com.github.dmyersturnbull.transformations.CommandLineHelperTest.java Source code

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Here is the source code for com.github.dmyersturnbull.transformations.CommandLineHelperTest.java

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/*
   Copyright 2015 PharmGKB
         2015 Douglas Myers-Turnbull
    
   Licensed 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 com.github.dmyersturnbull.transformations;

import org.apache.commons.cli.Option;
import org.junit.Test;

import java.io.BufferedWriter;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.Arrays;
import java.util.Optional;

import static org.junit.Assert.*;

/**
 * Tests {@link CommandLineHelper}.
 * @author Douglas Myers-Turnbull
 */
public class CommandLineHelperTest {

    @Test
    public void testParse() throws Exception {
        Optional<ExtendedCommandLine> cl = new CommandLineHelper()
                .addOptions(Option.builder().argName("test").longOpt("test").build()).parse("--test", "testit!");
        assertTrue(cl.isPresent());
    }

    @Test
    public void testFailParse() throws Exception {
        Optional<ExtendedCommandLine> cl = new CommandLineHelper()
                .addOptions(Option.builder().argName("test").longOpt("test").build()).parse("--r", "testit!");
        assertFalse(cl.isPresent());
    }

    @Test
    public void testMultiargs() throws Exception {
        Optional<ExtendedCommandLine> cl = new CommandLineHelper()
                .addOptions(
                        Option.builder().argName("t").longOpt("t").numberOfArgs(Option.UNLIMITED_VALUES).build())
                .parse("-t", "1", "-t", "2", "-t", "3");
        assertTrue(cl.isPresent());
        assertEquals(Arrays.asList(1, 2, 3), cl.get().getListOf("t", Integer::new));
    }

    @Test(expected = IllegalArgumentException.class)
    public void testDuplicateOption() throws Exception {
        new CommandLineHelper().addOptions(Option.builder().argName("test").longOpt("test").build())
                .addOptions(Option.builder().argName("test").longOpt("test").required().build()).parse();
    }

    @Test
    public void testPrintHelp() throws Exception {
        StringWriter sw = new StringWriter();
        new CommandLineHelper().setClass(CommandLineHelperTest.class)
                .addOptions(Option.builder().argName("test").longOpt("test").build())
                .setHelpHeader("This is a header").setHelpFooter("This is a footer")
                .printHelp(new PrintWriter(new BufferedWriter(sw)));
        assertEquals("usage: CommandLineHelperTest [-h] [--test]\n" + "This is a header\n"
                + "-h,--helpPrint usage\n" + "   --test\n" + "This is a footer\n", sw.toString());
    }

}