Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.apache.karaf.shell.tabletest; import java.io.PrintStream; import java.io.StringWriter; import junit.framework.Assert; import org.apache.commons.io.output.WriterOutputStream; import org.apache.karaf.shell.table.Col; import org.apache.karaf.shell.table.Row; import org.apache.karaf.shell.table.ShellTable; import org.junit.Test; public class ShellTableTest { @Test public void testTable() { ShellTable table = new ShellTable(); table.column(new Col("id").alignRight().maxSize(5)); table.column(new Col("Name").maxSize(20)); table.column(new Col("Centered").alignCenter()); table.addRow().addContent(1, "Test", "Description"); table.addRow().addContent(20, "My name", "Description"); Row row = table.addRow(); row.addContent(123456789); row.addContent("A very long text that should be cut"); row.addContent("A very long text that should not be cut"); StringWriter writer = new StringWriter(); PrintStream out = new PrintStream(new WriterOutputStream(writer)); table.print(out, true); out.flush(); String expected = " id | Name | Centered \n" + "----------------------------------------------------------------------\n" + " 1 | Test | Description \n" + " 20 | My name | Description \n" + "12345 | A very long text tha | A very long text that should not be cut\n"; Assert.assertEquals(expected, getString(writer)); } @Test public void testGrow() { ShellTable table = new ShellTable().size(10); table.column(new Col("1")); table.column(new Col("2")); table.addRow().addContent("1", "2"); StringWriter writer = new StringWriter(); PrintStream out = new PrintStream(new WriterOutputStream(writer)); table.print(out, true); out.flush(); String expected = "1 | 2\n" + "----------\n" + "1 | 2\n"; Assert.assertEquals(expected, getString(writer)); } @Test public void testShrink() { ShellTable table = new ShellTable().size(10); table.column(new Col("1").maxSize(5)); table.column(new Col("2").alignRight()); table.addRow().addContent("quite long", "and here an even longer text"); StringWriter writer = new StringWriter(); PrintStream out = new PrintStream(new WriterOutputStream(writer)); table.print(out, true); out.flush(); String expected = // "1 | 2\n" // + "----------\n" // + "quite | a\n"; Assert.assertEquals(expected, getString(writer)); } @Test public void testTooSmall() { ShellTable table = new ShellTable().size(2); table.column(new Col("1").maxSize(5)); table.column(new Col("2").alignRight()); table.addRow().addContent("quite long", "and here an even longer text"); StringWriter writer = new StringWriter(); PrintStream out = new PrintStream(new WriterOutputStream(writer)); table.print(out, true); out.flush(); String expected = // "1 | \n" + // "--------\n" + // "quite | \n"; Assert.assertEquals(expected, getString(writer)); } @Test public void testNoFormat() { ShellTable table = new ShellTable(); table.column(new Col("first")); table.column(new Col("second")); table.addRow().addContent("first column", "second column"); StringWriter writer = new StringWriter(); PrintStream out = new PrintStream(new WriterOutputStream(writer)); table.print(out, false); out.flush(); String expected = "first column\tsecond column\n"; Assert.assertEquals(expected, getString(writer)); } @Test public void testNoFormatWithCustomSeparator() { ShellTable table = new ShellTable(); table.separator(";"); table.column(new Col("first")); table.column(new Col("second")); table.addRow().addContent("first column", "second column"); StringWriter writer = new StringWriter(); PrintStream out = new PrintStream(new WriterOutputStream(writer)); table.print(out, false); out.flush(); String expected = "first column;second column\n"; Assert.assertEquals(expected, getString(writer)); } private String getString(StringWriter writer) { return writer.getBuffer().toString().replace("\r\n", "\n"); } }