feat: add native road parity baseline

scripts/test-road-parity.js

@@ -0,0 +1,30 @@
+#!/usr/bin/env node
+"use strict";
+
+const assert = require("assert/strict");
+const { compare } = require("./road-parity");
+
+const baseline = {
+  contract: "native-road-package/v1",
+  areaId: "fixture",
+  files: {
+    "layers/road_surface.geojson": {
+      contentHash: "content-a",
+      orderHash: "order-a",
+      features: 2,
+      bytes: 100,
+    },
+  },
+};
+
+assert.deepEqual(compare(baseline, baseline), []);
+assert.match(
+  compare({ ...baseline, files: { "layers/road_surface.geojson": { ...baseline.files["layers/road_surface.geojson"], orderHash: "order-b" } } }, baseline).join("\n"),
+  /orderHash/,
+);
+assert.match(
+  compare({ ...baseline, files: {} }, baseline).join("\n"),
+  /missing file/,
+);
+
+console.log("road parity tests passed");