Files
msd-core/tests/4213-progress-helpers.property.test.cjs
Atirna 70f22e4643 fix(#4213): keep STATE.md progress surfaces synchronized (#4231)
* fix(#4213): keep STATE.md progress surfaces synchronized

* fix(#4213): clamp the shared progress bar and keep bold-first priority, changeset + property tests

- formatProgressMachineSegment clamps through clampPercentFromFraction
  (ADR-3180 Decision 7 kernel) with a 0 floor, so a hand-edited
  out-of-range persisted percent renders a clamped bar instead of
  throwing RangeError on repeat() inside the write seam
- stateReplaceProgressPercent restores the #2177 bold-first priority:
  **Progress:** anywhere in the body wins; a plain ^Progress: line is
  the fallback, so free text starting with Progress: cannot capture
  the rewrite ahead of the real status line
- cross-reference comment names the three consumers and the
  cmdStateSync sanctioned exception (ADR-3408 §8.3)
- CONTEXT.md: applyPostSyncPreservation reconciliation documented in
  the STATE.md Transition Module entry
- property tests (never-throws/well-formed, idempotency, round-trip,
  bold-first) + two regression rows through the CLI

---------

Co-authored-by: Tom Boucher <trekkie@nomorestars.com>
2026-09-05 07:56:06 -04:00

91 lines
4.0 KiB
JavaScript

'use strict';
/**
* Property-based tests for the #4213 progress-surface helpers
*
* Module: gsd-core/bin/lib/state-transition.cjs
* Exported: formatProgressMachineSegment(percent),
* stateReplaceProgressPercent(content, percent)
*
* Properties tested:
* (a) formatProgressMachineSegment: never throws on any finite input
* (the review's RangeError case — persisted frontmatter values are
* hand-editable and only finiteness-checked upstream)
* (b) formatProgressMachineSegment: always returns a well-formed
* `[bar] NN%` segment with an exactly-10-glyph bar, 0-100 percent
* (c) stateReplaceProgressPercent: idempotent — a second application with
* the same percent is a no-op
* (d) stateReplaceProgressPercent: round-trip — the written bar re-parses
* to the same (clamped) percent for any 0-100 input
*/
const { describe, test } = require('node:test');
const assert = require('node:assert/strict');
const fc = require('./helpers/fast-check-setup.cjs');
const {
formatProgressMachineSegment,
stateReplaceProgressPercent,
} = require('../gsd-core/bin/lib/state-transition.cjs');
const SEGMENT_RE = /^\[(█{0,10}░{0,10})\] (\d{1,3})%$/;
function clampToPercentRange(n) {
return Math.max(0, Math.min(100, Math.round(n)));
}
describe('formatProgressMachineSegment properties (#4213 review finding)', () => {
// (a) + (b) never throws, always well-formed, for ANY finite number.
test('property: never throws and always yields a well-formed segment for any finite percent', () => {
fc.assert(
fc.property(fc.double({ noDefaultInfinity: true, noNaN: true }), (percent) => {
const segment = formatProgressMachineSegment(percent);
const match = SEGMENT_RE.exec(segment);
assert.ok(match, `segment must match [bar] NN%, got ${segment}`);
assert.equal(match[1].length, 10, 'bar must be exactly 10 glyphs');
const printed = Number(match[2]);
assert.ok(printed >= 0 && printed <= 100, `printed percent must be clamped, got ${printed}`);
}),
);
});
// Bar fill agrees with the printed percent at the 0-100 boundaries reviewers read.
test('boundary literals: 0, 100, 105, -30', () => {
assert.equal(formatProgressMachineSegment(0), '[░░░░░░░░░░] 0%');
assert.equal(formatProgressMachineSegment(100), '[██████████] 100%');
assert.equal(formatProgressMachineSegment(105), '[██████████] 100%');
assert.equal(formatProgressMachineSegment(-30), '[░░░░░░░░░░] 0%');
});
});
describe('stateReplaceProgressPercent properties (#4213 review finding)', () => {
// Any percent the writer can be handed, applied to a representative body.
const anyPercent = fc.integer({ min: -1000, max: 1000 });
// (c) idempotency: applying twice with the same percent changes nothing more.
test('property: idempotent on a second application with the same percent', () => {
fc.assert(
fc.property(anyPercent, (percent) => {
const content = '# Project State\n\n**Progress:** [█████░░░░░] 50% (2/4 plans done)\n';
const once = stateReplaceProgressPercent(content, percent);
const twice = stateReplaceProgressPercent(once, percent);
assert.equal(twice, once);
}),
);
});
// (d) round-trip: the segment the helper writes re-parses to the same
// clamped percent it printed for any in-range input.
test('property: written segment re-parses to the clamped percent (0-100)', () => {
fc.assert(
fc.property(fc.integer({ min: 0, max: 100 }), (percent) => {
const content = 'Progress: [██░░░░░░░░] 20%\n';
const updated = stateReplaceProgressPercent(content, percent);
const match = /\[(█{0,10}░{0,10})\] (\d{1,3})%/.exec(updated);
assert.ok(match, `rewritten body must carry a machine segment, got ${updated}`);
assert.equal(Number(match[2]), clampToPercentRange(percent));
}),
);
});
});