fix: rename provincesByIso to isoByProvince in Iran test

The map is keyed by province name (NAME_1) and maps to ISO codes, not the other way around; the old name implied the opposite. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
test: assert Iran province count and non-empty ISO codes
2026-08-20 07:01:17 +00:00 · 2026-08-12 14:53:49 -07:00 · 2026-08-12 14:53:17 -07:00 · 2026-08-12 14:53:17 -07:00
1 changed files with 66 additions and 0 deletions
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+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+import fs from 'fs';
+import path from 'path';
+
+// The geojson is loaded via fs rather than a normal import because the
+// webpack/jest loaders treat *.geojson as an opaque asset (a URL string in
+// the browser build, an empty mock object under jest), so neither exposes
+// the actual feature data to a unit test.
+const iranGeojsonPath = path.join(
+  __dirname,
+  '..',
+  '..',
+  'src',
+  'countries',
+  'iran.geojson',
+);
+
+type IranFeature = {
+  properties: { ISO: string; NAME_1: string };
+};
+
+const getIranFeatures = (): IranFeature[] =>
+  JSON.parse(fs.readFileSync(iranGeojsonPath, 'utf-8')).features;
+
+test('every province in the Iran map has a unique, non-empty ISO code', () => {
+  const features = getIranFeatures();
+  // Iran has 31 provinces; assert the count so a deleted feature is caught,
+  // not just a duplicated ISO code among whatever features remain.
+  expect(features).toHaveLength(31);
+
+  const isoCodes = features.map(feature => feature.properties.ISO);
+  isoCodes.forEach(iso => expect(iso).toBeTruthy());
+
+  const uniqueIsoCodes = new Set(isoCodes);
+  expect(uniqueIsoCodes.size).toBe(isoCodes.length);
+});
+
+test('Tehran, Alborz and Razavi Khorasan have their correct, distinct ISO codes', () => {
+  const isoByProvince = Object.fromEntries(
+    getIranFeatures().map(feature => [
+      feature.properties.NAME_1,
+      feature.properties.ISO,
+    ]),
+  );
+
+  expect(isoByProvince.Tehran).toBe('IR-07');
+  expect(isoByProvince.Alborz).toBe('IR-30');
+  expect(isoByProvince['Razavi Khorasan']).toBe('IR-09');
+});