A simple, high performance text editor.
Greg Pomerantz
5205906de4
Adds the corruption-proofing layer for the edit/persist path: - chunked_buffer_fuzz_test.go: differential fuzz of ChunkedBuffer Insert/Delete against a plain []byte shadow model (arbitrary byte positions/text, chunk sizes 1..64KB, 500-2000 ops each) verifying FileLen, FullContent, Content probes and the chunk-size invariant after every op; rune-aligned variant adds UTF-8 validity and an independent RuneIndexToByte oracle. - line_index_fuzz_test.go: differential fuzz of the incremental LineIndex updates against a full-recomputation oracle (mixed, no-newline, single-line, CRLF, trailing-newline shapes), plus a trailing-empty-line structural invariant test. - state_api_fuzz_test.go: differential fuzz of the production edit entry points (HandleInsert/Backspace/Delete/ReplaceRange, incl. selection variants) checking content, UTF-8 validity, chunk invariant, line index and exact cursor after every op. - real_file_fuzz_test.go (e2e): random edit sequences (incl. window-relative IME replaces) against the REAL filesystem with per-batch IME-window-consistency checks, forced-flush disk byte-comparison, then a second logic instance (restart simulation) must reload byte-identical content with a fresh line index; asserts no stray temp files. - filesystem_test.go (real): atomicity contract - exact round trip at edge sizes, concurrent reader never sees a torn file across 150 alternating 2MB writes, failed write (read-only dir) leaves the original byte-identical, stale temp file is consumed. Fixes a real invariant violation the fuzzing exposed: Insert halved an oversized spliced result once, so a large paste into a non-empty buffer left chunks up to ~P/2 (8x target at 1MB/64KB), breaking the documented 'no chunk > 2x target' invariant. Insert now re-chunks the oversized result into pieces of at most chunkSize, making the invariant hold after every edit. Mutation-tested: dropping one byte in Insert and one entry in UpdateLineIndexAfterInsert are both caught by the fuzz suite. |
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| .qwen | ||
| cmd/pad | ||
| doc | ||
| internal | ||
| scripts | ||
| .DS_Store | ||
| .gitignore | ||
| go.mod | ||
| go.sum | ||