test(military): the colour constants equal the Cesium.Color values they replaced

scripts/format-scope.json

@@ -327,6 +327,7 @@
   "src/layers/aircraft/render/navara.js",
   "src/layers/flights/renderer.test.mjs",
   "src/layers/military/renderer.test.mjs",
+  "src/layers/military/policy.test.mjs",
   "src/testSupport/aircraftRecordingRenderer.mjs",
   "src/layers/aircraft/render/cesium.test.mjs",
   "src/layers/aircraft/render/cesium.js",

src/layers/military/policy.test.mjs

@@ -0,0 +1,31 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import * as Cesium from 'cesium';
+import {
+  AMBER_TRANSPARENT,
+  MIL_ICON_COLOR,
+  TRACKED_ICON_COLOR,
+  TRACKED_BILLBOARD_SCALE_BY_DISTANCE,
+} from './policy.js';
+
+const fields = (color) => [color.red, color.green, color.blue, color.alpha];
+
+test('the military colours equal the Cesium.Color constants they replace', () => {
+  const amber = Cesium.Color.fromCssColorString('#FFB800');
+  assert.deepEqual(fields(MIL_ICON_COLOR), fields(amber));
+  assert.deepEqual(
+    fields(TRACKED_ICON_COLOR),
+    fields(Cesium.Color.fromCssColorString('#FFD166')),
+  );
+  assert.deepEqual(fields(AMBER_TRANSPARENT), fields(amber.withAlpha(0)));
+  for (const constant of [
+    MIL_ICON_COLOR,
+    TRACKED_ICON_COLOR,
+    AMBER_TRANSPARENT,
+  ])
+    assert.ok(Object.isFrozen(constant));
+  assert.deepEqual(
+    { ...TRACKED_BILLBOARD_SCALE_BY_DISTANCE },
+    { near: 1000, nearValue: 3, far: 8000000, farValue: 0.5 },
+  );
+});