feat: add mock_virtual_filesystem() for declarative file mocking#104
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feat: add mock_virtual_filesystem() for declarative file mocking#104Koan-Bot wants to merge 1 commit intocpan-authors:mainfrom
Koan-Bot wants to merge 1 commit intocpan-authors:mainfrom
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Wraps the most common mock_all_from_stat usage pattern — a hash lookup from file paths to stat results — into a single function that returns a scope guard for automatic cleanup. Also exports get_basetime() (previously XS-only, not importable) for users who need to construct timestamps relative to $^T for -M/-C/-A mocks. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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What
Adds
mock_virtual_filesystem()— a convenience function that wraps the most commonmock_all_from_statusage pattern into a single declarative call with automatic guard cleanup. Also exportsget_basetime().Why
The dominant usage pattern for
mock_all_from_statis a hash lookup from paths to stat results, wrapped in a cleanup block. Every test file reimplements the same boilerplate: build a hash, write a callback withexists+FALLBACK_TO_REAL_OP, remember to unmock. This function eliminates that repetition.get_basetime()was defined in XS but not importable — users mocking-M/-C/-Ahad to use the fully-qualifiedOverload::FileCheck::get_basetime().How
mock_virtual_filesystem(%path_to_stat)callsmock_all_from_statwith a generated lookup callback and returns a Guard that unmocks all ops (including stat/lstat) on scope exit. Reuses existingOverload::FileCheck::Guardclass.Testing
t/mock-virtual-filesystem.tcovers: existence checks, file type checks, size, stacked ops, real filesystem fallback, guard cleanup, guard cancel, nested guards, and stat data verification.get_basetimeexport verified against$^T.🤖 Generated with Claude Code
Quality Report
Changes: 2 files changed, 171 insertions(+), 1 deletion(-)
Code scan: clean
Tests: passed (0 Tests)
Branch hygiene: clean
Generated by Kōan post-mission quality pipeline