#2229 Surface empty BCPT results as a warning instead of silent success

When BCPT performance tests produce a results file with no entries, GetBcptSummaryMD now returns a message that appears in the GitHub step summary instead of an empty string. A missing results file still yields an empty summary.

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1AL files

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Pull request · merged into main on 2026-07-22 by jeffreybulanadi · 2 files (+38 -1), 1 AL · fix · tier official · reviewed (checked by Opus)

What changed

GetBcptSummaryMD distinguishes a missing results file from one with no entries
An empty BCPT results file now produces a visible message under Performance test results
A missing results file still returns an empty string because no test was run
Pester tests added for ReadBcptFile and GetBcptSummaryMD covering missing and empty files
Behaviour changes for users or extensions.

AL objects touched

Actions/AnalyzeTests/TestResultAnalyzer.ps1: modified, not in the BC? snapshot

Context

Fixes: #2158 [Bug]: Performance Tests does not return any output and build is successful (closed)
Systems: platform

Source: metadata of a merged pull request in microsoft/AL-Go (al-go): title, labels, changed paths and counts, with a summary in our words. No source text and no description beyond one short quote (D10, D61).