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4 Input Space Partitioning > 4.2 Combination Strategies Criteria

4.2 COMBINATION STRATEGIES CRITERIA

The above description ignores an important question: “How should we consider multiple partitions at the same time?” This is the same as asking “What combination of blocks should we choose values from?” For example, we might wish to require a test case that satisfies block 1 from q2 and block 3 from q3. The most obvious choice is to choose all combinations. However, just like Combinatorial Coverage from previous chapters, using all combinations will be impractical when more than 2 or 3 partitions are defined.

CRITERION 4.23 All Combinations Coverage (ACoC): All combinations of blocks from all characteristics must be used.

For example, if we have three partitions with blocks [A, B], [1, 2, 3], and [x, y], then ACoC will need the following twelve tests:


  

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