Repeated-execution sweep: one query run with its parameters walked through null, finite, empty and infinite, and compiled queries #378

Problem

Every sweep runs each query once. EF Core caches the compiled query by its expression shape and sniffs some parameter values (a null parameter, an empty collection) when it builds the SQL, so a query that is right for the first value it sees can be reused for a value it no longer fits. No EF test project in this repository uses EF.CompileQuery or EF.CompileAsyncQuery.

Change

A sweep, RepeatedExecutionProbeTests (integration project, a database of its own). The same query objects run with a captured range, RangeSet and value set parameter walked through null → finite → empty → infinite → null and back, and with captured lists walked through empty → one element → duplicates → empty. Each execution is compared with memory over the loaded rows, with rule (c) for a null operand. The same queries also run as EF.CompileQuery and EF.CompileAsyncQuery delegates with the values passed as arguments. Disagreements go through Candidates.Verdict, naming the value sequence position.

Done when

Registered in test/oracles/oracles.json with a seed it is shown to catch; every disagreement is an issue and a candidates.json entry.