[8.x] Esql - rework date diff tests (#120328) #120408
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In preparation for adding nanosecond date support to date diff, this PR expands the test coverage and better integrates with the test generation framework. Using random data for date diff is extremely difficult, due to the vast range of units and the constraints of the integer return type. For example, nanosecond resolution differences of more than a couple of seconds will overflow the return value. So, instead of using a fully randomized dataset, I took the existing data set we were running against just the processing function, and formalized that to run against the whole test suite. It should be easy from here to add in cases for the same values as nanoseconds. I was able to integrate the overflow error case into the normal test framework, but the incorrect unit error doesn't play nicely with the framework (I believe this is because it fails in toEvaluator rather than in process, but I didn't dig in much). I've moved it to another test file so we don't run it for every case in the parameterized test file. --------- Co-authored-by: elasticsearchmachine <[email protected]>
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Backports the following commits to 8.x: