fix(cockpit): the sensor strip follows the view through a zoom step; the pre-load level test checks a worked number; the boundary gate's dependency-asset exemption is tested

docs/CURRENT-STATE.md

@@ -1658,14 +1658,16 @@ the satellite's live altitude and the window's shape is still at least as
 wide as that swath (`orbitalMaxZoom` in `src/cockpitOrbital.js`); when the
 cap falls below the zoom shown, the view steps back to it. Unconfirmed
 swaths add no steps, but are still drawn, read out and offered to SENSOR.
-The sensor's swath is drawn to scale as a strip along the ground track with
+The sensor's swath is drawn to scale as a strip along the ground track (its
+width follows the view through a zoom step, not ahead of it) with
 a SENSOR SWATH readout, and a SENSOR button zooms to exactly that width when
 it lies between 1× and the cap. No strip is drawn for a geostationary view
 (no ground track; its sensors image areas, not strips) or a SAR (it images
 to one side of nadir, not under it); the readout stays. Tilted off nadir
 the strip stays (view and swath widen alike), the readout scales as the swath
 readout does (`SENSOR SWATH ≈ 191 KM`), and SENSOR, a nadir framing, is
-hidden; tilted past the Earth's limb neither the sensor nor the swath reads. A swath is confirmed only on the operator's, an agency's (ESA's
+hidden; tilted past the Earth's limb neither the sensor nor the swath
+reads. A swath is confirmed only on the operator's, an agency's (ESA's
 eoPortal included) or an academic page for its platform. From
 16×, with flat imagery on the globe (not Google 3D tiles) and the view at
 nadir, every 2 s the view asks the base imagery layer for the tiles it will

src/tooling/packageBoundaries.test.mjs

@@ -126,3 +126,49 @@ test('a lifecycle owner cannot acquire a layer panel even through an unused impo
   );
   await assert.rejects(checkPackageBoundaries(root), /unowned module.*panel/);
 });
+
+test('a declared dependency owns the asset files it ships, and only those', async (t) => {
+  const asset = (pkg) =>
+    `import url from './node_modules/${pkg}/flags/aa.svg?url&no-inline'; export const value = url;`;
+  const root = await fixture(t, asset('flags'));
+  for (const pkg of ['flags', 'flags-extra', 'stray']) {
+    await mkdir(path.join(root, 'node_modules', pkg, 'flags'), {
+      recursive: true,
+    });
+    await writeFile(
+      path.join(root, 'node_modules', pkg, 'flags/aa.svg'),
+      '<svg xmlns="http://www.w3.org/2000/svg"/>',
+    );
+  }
+  await writeFile(
+    path.join(root, 'package.json'),
+    JSON.stringify({
+      name: 'boundary-fixture',
+      type: 'module',
+      exports: { './feature': './entry.js' },
+      dependencies: { flags: '1.0.0' },
+    }),
+  );
+  await writeFile(
+    path.join(root, 'scripts/package-boundaries.json'),
+    JSON.stringify({
+      feature: {
+        exports: ['./feature'],
+        modules: ['entry.js'],
+        external: ['flags'],
+      },
+    }),
+  );
+  // The entry and the flag it ships.
+  assert.deepEqual(await checkPackageBoundaries(root), [
+    { name: 'feature', exports: 1, modules: 2 },
+  ]);
+  // An undeclared package's file, and one whose name only starts the same.
+  for (const pkg of ['stray', 'flags-extra']) {
+    await writeFile(path.join(root, 'entry.js'), asset(pkg));
+    await assert.rejects(
+      checkPackageBoundaries(root),
+      new RegExp(`unowned module.*node_modules/${pkg}/`),
+    );
+  }
+});

src/ui/cockpitOrbitalView.js

@@ -631,6 +631,11 @@ export function publishOrbitalView(info, transition = IDLE_TRANSITION) {
     : canvasAspect(this.viewer);
   const settledFov = fovForZoom(orbitalBaseFovRad(info.altitudeM), state.zoom);
   const footprintKm = footprintWidthKm(info.altitudeM, settledFov, aspect);
+  // The strip is drawn over the picture, so it follows the view as a step
+  // zooms (republished every frame then), not the step it is heading for.
+  const shownKm = Number.isFinite(state.verticalFov)
+    ? footprintWidthKm(info.altitudeM, state.verticalFov, aspect)
+    : footprintKm;
   const maxZoom = orbitalMaxZoomFor.call(this, info);
   const swathKm = sensorSwathKm(info);
   const trackUp = Number.isFinite(info.groundTrackDeg);
@@ -687,7 +692,7 @@ export function publishOrbitalView(info, transition = IDLE_TRANSITION) {
             // along, and a SAR images to one side of nadir, not under it.
             stripFraction:
               trackUp && info.sensor?.type !== 'SAR'
-                ? sensorStripFraction(swathKm, footprintKm)
+                ? sensorStripFraction(swathKm, shownKm)
                 : null,
             zoom: sensorSwathZoom(info.altitudeM, swathKm, aspect, maxZoom),
           },

src/ui/cockpitOrbitalView.test.mjs

@@ -26,7 +26,6 @@ import {
 } from '../cockpitOrbital.js';
 import { vesselCockpitInfo } from '../layers/vessels/cockpitSubject.js';
 import { prefetchImageryAhead } from './cockpitOrbitalView.js';
-import { imageryLevelForView } from '../cockpitOrbital.js';
 import { claimPointer, releasePointer } from '../data/inputOwnership.js';
 
 const ISS = Object.freeze({
@@ -1161,6 +1160,27 @@ function imageryGlobe(viewer, { requestImage } = {}) {
 
 const WORLDVIEW_ON_TRACK = Object.freeze({ ...WORLDVIEW, groundTrackDeg: 52 });
 
+test('the sensor strip follows the view through a zoom step, not ahead of it', async (t) => {
+  const { cockpit, store, clock } = await orbitAt(t, {
+    satellite: WORLDVIEW,
+    reducedMotion: false,
+  });
+  const strip = () => store.orbital.sensor.stripFraction;
+  const atOne = strip();
+  assert.ok(atOne > 0 && atOne < 1);
+  press(cockpit, '+');
+  cockpit.update();
+  near(strip(), atOne, 'the step starts at 1x, and so does the strip');
+  clock.advance(ORBITAL_ZOOM_TRANSITION_MS / 2);
+  cockpit.update();
+  const midway = strip();
+  clock.advance(ORBITAL_ZOOM_TRANSITION_MS + 1000);
+  cockpit.update();
+  const atTwo = strip();
+  assert.ok(atTwo > atOne * 1.5, 'twice the zoom, about twice the share');
+  assert.ok(midway > atOne && midway < atTwo, 'part-way through the step');
+});
+
 test('from 16x the imagery ahead of the ground track is pre-loaded', async (t) => {
   const { cockpit, viewer, store, clock } = await orbitAt(t, {
     satellite: WORLDVIEW_ON_TRACK,
@@ -1444,16 +1464,13 @@ test('the pre-load is throttled, at the level Cesium draws, and waits out a tilt
     );
     assert.equal(request.type, Cesium.RequestType.IMAGERY);
   }
-  // The level Cesium's own selection takes for this view.
-  const fov = fovForZoom(orbitalBaseFovRad(WORLDVIEW.altitudeM), 16);
-  const metresPerPixel =
-    (WORLDVIEW.altitudeM * 2 * Math.tan(fov / 2)) /
-    viewer.scene.canvas.clientHeight;
-  const expected = imageryLevelForView(new Cesium.WebMercatorTilingScheme(), {
-    metresPerPixel,
-    latitudeDeg: WORLDVIEW.latitude,
-  });
-  assert.equal(Number(requests[0].split('/')[0]), expected);
+  // The level Cesium's own selection takes for this view, worked by hand:
+  // at 16x from 617 km the 900 px canvas is ~49.5 m a pixel. The ellipsoid
+  // terrain's level-zero error is 6378137 · 2π / 4 / 130 ≈ 77,067 m; it first
+  // meets Cesium's screen-space error of 2 px (≤ 99 m) at level 10, 75.3 m.
+  // A Web Mercator level-zero texel at 30° is 6378137 · 2π · cos 30° / 256
+  // ≈ 135,566 m, so the imagery level is round(log2(135,566 / 75.3)) = 11.
+  assert.equal(Number(requests[0].split('/')[0]), 11);
 });
 
 test('the TLE age is measured from the time the satellite is shown at', async (t) => {