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EXPERTISE
- BLACK-BOX TESTING
- WHITE-BOX TESTING
- LOAD TESTING
- REGRESSION TESTING
- TEST AUTOMATION
- FUNCTIONAL TESTING
- WIRELESS TESTING
- COMPATIBILITY TESTING
SQA Lab's BlackBox Tests are designed to answer questions such as
- How is functional validity tested?
- What classes of input make good test cases?
- Is the system particularly sensitive to certain input values?
- How are the boundaries of data classes isolated?
- What data rates or volumes can the system tolerate?
- What effect will specific combinations of data have on system operation?
- Quality is the basic business principle for SQA Labs
- We Meet Our Customers Expectations and Keep them Happy
- We Deal with Honesty and Integrity
- We Provide the Highest Quality Products and Services
- We Have State of Art Facility with Highly Talented and Skilled Professionals
We view our Client relationship as a partnership. Our service strategy takes into account our Clients’ immediate, long-term needs while providing value to even the shortest of engagements. Every project is viewed as an opportunity to find solutions and improve our Clients workflow, as well as strengthen our business relationship with them.
TESTING SERVICES : BLACK-BOX TEST CENTER
What is BLACK BOX TESTING?:
Black box testing is testing that occurs from the viewpoint of an end user. Black box tests find bugs such as incorrect functions, interface problems, and database errors.
Black box testing implies that the selection of test data as well as the interpretation of test results are performed on the basis of the functional properties of a piece of software. Black box testing should not be performed by the author of the program who knows too much about the program internals.
Though centered around the knowledge of user requirements, black box tests do not necessarily involve the participation of users. Among the most important black box tests that do not involve users are functionality testing, volume tests, stress tests, recovery testing, and benchmarks.
Black box testing implies that the selection of test data as well as the interpretation of test results are performed on the basis of the functional properties of a piece of software. Black box testing should not be performed by the author of the program who knows too much about the program internals.
Though centered around the knowledge of user requirements, black box tests do not necessarily involve the participation of users. Among the most important black box tests that do not involve users are functionality testing, volume tests, stress tests, recovery testing, and benchmarks.
Major steps in doing BLACK BOX TESTING at SQA Labs :
The major steps in Black Box testing by SQA Labs are :
- We make the tests that are randomly generated with a distribution that corresponds to the expected usage of the program, then you can get a reliability estimate, such as MTBF, to use as an adequacy criterion (Clean room)
- Equivalence partitioning: divide possible test sets into equivalence classes, and run one test from each class
- Boundary value analysis: look for test cases on the boundaries of the equivalence classes
- Exhaustive testing: run every possible input (infeasible)
- Functional testing: construct tests directly from the requirements document
The advantages of SQA Lab's black box testing include:
- The designer and the tester are independent of each other.
- No need of knowledge of any specific programming languages
- The test is done from the point of view of the user, not the designer.
- Test cases can be designed from complete specification document
SQA Lab's Black Box Testing Techniques :
SQA Lab's expertise provides you with excellent Black Box testing and some of the testing techniques we use are:
- We make the tests that are randomly generated with a distribution that corresponds to the expected usage of the program, then you can get a reliability estimate, such as MTBF, to use as an adequacy criterion (Clean room)
- All boundary cases can be tested (top and bottom of specified range) to make sure the highest and lowest allowable inputs produce proper output
- Stress testing is performed (try to overload the program with inputs to see where it reaches its maximum capacity), especially with real time systems
- Crash testing is performed to see what it takes to bring the system down
- SQA Labs teams uses test monitoring tools whenever possible to track which tests have already been performed and the outputs of these tests to avoid repetition and to aid in the software maintenance
- Other functional testing techniques include: transaction testing, syntax testing, domain testing, logic testing, and state testing.
- Finite state machine models can be used as a guide to design functional tests
Black box testing . . . "You know the functionality"
- Given that you know what it is supposed to do, you design tests that make it do what you think that it should do.
- From the outside, you are testing its functionality against the specs/requirement.
- For software this is testing the interface :
» What is input to the system?
» What you can do from the outside to change the system?
» What is output from the system? - Tests the functionality of the system by observing its external behavior
- No knowledge of how it goes about meeting the goals.
