const test=require('node:test'),assert=require('node:assert/strict');
const geo=require('./web/geography.js');
test('legacy known China path upgrades losslessly',()=>{
 const v=geo.infer({province:'山东省',city:'烟台市',district:'莱阳市'});
 assert.equal(v.mode,'china');assert.equal(v.districtCode,'370682');
 assert.match(geo.label(v),/山东省 · 烟台市 · 莱阳市/);
});
test('unknown historic names are preserved in custom mode',()=>{
 const v=geo.infer({nativeCountry:'中国',nativeProvince:'山东',nativeCity:'登州府'},'native');
 assert.equal(v.mode,'custom');assert.equal(v.city,'登州府');
});
test('changing an ancestor clears every lower selection',()=>{
 let v=geo.infer({province:'山东省',city:'烟台市',district:'莱阳市'});
 v=geo.change(v,'provinceCode','11');assert.equal(v.province,'北京市');
 assert.equal(v.city,'');assert.equal(v.cityCode,'');assert.equal(v.districtCode,'');
 v=geo.change(v,'mode','world');assert.equal(v.provinceCode,'');assert.equal(v.countryCode,'');
 v=geo.change(v,'countryCode','US');assert.equal(v.country,'美国');
 v=geo.change({...v,city:'Boston'},'countryCode','JP');assert.equal(v.city,'');
});
test('self-defined celestial names and deep paths display without pretending to be administrative codes',()=>{
 const v=geo.infer({geography:{mode:'custom',body:'火星',path:'基地 / 居住区 / 一栋 / 二层'}});
 assert.equal(geo.label(v),'火星 · 基地 / 居住区 / 一栋 / 二层');
});
test('world selection can return to China cascade',()=>{
 assert.equal(geo.change({mode:'world'},'countryCode','CN').mode,'china');
});