By Sagar Naik, Piyu Tripathy
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Extra info for Software Testing and Quality Assurance: Theory and Practice
Verify that the actual outcome is the expected outcome. 4. Use the veriﬁed actual outcome as the expected outcome in subsequent runs of the test case. ” Complete, or exhaustive, testing means there are no undiscovered faults at the end of the test phase. All problems must be known at the end of complete testing. For most of the systems, complete testing is near impossible because of the following reasons: • The domain of possible inputs of a program is too large to be completely used in testing a system.
Practitioners and researchers need to remove the boundaries between static and dynamic analysis and create a hybrid analysis that combines the strengths of both approaches . 4 VERIFICATION AND VALIDATION Two similar concepts related to software testing frequently used by practitioners are veriﬁcation and validation. Both concepts are abstract in nature, and each can be 8 CHAPTER 1 BASIC CONCEPTS AND PRELIMINARIES realized by a set of concrete, executable activities. The two concepts are explained as follows: • Veriﬁcation: This kind of activity helps us in evaluating a software system by determining whether the product of a given development phase satisﬁes the requirements established before the start of that phase.
These explanations focus on a single test case. • Identify an objective to be tested: The ﬁrst activity is to identify an objective to be tested. The objective deﬁnes the intention, or purpose, of designing one or more test cases to ensure that the program supports the objective. A clear purpose must be associated with every test case. 6 Different activities in program testing. 12 TESTING ACTIVITIES 15 • Select inputs: The second activity is to select test inputs. Selection of test inputs can be based on the requirements speciﬁcation, the source code, or our expectations.