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package org.apache.commons.cli;
import java.io.ByteArrayOutputStream;
import java.io.PrintWriter;
import junit.framework.TestCase;
public class HelpFormatterTest extends TestCase {
private Options _options;
protected void setUp() {
_options = new Options();
Option aOption = new Option("a", "Aa", false, "option A");
Option bOption = new Option("b", "Bb", false, "option B");
OptionGroup group1 = new OptionGroup();
group1.addOption(aOption);
group1.addOption(bOption);
_options.addOptionGroup(group1);
}
/**
* the setUp above used to print [-a | -b] [-a] [-b]
*/
public void testOptionGroupDuplication() {
String help = unifyNewLines(getFormattedHelp());
String expectedHelp = unifyNewLines(new String("usage: syntax [-a | -b]\n-a,--Aa option A\n-b,--Bb option B\n"));
assertEquals("expected usage to be '" + expectedHelp + "' instead of '" + help + "'",
expectedHelp,
help);
}
/**
* Options following an option group used to be non blank separated: [-b | -a][-o] instead of
* [-b | -a] [-o]
*/
public void testOptionGroupSubsequentOptions() {
_options.addOption(new Option("o", "Option O"));
String help = getFormattedHelp();
assertTrue(help.indexOf("][") < 0);
assertTrue(help.indexOf("[-a | -b] [-o]") >= 0);
}
//
// private methods
//
private String getFormattedHelp() {
HelpFormatter formatter = new HelpFormatter();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
PrintWriter pw = new PrintWriter(baos);
formatter.printHelp(pw, 60, "syntax", null, _options, 0, 1, null, true);
pw.flush();
String usage = baos.toString();
return usage;
}
/**
* replace the windows specific \r\n line endings with java like \n line endings
*
* @param in
* The string to be transformed
* @return The string with unified line endings
*/
private String unifyNewLines(String in) {
char[] inChars = in.toCharArray();
StringBuilder b = new StringBuilder(inChars.length);
for (int i = 0; i < inChars.length; i++) {
char current = inChars[i];
if (current == '\r') {
if (i < inChars.length) {
char next = inChars[i + 1];
if (next == '\n') {
i++;
current = next;
}
}
}
b.append(current);
}
return b.toString();
}
}
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