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rbrirbri
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ES2025 Set methods implemented
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‎src/changes/changes.xml‎

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<body>
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<release version="4.16.0" date="August 17, 2025" description="StringUtils, Brotli, spread for object literals, Bugfixes">
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<action type="add" dev="RhinoTeam">
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core-js: ES2025 Set methods intersection(), union(), difference(), symmetricDifference(), isSubsetOf(),
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isSupersetOf(), and isDisjointFrom() implemented
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</action>
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<action type="fix" dev="RhinoTeam">
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core-js: make Object.assign copy over Symbol properties
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</action>

‎src/test/java/org/htmlunit/javascript/NativeSetTest.java‎

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/*
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* Copyright (c) 2002-2025 Gargoyle Software Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.htmlunit.javascript;
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import org.htmlunit.WebDriverTestCase;
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import org.htmlunit.junit.annotation.Alerts;
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import org.junit.jupiter.api.Test;
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/**
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* Tests for NativeSet.
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*
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* @author Ronald Brill
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*/
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public class NativeSetTest extends WebDriverTestCase {
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/**
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* @throws Exception if the test fails
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*/
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@Test
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@Alerts("1,9")
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public void intersection() throws Exception {
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final String html = DOCTYPE_HTML
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+ "<html><head></head>\n"
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+ "<body>\n"
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+ "<script>\n"
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+ LOG_TITLE_FUNCTION
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+ "let odds = new Set([1, 3, 5, 7, 9]);\n"
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+ "let squares = new Set([1, 4, 9]);\n"
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+ "let result = odds.intersection(squares);\n"
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+ "log(Array.from(result).sort().join(','));\n"
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+ "</script>\n"
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+ "</body></html>";
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loadPageVerifyTitle2(html);
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}
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/**
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* @throws Exception if the test fails
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*/
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@Test
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@Alerts("1,2,4,6,8,9")
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public void union() throws Exception {
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final String html = DOCTYPE_HTML
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+ "<html><head></head>\n"
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+ "<body>\n"
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+ "<script>\n"
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+ LOG_TITLE_FUNCTION
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+ "let evens = new Set([2, 4, 6, 8]);\n"
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+ "let squares = new Set([1, 4, 9]);\n"
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+ "let result = evens.union(squares);\n"
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+ "log(Array.from(result).sort().join(','));\n"
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+ "</script>\n"
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+ "</body></html>";
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loadPageVerifyTitle2(html);
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}
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/**
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* @throws Exception if the test fails
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*/
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@Test
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@Alerts("3,5,7")
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public void difference() throws Exception {
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final String html = DOCTYPE_HTML
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+ "<html><head></head>\n"
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+ "<body>\n"
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+ "<script>\n"
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+ LOG_TITLE_FUNCTION
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+ "let odds = new Set([1, 3, 5, 7, 9]);\n"
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+ "let squares = new Set([1, 4, 9]);\n"
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+ "let result = odds.difference(squares);\n"
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+ "log(Array.from(result).sort().join(','));\n"
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+ "</script>\n"
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+ "</body></html>";
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loadPageVerifyTitle2(html);
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}
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/**
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* @throws Exception if the test fails
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*/
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@Test
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@Alerts("1,2,6,8,9")
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public void symmetricDifference() throws Exception {
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final String html = DOCTYPE_HTML
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+ "<html><head></head>\n"
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+ "<body>\n"
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+ "<script>\n"
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+ LOG_TITLE_FUNCTION
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+ "let evens = new Set([2, 4, 6, 8]);\n"
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+ "let squares = new Set([1, 4, 9]);\n"
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+ "let result = evens.symmetricDifference(squares);\n"
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+ "log(Array.from(result).sort().join(','));\n"
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+ "</script>\n"
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+ "</body></html>";
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loadPageVerifyTitle2(html);
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}
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/**
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* @throws Exception if the test fails
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*/
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@Test
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@Alerts("true")
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public void isSubsetOf() throws Exception {
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final String html = DOCTYPE_HTML
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+ "<html><head></head>\n"
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+ "<body>\n"
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+ "<script>\n"
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+ LOG_TITLE_FUNCTION
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+ "let fours = new Set([4, 8, 12, 16]);\n"
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+ "let evens = new Set([2, 4, 6, 8, 10, 12, 14, 16, 18]);\n"
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+ "let result = fours.isSubsetOf(evens);\n"
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+ "log(result);\n"
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+ "</script>\n"
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+ "</body></html>";
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loadPageVerifyTitle2(html);
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}
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/**
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* @throws Exception if the test fails
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*/
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@Test
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@Alerts("true")
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public void isSupersetOf() throws Exception {
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final String html = DOCTYPE_HTML
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+ "<html><head></head>\n"
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+ "<body>\n"
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+ "<script>\n"
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+ LOG_TITLE_FUNCTION
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+ "let fours = new Set([4, 8, 12, 16]);\n"
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+ "let evens = new Set([2, 4, 6, 8, 10, 12, 14, 16, 18]);\n"
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+ "let result = evens.isSupersetOf(fours);\n"
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+ "log(result);\n"
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+ "</script>\n"
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+ "</body></html>";
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loadPageVerifyTitle2(html);
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}
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/**
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* @throws Exception if the test fails
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*/
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@Test
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@Alerts("true")
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public void isDisjointFrom() throws Exception {
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final String html = DOCTYPE_HTML
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+ "<html><head></head>\n"
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+ "<body>\n"
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+ "<script>\n"
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+ LOG_TITLE_FUNCTION
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+ "let primes = new Set([2, 3, 5, 7, 11, 13, 17, 19]);\n"
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+ "let squares = new Set([1, 4, 9, 16]);\n"
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+ "let result = primes.isDisjointFrom(squares);\n"
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+ "log(result);\n"
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+ "</script>\n"
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+ "</body></html>";
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loadPageVerifyTitle2(html);
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}
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}

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