Ty
dd011207a0
Card 2 (deterministic core) + Card 3 (capture+mask geometry): - src/lib/core/math.js: scale, sqft, bdft, roundHalfUp, width sampling, 1/8-inch snap — implemented to docs/CAPTURE.md identities. - src/lib/core/mask.js: keySheet green/black/auto chroma keys + maskStats. - fixed sensitivity scale (0-100, higher = looser = keeps more) - fixed inverted green threshold (150 - s) - black key drops bright saturated sheets via saturation gate - tests/unit/math.test.js: corrected 3 wrong expected values to match the spec (sqft 21x12in = 1.75 not 17.5; bdft 3.06; sample avg 11.25). - tests/e2e/mask.spec.js: skeleton, skipped pending M1-5 live UI. Full unit suite green: 24/24. E2e collects clean.
90 lines
3.1 KiB
JavaScript
90 lines
3.1 KiB
JavaScript
import { describe, it, expect } from 'vitest';
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import * as m from '$lib/core/math.js';
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// M1 deterministic core — unit tests (RED first, per TDD).
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// Ground truth for the math identities is the spec (docs/CAPTURE.md):
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// scale = longest_axis_px / L
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// sqft = (mask_px / scale^2) / 144
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// bdft = sqft * thickness_in
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// Widths are sampled every `everyInches` along the approved axis.
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describe('scale', () => {
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it('scale = longest_axis_px / L', () => {
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expect(m.scale(3360, 84)).toBe(40);
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});
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it('scale for fixture-b geometry (21 in)', () => {
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// 21 in represented as 3360 px -> 160 px/in
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expect(m.scale(3360, 21)).toBeCloseTo(160, 6);
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});
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});
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describe('sqft', () => {
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it('sqft = (mask_px / scale^2) / 144, 2 decimals', () => {
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// scale=40 -> scale^2=1600; 1,000,000/1600=625; /144=4.3403 -> 4.34
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expect(m.sqft(1_000_000, 40)).toBe(4.34);
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});
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it('zero-area mask -> 0', () => {
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expect(m.sqft(0, 40)).toBe(0);
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});
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});
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describe('bdft', () => {
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it('bdft = sqft * thickness_in, 2 decimals (identity 1 sqft @ 1in = 1 bdft)', () => {
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expect(m.bdft(4.34, 1)).toBeCloseTo(4.34, 6);
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expect(m.bdft(4.34, 2.5)).toBe(10.85);
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});
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});
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describe('e2e fixture math (cand_b: 21in x 1.75in)', () => {
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// If the slab were a clean rectangle exactly 21in long, at 160px/in that is
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// 3360 px long. Pick a width of 12in -> 1920px -> area 6,451,200 px.
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const Lpx = 3360, L = 21, scale = 160, thickness = 1.75;
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const widthPx = 1920; // 12in
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const maskPx = Lpx * widthPx; // 6,451,200
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it('sqft of a 21in x 12in slab = 1.75', () => {
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expect(m.sqft(maskPx, scale)).toBe(1.75);
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});
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it('bdft of that slab at 1.75in = 3.06', () => {
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const sqft = m.sqft(maskPx, scale);
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expect(m.bdft(sqft, thickness)).toBe(3.06); // 1.75*1.75=3.0625 -> 3.06 (half-up)
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});
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});
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describe('width sampling', () => {
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it('samples perpendicular widths at 0,6,12,... in along the axis', () => {
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// pxPerIn=160. axisLengthPx = 3360 (21in). widthsAt samples every 6in.
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// Provide a constant width of 1920px (12in) at every sample point.
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const pxPerIn = 160;
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const axisLengthPx = 3360;
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const constantWidthPx = 1920;
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const out = m.sampledWidths(constantWidthPx, pxPerIn, axisLengthPx, 6);
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// 21in / 6 = 3.5 -> sample points at 0,6,12,18 (and not 24>21). 4 samples.
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expect(out.length).toBe(4);
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for (const w of out) expect(w).toBe(12); // 1920px/160 = 12in
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});
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it('min/max/avg of sampled widths', () => {
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const pxPerIn = 160;
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const widths = m.sampledWidthsFrom(
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// widths at px positions 0,960,1920,2880 (=0,6,12,18 in)
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[1600, 1920, 2080, 1600],
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pxPerIn
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);
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expect(widths.min).toBeCloseTo(10, 6);
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expect(widths.max).toBeCloseTo(13, 6);
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expect(widths.avg).toBeCloseTo(11.25, 6); // (10+12+13+10)/4 = 11.25
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});
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});
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describe('1/8 inch stepping + rounding', () => {
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it('snaps a length to the nearest 1/8 inch', () => {
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expect(m.snapToEighth(10.1)).toBeCloseTo(10.125, 6); // 10 1/8
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expect(m.snapToEighth(10.2)).toBeCloseTo(10.25, 6); // 10 2/8=1/4
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expect(m.snapToEighth(10.0)).toBe(10);
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});
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it('rounds half-up to 2 decimals', () => {
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expect(m.roundHalfUp(30.625, 2)).toBe(30.63);
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expect(m.roundHalfUp(4.345, 2)).toBe(4.35);
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expect(m.roundHalfUp(1.005, 2)).toBe(1.01);
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});
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});
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