/**
* 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.hadoop.fs;
import static org.junit.Assert.*;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.apache.hadoop.fs.shell.CommandFormat;
import org.apache.hadoop.fs.shell.CommandFormat.NotEnoughArgumentsException;
import org.apache.hadoop.fs.shell.CommandFormat.TooManyArgumentsException;
import org.apache.hadoop.fs.shell.CommandFormat.UnknownOptionException;
import org.junit.Before;
import org.junit.Test;
/**
* This class tests the command line parsing
*/
public class TestCommandFormat {
private static List<String> args;
private static List<String> expectedArgs;
private static Set<String> expectedOpts;
@Before
public void setUp() {
args = new ArrayList<String>();
expectedOpts = new HashSet<String>();
expectedArgs = new ArrayList<String>();
}
@Test
public void testNoArgs() {
checkArgLimits(null, 0, 0);
checkArgLimits(null, 0, 1);
checkArgLimits(NotEnoughArgumentsException.class, 1, 1);
checkArgLimits(NotEnoughArgumentsException.class, 1, 2);
}
@Test
public void testOneArg() {
args = listOf("a");
expectedArgs = listOf("a");
checkArgLimits(TooManyArgumentsException.class, 0, 0);
checkArgLimits(null, 0, 1);
checkArgLimits(null, 1, 1);
checkArgLimits(null, 1, 2);
checkArgLimits(NotEnoughArgumentsException.class, 2, 3);
}
@Test
public void testTwoArgs() {
args = listOf("a", "b");
expectedArgs = listOf("a", "b");
checkArgLimits(TooManyArgumentsException.class, 0, 0);
checkArgLimits(TooManyArgumentsException.class, 1, 1);
checkArgLimits(null, 1, 2);
checkArgLimits(null, 2, 2);
checkArgLimits(null, 2, 3);
checkArgLimits(NotEnoughArgumentsException.class, 3, 3);
}
@Test
public void testOneOpt() {
args = listOf("-a");
expectedOpts = setOf("a");
checkArgLimits(UnknownOptionException.class, 0, 0);
checkArgLimits(null, 0, 0, "a", "b");
checkArgLimits(NotEnoughArgumentsException.class, 1, 1, "a", "b");
}
@Test
public void testTwoOpts() {
args = listOf("-a", "-b");
expectedOpts = setOf("a", "b");
checkArgLimits(UnknownOptionException.class, 0, 0);
checkArgLimits(null, 0, 0, "a", "b");
checkArgLimits(null, 0, 1, "a", "b");
checkArgLimits(NotEnoughArgumentsException.class, 1, 1, "a", "b");
}
@Test
public void testOptArg() {
args = listOf("-a", "b");
expectedOpts = setOf("a");
expectedArgs = listOf("b");
checkArgLimits(UnknownOptionException.class, 0, 0);
checkArgLimits(TooManyArgumentsException.class, 0, 0, "a", "b");
checkArgLimits(null, 0, 1, "a", "b");
checkArgLimits(null, 1, 1, "a", "b");
checkArgLimits(null, 1, 2, "a", "b");
checkArgLimits(NotEnoughArgumentsException.class, 2, 2, "a", "b");
}
@Test
public void testArgOpt() {
args = listOf("b", "-a");
expectedArgs = listOf("b", "-a");
checkArgLimits(TooManyArgumentsException.class, 0, 0, "a", "b");
checkArgLimits(null, 1, 2, "a", "b");
checkArgLimits(null, 2, 2, "a", "b");
checkArgLimits(NotEnoughArgumentsException.class, 3, 4, "a", "b");
}
@Test
public void testOptStopOptArg() {
args = listOf("-a", "--", "-b", "c");
expectedOpts = setOf("a");
expectedArgs = listOf("-b", "c");
checkArgLimits(UnknownOptionException.class, 0, 0);
checkArgLimits(TooManyArgumentsException.class, 0, 1, "a", "b");
checkArgLimits(null, 2, 2, "a", "b");
checkArgLimits(NotEnoughArgumentsException.class, 3, 4, "a", "b");
}
@Test
public void testOptDashArg() {
args = listOf("-b", "-", "-c");
expectedOpts = setOf("b");
expectedArgs = listOf("-", "-c");
checkArgLimits(UnknownOptionException.class, 0, 0);
checkArgLimits(TooManyArgumentsException.class, 0, 0, "b", "c");
checkArgLimits(TooManyArgumentsException.class, 1, 1, "b", "c");
checkArgLimits(null, 2, 2, "b", "c");
checkArgLimits(NotEnoughArgumentsException.class, 3, 4, "b", "c");
}
@Test
public void testOldArgsWithIndex() {
String[] arrayArgs = new String[]{"ignore", "-a", "b", "-c"};
{
CommandFormat cf = new CommandFormat(0, 9, "a", "c");
List<String> parsedArgs = cf.parse(arrayArgs, 0);
assertEquals(setOf(), cf.getOpts());
assertEquals(listOf("ignore", "-a", "b", "-c"), parsedArgs);
}
{
CommandFormat cf = new CommandFormat(0, 9, "a", "c");
List<String> parsedArgs = cf.parse(arrayArgs, 1);
assertEquals(setOf("a"), cf.getOpts());
assertEquals(listOf("b", "-c"), parsedArgs);
}
{
CommandFormat cf = new CommandFormat(0, 9, "a", "c");
List<String> parsedArgs = cf.parse(arrayArgs, 2);
assertEquals(setOf(), cf.getOpts());
assertEquals(listOf("b", "-c"), parsedArgs);
}
}
private static <T> CommandFormat checkArgLimits(
Class<? extends IllegalArgumentException> expectedErr,
int min, int max, String ... opts)
{
CommandFormat cf = new CommandFormat(min, max, opts);
List<String> parsedArgs = new ArrayList<String>(args);
Class<?> cfError = null;
try {
cf.parse(parsedArgs);
} catch (IllegalArgumentException e) {
System.out.println(e.getMessage());
cfError = e.getClass();
}
assertEquals(expectedErr, cfError);
if (expectedErr == null) {
assertEquals(expectedArgs, parsedArgs);
assertEquals(expectedOpts, cf.getOpts());
}
return cf;
}
// Don't use generics to avoid warning:
// unchecked generic array creation of type T[] for varargs parameter
private static List<String> listOf(String ... objects) {
return Arrays.asList(objects);
}
private static Set<String> setOf(String ... objects) {
return new HashSet<String>(listOf(objects));
}
}