11d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert/* 21d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Copyright (C) 2007 The Guava Authors 31d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 41d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Licensed under the Apache License, Version 2.0 (the "License"); 51d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * you may not use this file except in compliance with the License. 61d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * You may obtain a copy of the License at 71d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 81d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * http://www.apache.org/licenses/LICENSE-2.0 91d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 101d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Unless required by applicable law or agreed to in writing, software 111d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * distributed under the License is distributed on an "AS IS" BASIS, 121d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 131d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * See the License for the specific language governing permissions and 141d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * limitations under the License. 151d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert */ 161d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 171d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertpackage com.google.common.io; 181d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 191d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport com.google.common.collect.Lists; 201d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 211d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport java.io.ByteArrayInputStream; 221d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport java.io.FilterInputStream; 231d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport java.io.IOException; 241d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport java.io.InputStream; 251d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport java.util.Collections; 261d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport java.util.List; 271d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 281d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert/** 291d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Test class for {@link MultiInputStream}. 301d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 311d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * @author Chris Nokleberg 321d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert */ 331d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertpublic class MultiInputStreamTest extends IoTestCase { 341d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 351d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public void testJoin() throws Exception { 361d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert joinHelper(0); 371d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert joinHelper(1); 381d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert joinHelper(0, 0, 0); 391d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert joinHelper(10, 20); 401d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert joinHelper(10, 0, 20); 411d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert joinHelper(0, 10, 20); 421d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert joinHelper(10, 20, 0); 431d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert joinHelper(10, 20, 1); 441d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert joinHelper(1, 1, 1, 1, 1, 1, 1, 1); 451d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert joinHelper(1, 0, 1, 0, 1, 0, 1, 0); 461d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 471d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 481d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public void testOnlyOneOpen() throws Exception { 491d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert final InputSupplier<InputStream> supplier = newByteSupplier(0, 50); 501d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert final int[] counter = new int[1]; 511d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert InputSupplier<InputStream> checker = new InputSupplier<InputStream>() { 521d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override 531d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public InputStream getInput() throws IOException { 541d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert if (counter[0]++ != 0) { 551d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert throw new IllegalStateException("More than one supplier open"); 561d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 571d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return new FilterInputStream(supplier.getInput()) { 581d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override public void close() throws IOException { 591d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert super.close(); 601d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert counter[0]--; 611d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 621d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert }; 631d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 641d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert }; 651d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @SuppressWarnings("unchecked") 661d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert byte[] result = ByteStreams.toByteArray( 671d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert ByteStreams.join(checker, checker, checker)); 681d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(150, result.length); 691d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 701d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 711d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert private void joinHelper(Integer... spans) throws Exception { 721d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert List<InputSupplier<InputStream>> suppliers = Lists.newArrayList(); 731d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert int start = 0; 741d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert for (Integer span : spans) { 751d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert suppliers.add(newByteSupplier(start, span)); 761d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert start += span; 771d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 781d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert InputSupplier<InputStream> joined = ByteStreams.join(suppliers); 791d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertTrue(ByteStreams.equal(newByteSupplier(0, start), joined)); 801d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 811d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 821d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public void testReadSingleByte() throws Exception { 831d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert InputSupplier<InputStream> supplier = newByteSupplier(0, 10); 841d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @SuppressWarnings("unchecked") 851d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert InputSupplier<InputStream> joined = ByteStreams.join(supplier, supplier); 861d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(20, ByteStreams.length(joined)); 871d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert InputStream in = joined.getInput(); 881d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertFalse(in.markSupported()); 891d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(10, in.available()); 901d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert int total = 0; 911d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert while (in.read() != -1) { 921d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert total++; 931d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 941d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(0, in.available()); 951d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(20, total); 961d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 971d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 981d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public void testSkip() throws Exception { 991d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert MultiInputStream multi = new MultiInputStream( 1001d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert Collections.singleton(new InputSupplier<InputStream>() { 1011d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override 1021d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public InputStream getInput() { 1031d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return new ByteArrayInputStream(newPreFilledByteArray(0, 50)) { 1041d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override public long skip(long n) { 1051d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return 0; 1061d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 1071d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert }; 1081d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 1091d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert }).iterator()); 1101d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert multi.skip(-1); 1111d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert multi.skip(-1); 1121d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert multi.skip(0); 1131d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert ByteStreams.skipFully(multi, 20); 1141d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(20, multi.read()); 1151d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 1161d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 1171d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert private static InputSupplier<InputStream> newByteSupplier(final int start, final int size) { 1181d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return new InputSupplier<InputStream>() { 1191d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override 1201d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public InputStream getInput() { 1211d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return new ByteArrayInputStream(newPreFilledByteArray(start, size)); 1221d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 1231d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert }; 1241d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 1251d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert} 126