tests of B
Tab The tests in A's suite that cause A to call B.
Tbsa The tests in B's suite for which it is possible
to sensitize A -- the inputs
are to A, not B.
Tbsa + Tab == the integration test suite (+ = union).

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