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frontend/src/lib/url-state.test.ts

@@ -2,6 +2,7 @@ import { beforeEach, describe, expect, it } from 'vitest';
 
 import type { FeatureMeta } from '../types';
 import { parseUrlState, stateToParams } from './url-state';
+import { createSchoolFilterKey } from './school-filter';
 
 describe('url-state', () => {
   beforeEach(() => {
@@ -79,6 +80,36 @@ describe('url-state', () => {
     expect(params.getAll('tt')).toEqual(['bicycle:bank:Bank:5:25']);
   });
 
+  it('round-trips repeated school filters with dedicated URL params', () => {
+    const schoolOne = createSchoolFilterKey('primary', 'good', 2, 1);
+    const schoolTwo = createSchoolFilterKey('secondary', 'outstanding', 5, 2);
+
+    const params = stateToParams(
+      null,
+      {
+        [schoolOne]: [1, 10],
+        [schoolTwo]: [2, 15],
+      },
+      [],
+      new Set(),
+      'area'
+    );
+
+    expect(params.getAll('school')).toEqual([
+      'primary:good:2:1:10',
+      'secondary:outstanding:5:2:15',
+    ]);
+    expect(params.getAll('filter')).toEqual([]);
+
+    window.history.replaceState({}, '', `/?${params.toString()}`);
+    const state = parseUrlState();
+
+    expect(state.filters).toEqual({
+      [createSchoolFilterKey('primary', 'good', 2, 0)]: [1, 10],
+      [createSchoolFilterKey('secondary', 'outstanding', 5, 1)]: [2, 15],
+    });
+  });
+
   it('omits the default area tab', () => {
     const params = stateToParams(null, {}, [], new Set(), 'area');