Java tutorial
/* * Copyright (C) 2007-2010 Institute for Computational Biomedicine, * Weill Medical College of Cornell University * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package edu.cornell.med.icb.io; import org.apache.commons.io.IOUtils; import org.apache.commons.io.input.NullReader; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertFalse; import static org.junit.Assert.assertTrue; import static org.junit.Assert.fail; import org.junit.Test; import java.io.IOException; import java.io.StringReader; /** * Some simple validation on the {@link edu.cornell.med.icb.io.TSVReader}. */ public class TestTSVReader { /** * Test a stream has no data. */ @Test public void testEmptyStream() throws IOException { final TSVReader reader = new TSVReader(new NullReader(0)); assertFalse("Null reader should have no lines", reader.hasNext()); } /** * Test a stream that contains no tabs. */ @Test public void testNoTabs() throws IOException { final String foo = "The quick brown fox jumps over the lazy dog." + IOUtils.LINE_SEPARATOR + "How now brown cow" + IOUtils.LINE_SEPARATOR + "See Spot run. Run spot run!"; final TSVReader reader = new TSVReader(new StringReader(foo)); assertTrue(reader.hasNext()); reader.next(); assertEquals("Line should have a single token", 1, reader.numTokens()); assertEquals("The quick brown fox jumps over the lazy dog.", reader.getString()); assertTrue(reader.hasNext()); reader.next(); assertEquals("Line should have a single token", 1, reader.numTokens()); assertEquals("How now brown cow", reader.getString()); assertTrue(reader.hasNext()); reader.next(); assertEquals("Line should have a single token", 1, reader.numTokens()); assertEquals("See Spot run. Run spot run!", reader.getString()); assertFalse("Should have no lines", reader.hasNext()); } /** * Test close functionality. */ @Test public void testClose() throws IOException { final TSVReader reader = new TSVReader(new NullReader(42)); assertTrue("There should be something here", reader.hasNext()); reader.close(); try { assertFalse("Reader should be closed", reader.hasNext()); } catch (IOException e) { // this is good... return; } fail("TSVReader should be closed"); } }