11d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert/* 21d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Copyright (C) 2008 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 java.io.ByteArrayInputStream; 201d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport java.io.IOException; 211d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport java.io.InputStream; 221d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 231d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert/** 241d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Unit tests for {@link CountingInputStream}. 251d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 261d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * @author Chris Nokleberg 271d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert */ 281d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertpublic class CountingInputStreamTest extends IoTestCase { 291d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert private CountingInputStream counter; 301d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 311d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override protected void setUp() throws Exception { 321d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert super.setUp(); 331d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert counter = new CountingInputStream(new ByteArrayInputStream(new byte[20])); 341d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 351d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 361d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public void testReadSingleByte() throws IOException { 371d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(0, counter.getCount()); 381d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(0, counter.read()); 391d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(1, counter.getCount()); 401d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 411d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 421d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public void testReadArray() throws IOException { 431d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(10, counter.read(new byte[10])); 441d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(10, counter.getCount()); 451d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 461d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 471d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public void testReadArrayRange() throws IOException { 481d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(3, counter.read(new byte[10], 1, 3)); 491d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(3, counter.getCount()); 501d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 511d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 521d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public void testSkip() throws IOException { 531d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(10, counter.skip(10)); 541d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(10, counter.getCount()); 551d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 561d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 571d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public void testSkipEOF() throws IOException { 581d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(20, counter.skip(30)); 591d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(20, counter.getCount()); 601d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(0, counter.skip(20)); 611d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(20, counter.getCount()); 621d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 631d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert // Test reading a single byte while we're in the right state 641d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(-1, counter.read()); 651d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(20, counter.getCount()); 661d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 671d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 681d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public void testReadArrayEOF() throws IOException { 691d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(20, counter.read(new byte[30])); 701d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(20, counter.getCount()); 711d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(-1, counter.read(new byte[30])); 721d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(20, counter.getCount()); 731d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 741d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 751d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public void testMark() throws Exception { 761d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertTrue(counter.markSupported()); 771d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(10, counter.read(new byte[10])); 781d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(10, counter.getCount()); 791d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert counter.mark(5); 801d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert counter.read(); 811d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(11, counter.getCount()); 821d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert counter.reset(); 831d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(10, counter.getCount()); 841d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(10, counter.skip(100)); 851d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(20, counter.getCount()); 861d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 871d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 881d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public void testMarkNotSet() { 891d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert try { 901d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert counter.reset(); 911d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert fail(); 921d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } catch (IOException expected) { 931d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals("Mark not set", expected.getMessage()); 941d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 951d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 961d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 971d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public void testMarkNotSupported() { 981d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert counter = new CountingInputStream(new UnmarkableInputStream()); 991d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 1001d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert try { 1011d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert counter.reset(); 1021d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert fail(); 1031d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } catch (IOException expected) { 1041d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals("Mark not supported", expected.getMessage()); 1051d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 1061d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 1071d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 1081d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert private static class UnmarkableInputStream extends InputStream { 1091d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override 1101d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public int read() throws IOException { 1111d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return 0; 1121d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 1131d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 1141d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override 1151d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public boolean markSupported() { 1161d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return false; 1171d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 1181d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 1191d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert} 120