Add per-file discovery and run mode (fixes #2723)#2725
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Adds Run.PerFileDiscovery option (default true) that discovers and runs each test container one at a time instead of discovering all first. This improves container isolation and reduces peak memory usage by releasing block trees after each container completes. The original batch behavior is preserved as a fallback when PerFileDiscovery is set to false. Refactored Invoke-Test into three functions: - Invoke-Test: dispatches based on PerFileDiscovery setting - Invoke-TestBatch: original discover-all-then-run-all flow - Invoke-TestPerFile: per-container discover-then-run loop - Invoke-ContainerDiscovery: single-container discovery helper Global plugin hooks (DiscoveryStart/End, RunStart/End) fire once around the full run. Per-container hooks (ContainerDiscoveryStart/End, ContainerRunStart/End) fire as before. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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| $steps = $state.Plugin.RunStart | ||
| if ($null -ne $steps -and 0 -lt @($steps).Count) { | ||
| Invoke-PluginStep -Plugins $state.Plugin -Step RunStart -Context @{ | ||
| Blocks = @($allDiscovered | & $SafeCommands['ForEach-Object'] { $_.Block }) |
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Adds a
Run.PerFileDiscoveryoption (defaulttrue) that discovers and runs each test container one at a time instead of discovering all containers first, then running all.Why: The current batch model (discover all → run all) accumulates module state and scope pollution across containers during discovery. Per-file mode isolates each container: discover it, run it, release it, move to the next.
What changed:
Run.PerFileDiscoveryboolean option (defaulttrue)Invoke-TestintoInvoke-TestBatch(original flow) andInvoke-TestPerFile(new flow)Invoke-ContainerDiscoveryextracted as a single-container discovery helperDiscoveryStart/End,RunStart/End) fire once around the full runFallback: Set
Run.PerFileDiscovery = $falseto revert to the original batch behavior.All 2285 tests pass in both modes.