Hi All,

Please suggest me
1) whether the Syntax Testing is White box testing or Black box testing.
2) Also, what is LCSAJ testing.

Regards
--Ashish

1) Syntax teting is power software testing technique for testing command driven softeware and similar application.


2) LCSAJ menas A Linear Code Sequence And Jump, consisting of the following three items (conventionally identified by line numbers in a source code listing): the start of the linear sequence of executable statements, the end of the linear sequence, and the target line to which control flow is transferred at the end of the linear sequence.

LCSAJ testing is a test case design technique for a component in which test cases are designed to execute LCSAJs.

An LCSAJ is defined as unbroken linear sequence of statements: (a) which begins at either the start of the program or a point to which the control flow may jump, (b) which ends at either the end of the program or a point from which the control flow may jump, (c) and the point to which a jump is made following the sequence.

LCSAJ coverage = I/L where: I = Number of LCSAJs exercised at least once. L = Total number of LCSAJs.

LCSAJs depends on the topology of a module's design and not just its semantics, they do not map onto code structures such as branches and loops. LCSAJs are not easily identifiable from design documentation. They can only be identified once code has already been written. LCSAJs are consequently not easily comprehensible.

Regards,
Sridevichitthu

Hi Sridevi,

Thanks for the answers given by u.
Now, its clear that LCSAJ Testing is white box testing. But I have a doubt regarding the Syntax testing, its difficult to infer whether ir is black box testing or the white box.
Please suggest.

Regards
Ashish Arora

Hi ashish,
syntax testing is blackbox testing.
Uses the syntax of the components inputs as the basis for the design of the testcase.

Hi hiashish12,

I read from on eof the link about Syntax testing ,Hope this would clarify your doubts

Syntax testing is a static,black box testing technique for protocol implementations.Beizer proposes that one specify the syntax for the Protocol in a convenient notation such as BNF( Backnus-Naur Form).Mutations are then made to the syntactic elements,and the modified grammar is used to produce aberrant test vectors.

Beizer suggests using an "Anti-parser" to compile the grammar to produce "Structured gargabe".He also suggests targeting one field of the input at a time at first,and then designing test cases with combinations of input.

As in other balck box testing technicques sysntax testing does not have a clear stopping criterion.Test Engineers have to use their experience,common sense or time/cost constriants while designing the test suite.

Thanks,
Sridevichitthu

Hi Sridevi,

Thanks for putting effort.

Regards,
Ganesh

hi Sridevi,

Now, I got the point, thanks for helping !!!

Regards
--Ashish

As I know Syntax and semantic errors are caught by developers during compilation or debugging.So, now I am confused, how Syntax Testing can be White box testing or Black box testing ;even, syntax checking is not a testing.

__________________
--
Brijesh Jain

Hi,
I think Syntax testing is a part of unit testing.
So this has to be done by the developer before the release or the build deployed to the QA Environment to further testing.

Syntax testing is black box testing and LCSAJ testing is Whitebox testing.

1) syntax testing is a strong black box testing technique. 2) lcsaj stands for liner codes sequence and jump which is a part of white box testing

thank u ppl..