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What Is Combinatorial Interaction Testing

For higher strengths, there was a statistical draw between both approaches. An explanation for the fact that IPOG-F is better than TTR 1.2 is that TTR 1.2 ends up making more interactions than IPOG-F. In general, we might say that efficiency of IPOG-F is better than TTR 1.2 which influenced the cost-efficiency result. However, if we look at cost in isolation for all strengths, the average value of the test suite size generated via TTR 1.2 (734.50) is better than IPOG-F (770.88). After calculating the parameters interactions, Φ, the initial solution, and the goals of all test cases of M, Main selects the parameter interaction that has the highest amount of uncovered t-tuples (line 2) and constructs t-tuples so that they can be reallocated.

In addition to the discussion of the implementation of combinatorial testing techniques in video game testing, we present a method for finding combinations resulting in video game bugs. Threats to population refer to how significant is the selected samples of the population. For our study, the ranges of strengths, parameters, and values are the determining points for this threat.

Combinatorial Testing Approach for Cloud Mobility Service

Tests for the validation of BenCIGen are derived from its requirements by using a combinatorial interaction approach. Moreover, we demonstrate the tool’s ability to generate benchmarks that reflect the characteristics of real software systems. BenCIGen not only facilitates the evaluation of existing generators but also serves as a valuable resource for researchers and practitioners seeking to enhance the quality and effectiveness of combinatorial testing methodologies. Thinking about the testing process as a whole, one important metric is the time to execute the test suite which eventually may be even more relevant than other metrics. Hence, we need to run multi-objective controlled experiments where we execute all the test suites (TTR 1.1 × TTR 1.2; TTR 1.2 × other solutions) probably assigning different weights to the metrics. We also need to investigate the parallelization of our algorithm so that it can perform even better when subjected to a more complex set of parameters, values, strengths.
What is combinatorial interaction testing
In Section 3, we show the main definitions and procedures of versions 1.1 and 1.2 of our algorithm. Section 4 shows all the details of the first controlled experiment when we compare TTR 1.1 against TTR 1.2. In Section 6, the second controlled experiment is presented where TTR is confronted with the other 5 greedy tools. In Section 8, we show the conclusions and future directions of our research. Three versions of the TTR algorithm were developed and implemented in Java. Version 1.0 is the original version of TTR (Balera and Santiago Júnior 2015).

Industrial Case Studies – Combinatorial and Pairwise Testing

The primary aim of this study is to evaluate cost and efficiency related to CIT test case generation via versions 1.1 and 1.2 of the TTR algorithm (both implemented in Java). The rationale is to perceive whether we have significant differences between the two versions of our algorithm. After all combinations between t-tuples and test cases are made, that is, when procedure ends, the new ζ is calculated. Thus the steps described above are repeated with the insertion/reallocation of t-tuples into the matrix M. Once an uncovered t-tuple of Θ is included in M and meets the goal, that t-tuple is excluded from Θ (line 7). Note that if t-tuple does not allow the test to which it was combined to reach the goal, it is “unbound” (line 9) from this test case so that it can be combined with the next test case.
What is combinatorial interaction testing
The pairwise test cases, generated by Microsoft’s “pict” tool, are shown below. We can’t do exhaustive testing, but the interaction rule says we don’t have to, within reason; we can still provide very strong assurance by testing all 4-way to 6-way combinations. Multiple studies have found 4-way to 6-way combination coverage was able to detect all faults found with exhaustive testing. Thus we can refer to this type of testing as “effectively exhaustive” (within reason). JMB worked in the definitions and implementations of all three versions of the TTR algorithm, and carried out the two controlled experiments.

TTR: a new algorithm for combinatorial interaction testing

Moreover, the algorithm performs exhaustive comparisons within each horizontal extension which may cause longer execution. On the other hand, TTR 1.2 only needs one auxiliary matrix to work and it does not generate, at the beginning, the matrix of t-tuples. These features make our solution better for higher strengths (5, 6) even though we did not find statistical difference when we compared TTR 1.2 with our own implementation of IPOG-F (Section 6.4).
What is combinatorial interaction testing
However, it is not entirely clear whether the IPOG algorithm (Lei et al. 2007) was implemented in the tool or if another approach was chosen for t-way testing. In our empirical evaluation, TTR 1.2 was superior to IPO-TConfig not only for higher strengths (5, 6) but also for all strengths (from 2 to 6). Moreover, IPO-TConfig was unable to generate test cases in 25% of the instances (strengths 4, 5, 6) we selected. In this section, we present a second controlled experiment where we compare TTR 1.2 with five other significant greedy approaches for unconstrained CIT test case generation.

VASJ worked in the definitions of the TTR algorithm, and in the planning, definitions, and executions of the two controlled experiments. Regarding the metrics, cost refers to the size of the test suites while efficiency refers to the time to generate the test suites. Although the size of the test suite is used as an indicator of cost, it does not necessarily mean that test execution cost is always less for smaller test suites. However, we assume that this relationship (higher size of test suite means higher execution cost) is generally valid. We should also emphasize that the time we addressed is not the time to run the test suites derived from each algorithm but rather the time to generate them.

  • For example, in pairwise testing, the degree of interaction is two, so the value of strength is 2.
  • This paper presented a novel CIT algorithm, called TTR, to generate test cases specifically via the MCA technique.
  • Algorithms/tools were subjected to each one of the 80 test instances, one at a time, and the outcome was recorded.
  • To detect interaction failures, software developers often use “pairwise testing”, in which all possible pairs of parameter values are covered by at least one test.

In version 1.1 (Balera and Santiago Júnior 2016), we made a change where we do not order the input parameters. In the last version, 1.2, the algorithm no longer generates the matrix of t-tuples (Θ) but rather it works on a t-tuple by t-tuple creation and reallocation into M. The study of protein-protein interactions (PPIs) and the engineering of protein-based inhibitors often employ two distinct strategies. One approach leverages the power of combinatorial what is combinatorial testing libraries, displaying large ensembles of mutant proteins, for example on the yeast cell surface, to select binders. Another approach harnesses computational modeling, sifting through an astronomically large number of protein sequences and attempting to predict the impact of mutations on PPI binding energy. Individually, each approach has inherent limitations, but when combined, they generate superior outcomes across diverse protein engineering endeavors.

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