Compare the rule with concrete cases
Fictional marker count is format factor times content factor. Formats F1,F2,F3 use one,two,three; brief/full use one,two. There are six combinations. Testing each format once does not necessarily test both content choices for it. The matrix below records expected values, not executed results.
| Format / factor | Brief expected | Full expected | Cells |
|---|---|---|---|
| F1 / 1 | 1 | 2 | 2 |
| F2 / 2 | 2 | 4 | 2 |
| F3 / 3 | 3 | 6 | 2 |
Work through the distinction
Coverage is by full input tuple, not by whether every individual value appeared somewhere. A case identifier should include format and content together.
F1-brief, F2-brief and F3-full are prepared. How many of the six combinations are missing?
Show the worked answer
Three: F1-full, F2-full and F3-brief. Every format appeared, yet half the matrix is still missing.
Acceptance wording to adapt
Prepare one acceptance case for each of the three formats crossed with both content factors. Compare its expected marker count to format_factor×content_factor; report coverage by the six full tuples.