1 /* 2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 import org.testng.annotations.DataProvider; 25 import org.testng.annotations.Test; 26 27 import java.io.File; 28 import java.io.IOException; 29 import java.io.UncheckedIOException; 30 31 import java.util.ArrayList; 32 import java.util.List; 33 import java.util.Scanner; 34 import java.util.function.Consumer; 35 import java.util.function.Supplier; 36 import java.util.regex.MatchResult; 37 import java.util.regex.Pattern; 38 import java.util.stream.LambdaTestHelpers; 39 import java.util.stream.OpTestCase; 40 import java.util.stream.Stream; 41 import java.util.stream.TestData; 42 43 import static org.testng.Assert.*; 44 45 /** 46 * @test 47 * @bug 8072722 48 * @summary Tests of stream support in java.util.Scanner 49 * @library ../stream/bootlib 50 * @build java.util.stream.OpTestCase 51 * @run testng/othervm ScannerStreamTest 52 */ 53 54 @Test 55 public class ScannerStreamTest extends OpTestCase { 56 57 static File inputFile = new File(System.getProperty("test.src", "."), "input.txt"); 58 59 @DataProvider(name = "Patterns") 60 public static Object[][] makeStreamTestData() { 61 // each inner array is [String description, String input, String delimiter] 62 // delimiter may be null 63 List<Object[]> data = new ArrayList<>(); 64 65 data.add(new Object[] { "default delimiter", "abc def ghi", null }); 66 data.add(new Object[] { "fixed delimiter", "abc,def,,ghi", "," }); 67 data.add(new Object[] { "regexp delimiter", "###abc##def###ghi###j", "#+" }); 68 69 return data.toArray(new Object[0][]); 70 } 71 72 Scanner makeScanner(String input, String delimiter) { 73 Scanner sc = new Scanner(input); 74 if (delimiter != null) { 75 sc.useDelimiter(delimiter); 76 } 77 return sc; 78 } 79 80 @Test(dataProvider = "Patterns") 81 public void tokensTest(String description, String input, String delimiter) { 82 // derive expected result by using conventional loop 83 Scanner sc = makeScanner(input, delimiter); 84 List<String> expected = new ArrayList<>(); 85 while (sc.hasNext()) { 86 expected.add(sc.next()); 87 } 88 89 Supplier<Stream<String>> ss = () -> makeScanner(input, delimiter).tokens(); 90 withData(TestData.Factory.ofSupplier(description, ss)) 91 .stream(LambdaTestHelpers.identity()) 92 .expectedResult(expected) 93 .exercise(); 94 } 95 96 Scanner makeFileScanner(File file) { 97 try { 98 return new Scanner(file, "UTF-8"); 99 } catch (IOException ioe) { 100 throw new UncheckedIOException(ioe); 101 } 102 } 103 104 public void findAllTest() { 105 // derive expected result by using conventional loop 106 Pattern pat = Pattern.compile("[A-Z]{7,}"); 107 List<String> expected = new ArrayList<>(); 108 109 try (Scanner sc = makeFileScanner(inputFile)) { 110 String match; 111 while ((match = sc.findWithinHorizon(pat, 0)) != null) { 112 expected.add(match); 113 } 114 } 115 116 Supplier<Stream<String>> ss = 117 () -> makeFileScanner(inputFile).findAll(pat).map(MatchResult::group); 118 119 withData(TestData.Factory.ofSupplier("findAllTest", ss)) 120 .stream(LambdaTestHelpers.identity()) 121 .expectedResult(expected) 122 .exercise(); 123 } 124 125 }