131 lines
4.4 KiB
Java
131 lines
4.4 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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/*
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* @test
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* @summary Unit tests for String#indent
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* @run main Indent
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*/
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import java.util.Arrays;
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import java.util.List;
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import java.util.stream.Collectors;
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import java.util.stream.Stream;
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public class Indent {
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static final List<String> ENDS = List.of("", "\n", " \n", "\n\n", "\n\n\n");
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static final List<String> MIDDLES = List.of(
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"",
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"xyz",
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" xyz",
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" xyz",
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"xyz ",
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" xyz ",
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" xyz ",
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"xyz\u2022",
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" xyz\u2022",
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"xyz\u2022 ",
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" xyz\u2022 ",
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" // comment"
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);
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public static void main(String[] args) {
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test1();
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}
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/*
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* Test String#indent(int n) functionality.
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*/
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static void test1() {
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for (int adjust : new int[] {-8, -7, -4, -3, -2, -1, 0, 1, 2, 3, 4, 7, 8}) {
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for (String prefix : ENDS) {
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for (String suffix : ENDS) {
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for (String middle : MIDDLES) {
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String input = prefix + " abc \n" + middle + "\n def \n" + suffix;
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String output = input.indent(adjust);
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Stream<String> stream = input.lines();
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if (adjust > 0) {
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final String spaces = " ".repeat(adjust);
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stream = stream.map(s -> spaces + s);
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} else if (adjust < 0) {
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stream = stream.map(s -> s.substring(Math.min(-adjust, indexOfNonWhitespace(s))));
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}
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String expected = stream.collect(Collectors.joining("\n", "", "\n"));
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if (!output.equals(expected)) {
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report("String::indent(int n)",
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"Result indentation not as expected", expected, output);
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}
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}
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}
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}
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}
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}
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public static int indexOfNonWhitespace(String s) {
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int left = 0;
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while (left < s.length()) {
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char ch = s.charAt(left);
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if (ch != ' ' && ch != '\t' && !Character.isWhitespace(ch)) {
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break;
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}
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left++;
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}
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return left;
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}
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private static String[] getBody(String[] inLines) {
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int from = -1, to = -1;
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for (int i = 0; i < inLines.length; i++) {
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String line = inLines[i];
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if (!line.isBlank()) {
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if (from == -1) {
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from = i;
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}
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to = i + 1;
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}
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}
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return Arrays.copyOfRange(inLines, from, to);
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}
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/*
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* Report difference in result.
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*/
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static void report(String test, String message, String input, String output) {
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System.err.println("Testing " + test + ": " + message);
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System.err.println();
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System.err.println("Input: length = " + input.length());
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System.err.println("_".repeat(40));
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System.err.print(input.replaceAll(" ", "."));
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System.err.println("_".repeat(40));
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System.err.println();
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System.err.println("Output: length = " + output.length());
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System.err.println("_".repeat(40));
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System.err.print(output.replaceAll(" ", "."));
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System.err.println("_".repeat(40));
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throw new RuntimeException();
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}
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}
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