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Coverage Criteria in Software Generation PDF-417 2d barcode in Software Coverage Criteria




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Coverage Criteria use software pdf-417 2d barcode generator toaccess pdf417 on software QR Code Overview A round trip pdf417 2d barcode for None path is a prime path of nonzero length that starts and ends at the same node. One type of round trip test coverage requires at least one round trip path to be taken for each node, and another requires all possible round trip paths. Criterion 2.

5 Simple Round Trip Coverage (SRTC): T R contains at least one round-trip path for each reachable node in G that begins and ends a round-trip path. Criterion 2.6 Complete Round Trip Coverage (CRTC): T R contains all roundtrip paths for each reachable node in G.

Next we turn to path coverage, which is traditional in the testing literature. Criterion 2.7 Complete Path Coverage (CPC): T R contains all paths in G.

Sadly, complete path coverage is useless if a graph has a cycle, since this results in an in nite number of paths, and hence an in nite number of test requirements. A variant of this criterion is, however, useful. Suppose that instead of requiring all paths, we consider a speci ed set of paths.

For example, these paths might be given by a customer in the form of usage scenarios. Criterion 2.8 Speci ed Path Coverage (SPC): T R contains a set S of test paths, where S is supplied as a parameter.

Complete path coverage is not feasible for graphs with cycles; hence the reason for developing the other alternatives listed above. Figure 2.7 contrasts prime path coverage with complete path coverage.

Part (a) of the gure shows the diamond graph, which contains no loops. Both complete path coverage and prime path coverage can be satis ed on this graph with the two paths shown. Part (b), however, includes a loop from n1 to n3 to n4 to n1 , thus the graph has an in nite number of possible test paths, and complete path coverage is not possible.

The requirements for prime path coverage, however, can be toured with two test paths, for example, [n0 , n1 , n2 ] and [n0 , n1 , n3 , n4 , n1 , n3 , n4 , n1 , n2 ].. Touring, Side trips, and Detours An important but subtle point to note is that while simple paths do not have internal loops, we do not require the test paths that tour a simple path to have this property. That is, we distinguish between the path that speci es a test requirement and the portion of the test path that meets the requirement. The advantage of separating these two notions has to do with the issue of infeasible test requirements.

Before describing this advantage, let us re ne the notion of a tour. We previously de ned visits and tours, and recall that using a path p to tour a subpath [n1 , n2 , n3 ] means that the subpath is a subpath of p. This is a rather strict de nition because each node and edge in the subpath must be visited exactly in the order that they appear in the subpath.

We would like to relax this a bit to allow. Graph Coverage n3 n1 n2 n1 n4 n3 Prime Path Software pdf417 s = { [n 0, n1, n3], [n0, n2, n3] } path (t1) = [n0, n1, n3] path (t2) = [n0, n2, n3] T1 = {t1, t2} T1 satisfies prime path coverage on the graph. n2 Prime Path s = { [n 0, n1, n2], [n 0, n1, n3, n4], [n1, n3, n4, n1], [n 3, n4, n1, n3], [n4, n1, n3, n4], [n 3, n4, n1, n2] } path (t3) = [n0, n1, n2] path (t4) = [n0, n1, n3, n4, n1, n3, n4, n1, n2] T2 = {t3, t4} T2 satisfies prime path coverage on the graph (b) Prime Path Coverage on a Graph with Loops.
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