test: exercise traffic with current vector and terrain fixtures

src/tooling/trafficFixtures.test.mjs

@@ -0,0 +1,92 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import {
+  trafficFixtureResponse,
+  trafficFixtureTile,
+} from '../../scripts/traffic-fixtures.mjs';
+import { decodeOpenFreeMapTile } from '../sources/openFreeMap.js';
+import { isDrivableFlowSegment } from '../layers/traffic/roadModes.js';
+import { decodeFlowTile } from '../layers/traffic/flowDecode.js';
+
+test('traffic fixtures provide aligned current road tiles and partial flow coverage', () => {
+  for (const z of [12, 14]) {
+    const roads = decodeOpenFreeMapTile(
+      trafficFixtureTile(z),
+      z,
+      935,
+      1686,
+    ).roads;
+    const flow = decodeFlowTile(trafficFixtureTile(z, true), z, 935, 1686);
+    assert.ok(roads.length > flow.length && flow.length > 0);
+    for (const segment of flow) {
+      assert.equal(segment.trafficLevel, 0.6);
+      assert.equal(isDrivableFlowSegment(segment), true);
+      assert.ok(
+        roads.some(
+          (road) =>
+            JSON.stringify(road.coordinates) === JSON.stringify(segment.coords),
+        ),
+      );
+    }
+  }
+});
+
+test('fixture TileJSON and every road/flow request stay on intercepted sources', () => {
+  const request = (url) => trafficFixtureResponse({ url: () => url });
+  const metadata = JSON.parse(
+    request('https://tiles.openfreemap.org/planet').body,
+  );
+  const tileUrl = metadata.tiles[0]
+    .replace('{z}', '14')
+    .replace('{x}', '935')
+    .replace('{y}', '1686');
+  assert.ok(
+    decodeOpenFreeMapTile(request(tileUrl).body, 14, 935, 1686).roads.length,
+  );
+  assert.ok(
+    decodeFlowTile(
+      request('http://localhost/api/tomtom/flow/12/935/1686.pbf').body,
+      12,
+      935,
+      1686,
+    ).length,
+  );
+  assert.throws(
+    () => request('https://tiles.openfreemap.org/unexpected'),
+    /Unrecognized/,
+  );
+  assert.equal(request('http://localhost/api/unrelated'), null);
+});
+
+test('flat terrain fixture decodes through Cesium and advertises no network children', async () => {
+  const { createServer } = await import('node:http');
+  const { CesiumTerrainProvider } = await import('cesium');
+  const server = createServer((req, res) => {
+    const response = trafficFixtureResponse({
+      url: () => `https://terrain.reearth.land${req.url}`,
+    });
+    res.writeHead(response.status, { 'content-type': response.contentType });
+    res.end(response.body);
+  });
+  await new Promise((resolve) => server.listen(0, '127.0.0.1', resolve));
+  try {
+    const provider = await CesiumTerrainProvider.fromUrl(
+      `http://127.0.0.1:${server.address().port}`,
+    );
+    for (const x of [0, 1]) {
+      const data = await provider.requestTileGeometry(x, 0, 0);
+      const rect = provider.tilingScheme.tileXYToRectangle(x, 0, 0);
+      assert.equal(
+        data.interpolateHeight(rect, (rect.west + rect.east) / 2, 0),
+        0,
+      );
+      for (const dx of [0, 1])
+        for (const dy of [0, 1]) {
+          assert.equal(data.isChildAvailable(x, 0, x * 2 + dx, dy), false);
+        }
+    }
+  } finally {
+    server.closeAllConnections();
+    await new Promise((resolve) => server.close(resolve));
+  }
+});