v8/test/intl/collator/de-sort.js

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// Sort plain German text using defaults.

var strings = ['März', 'Fuße', 'FUSSE', 'Fluße', 'Flusse',
               'flusse', 'fluße', 'flüße', 'flüsse'];

var collator = Intl.Collator(['de']);
var result = strings.sort(collator.compare);

assertEquals('flusse', result[0]);
assertEquals('Flusse', result[1]);
assertEquals('fluße', result[2]);
assertEquals('Fluße', result[3]);
assertEquals('flüsse', result[4]);
assertEquals('flüße', result[5]);
assertEquals('FUSSE', result[6]);
assertEquals('Fuße', result[7]);
assertEquals('März', result[8]);

result = ["AE", "Ä"].sort(new Intl.Collator("de", {usage: "sort"}).compare)
assertEquals("Ä", result[0]);
assertEquals("AE", result[1]);
result = ["AE", "Ä"].sort(new Intl.Collator("de", {usage: "search"}).compare)
assertEquals("AE", result[0]);
assertEquals("Ä", result[1]);


var collator = new Intl.Collator("de", {usage: "search"});
collator.resolvedOptions() // This triggers the code that removes the u-co-search keyword
result = ["AE", "Ä"].sort(collator.compare)
assertEquals("AE", result[0]);
assertEquals("Ä", result[1]);