75 lines
2.3 KiB
Java
75 lines
2.3 KiB
Java
/*
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* Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.util.stream.Collectors;
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import java.util.stream.IntStream;
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/**
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* @test
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* @summary Basic isBlank functionality
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* @bug 8200436
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* @run main/othervm IsBlank
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*/
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public class IsBlank {
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public static void main(String... arg) {
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testIsBlank();
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testWhitespace();
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}
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/*
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* Test with strings
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*/
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static void testIsBlank() {
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test("", true);
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test(" ", true);
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test(" \t", true);
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test(" \u1680", true);
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test(" abc ", false);
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test(" abc\u2022", false);
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}
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/*
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* Test full whitespace range
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*/
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static void testWhitespace() {
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StringBuilder sb = new StringBuilder(64);
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IntStream.range(1, 0xFFFF).filter(c -> Character.isWhitespace(c))
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.forEach(c -> sb.append((char)c));
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String whiteSpace = sb.toString();
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test(whiteSpace, true);
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test(whiteSpace + "abc" + whiteSpace, false);
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}
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/*
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* Raise an exception if the two inputs are not equivalent.
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*/
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static void test(String input, boolean expected) {
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if (input.isBlank() != expected) {
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System.err.format("Failed test, Input: %s, Expected: %b%n", input, expected);
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throw new RuntimeException();
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}
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}
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}
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