[SebHenn]

The cifail side of dotnet-tia#75. The dotnet-tia side is dotnet-tia#83.

What it adds

cifail selection-misses --tia <report.json> <test reports...> names the failing tests that dotnet-tia's selection had skipped on the pull request: candidate selection misses.

• Core: CiFail.Core.Analysis.SelectionMisses is pure, and has its own tests.
  • It reads the dotnet-tia report and refuses one that isn't schema 1, or was written without --report-skipped, saying how to write one.
  • It matches a failure at method level, with a parameterised case's arguments dropped. JUnit's classname + name are joined. A bare method name (TRX from MSTest) matches only when exactly one skipped test ends with it.
  • It reports each test once, even when two frameworks failed it.
• CLI: SelectionMissesCommand.
  • Files, directories and globs go through AnalysisInputs, like analyze.
  • A non-report input (a results directory has the runner's log beside the TRX) is skipped with a warning on stderr. Input containing no report at all is a usage error, never "no miss".
  • Exit 0/1/2 follow the existing Ok/Negative/Usage. --json prints {tia, failingTests, misses[]}.
• Docs: a README section, and a changelog entry under Unreleased. No release here.

End to end

I ran this against dotnet-tia's fixture solution:

1. dotnet tia analyze --report r.json --report-skipped on a change to Calculator.Add. It skipped 7 of 9 xUnit tests and all 3 NUnit tests.
2. I broke Subtract and ran the xUnit project with --report-trx.
3. cifail selection-misses --tia r.json <trx dir> named Fixtures.Tests.CalculatorTests.Subtracts (Fixtures.Tests) with its assertion message, warned about the .log in the directory, and exited 1.

Tests

• New SelectionMissesTests (Core, 13).
• New SelectionMissesCommandTests (CLI, 7).
• selection-misses is added to HelpTests.
• Suites: Core 514/514, Cli 195/195, Server 63/63, before the warning change. The CLI class was re-run after it: 7/7.

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