Extract instance-owned civil-flight components

src/scenes/scenePolicy.test.mjs

@@ -1,3 +1,4 @@
+import { readLayerSource } from '../testSupport/readLayerSource.mjs';
 import assert from 'node:assert/strict';
 import fs from 'node:fs';
 import test from 'node:test';
@@ -24,10 +25,10 @@ function sweepLayerParamKeys() {
   const dataDir = new URL('../data/', import.meta.url);
   for (const entry of fs.readdirSync(dataDir)) {
     if (!entry.endsWith('.js')) continue;
-    const source = fs.readFileSync(new URL(entry, dataDir), 'utf8');
+    const source = readLayerSource(new URL(entry, dataDir));
     // Every getParams() in this codebase is a plain object return; take the
     // body up to its closing brace and read the keys it publishes.
-    const body = source.match(/\n {2}getParams\(\)\s*\{[\s\S]*?\n {2}\},/);
+    const body = source.match(/\n\s+getParams\(\)\s*\{[\s\S]*?\n\s+\},/);
     if (!body) continue;
     // A key always follows `{` or `,` — which matches both the multi-line
     // returns and the single-line `return { passive: … }` form, while a