Improve failure message of RowCountPrecondition to preserve expected row count

[martinspielmann]

Impact

• Bug fix (non-breaking change which fixes expected existing functionality)
• Enhancement/New feature (adds functionality without impacting existing logic)
• Breaking change (fix or feature that would cause existing functionality to change)

Description

The existing failure message for RowCountPrecondition will always tell Table [NAME] is not empty., even if there is an expected row count greater than zero.

E.g. you set expectedRows to 5 and your table has 10 rows, you'll get the following failure message, which is somehow misleading, because you do not expect to have an empty table at all:
Table [NAME] is not empty.

The change updates the error message to be more specific and contain the expectedRows:
Table [NAME] does not have the expected row count of 5.

Things to worry about

• I'm afraid this very small change changes the method signature of getFailureMessage, so classes extending from RowCountPrecondition may in fact break if they did override this method.

[github-actions]

Unit Test Results

  4 620 files  ±0    4 620 suites  ±0   35m 47s ⏱️ + 1m 37s
  4 594 tests ±0    4 375 ✔️  - 4     219 💤 +4  0 ❌ ±0 
54 300 runs  ±0  49 276 ✔️  - 4  5 024 💤 +4  0 ❌ ±0 

Results for commit 0a4c5f6. ± Comparison against base commit 28631d9.

[nvoxland]

Code review and test results:

Things to be aware of:

• Change makes sense to me
• No test, but I can't think of a useful test to add at this point
• I'm OK with the minor API change

Things to worry about:

• Nothing

[FBurguer]

Precondition work as expected, it shows how many rows you have vs expected rows. If it doesnt match, changset its not executed/warns you (depends on how you set up the precondition).