what is incremental testing?

Answer Posted / riddhi

increamental testing is a way of integration testing in
which first you test each module of the software
indiviually then continue testing by adding another module
to it then another.
Its proper definition is "A integration testing strategy in
which you test subsystems in isolation, and then continue
testing as you integrate more and more subsystems".

Advantages of increamental testing:-
when you find a problem, you can find the defect more
easily because you have a better idea in which subsystem to
look

there are two types of increamental testing:-

1.Vertical increamental testing
under this there are two testing strategies

i)Bottom-up testing
In this you start by testing the very lowest levels of the
software using drivers, and then work upwards, as you
integrate successive layers

ii)Top-down testing
you start by testing only the user interface, with the
underlying functionality simulated by stubs, then you work
downwards, integrating lower and lower layers

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