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/*
* Copyright (c) 2018, 2021, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2018, 2020 SAP SE. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/**
* @test
* @summary Validate and test -?, -h and --help flags. All tools in the jdk
* should take the same flags to display the help message. These
* flags should be documented in the printed help message. The
* tool should quit without error code after displaying the
* help message (if there is no other problem with the command
* line).
* Also check that tools that used to accept -help still do
* so. Test that tools that never accepted -help don't do so
* in future. I.e., check that the tool returns with the same
* return code as called with an invalid flag, and does not
* print anything containing '-help' in that case.
* @compile HelpFlagsTest.java
* @run main HelpFlagsTest
*/
import java.io.File;
public class HelpFlagsTest extends TestHelper {
// Tools that should not be tested because a usage message is pointless.
static final String[] TOOLS_NOT_TO_TEST = {
"appletviewer", // deprecated, don't test
"jaccessinspector", // gui, don't test, win only
"jaccessinspector-32", // gui, don't test, win-32 only
"jaccesswalker", // gui, don't test, win only
"jaccesswalker-32", // gui, don't test, win-32 only
"jconsole", // gui, don't test
"servertool", // none. Shell, don't test.
"javaw", // don't test, win only
// These shall have a help message that resembles that of
// MIT's tools. Thus -?, -h and --help are supported, but not
// mentioned in the help text.
"kinit",
"klist",
"ktab",
// Oracle proprietary tools without help message.
"javacpl",
"jmc",
"jweblauncher",
"jcontrol",
"ssvagent"
};
// Lists which tools support which flags.
private static class ToolHelpSpec {
String toolname;
// How the flags supposed to be supported are handled.
//
// These flags are supported, i.e.,
// * the tool accepts the flag
// * the tool prints a help message if the flag is specified
// * this help message lists the flag
// * the tool exits with exit code '0'.
boolean supportsQuestionMark;
boolean supportsH;
boolean supportsHelp;
// One tool returns with exit code != '0'.
int exitcodeOfHelp;
// How legacy -help is handled.
//
// Tools that so far support -help should still do so, but
// not print documentation about it. Tools that do not
// support -help should not do so in future.
//
// The tools accepts legacy -help. -help should not be
// documented in the usage message.
boolean supportsLegacyHelp;
// Java itself documents -help. -help prints to stderr,
// while --help prints to stdout. Leave as is.
boolean documentsLegacyHelp;
// The exit code of the tool if an invalid argument is passed to it.
// An exit code != 0 would be expected, but not all tools handle it
// that way.
int exitcodeOfWrongFlag;
ToolHelpSpec(String n, int q, int h, int hp, int ex1, int l, int dl, int ex2) {
toolname = n;
supportsQuestionMark = ( q == 1 ? true : false );
supportsH = ( h == 1 ? true : false );
supportsHelp = ( hp == 1 ? true : false );
exitcodeOfHelp = ex1;
supportsLegacyHelp = ( l == 1 ? true : false );
documentsLegacyHelp = ( dl == 1 ? true : false );
exitcodeOfWrongFlag = ex2;
}
}
static ToolHelpSpec[] jdkTools = {
// name -? -h --help exitcode -help -help exitcode
// of help docu of wrong
// mented flag
new ToolHelpSpec("jabswitch", 0, 0, 0, 0, 0, 0, 0), // /?, prints help message anyways, win only
new ToolHelpSpec("jar", 1, 1, 1, 0, 0, 0, 1), // -?, -h, --help
new ToolHelpSpec("jarsigner", 1, 1, 1, 0, 1, 0, 1), // -?, -h, --help, -help accepted but not documented.
new ToolHelpSpec("java", 1, 1, 1, 0, 1, 1, 1), // -?, -h, --help -help, Documents -help
new ToolHelpSpec("javac", 1, 0, 1, 0, 1, 1, 2), // -?, --help -help, Documents -help, -h is already taken for "native header output directory".
new ToolHelpSpec("javadoc", 1, 1, 1, 0, 1, 1, 1), // -?, -h, --help -help, Documents -help
new ToolHelpSpec("javap", 1, 1, 1, 0, 1, 1, 2), // -?, -h, --help -help, Documents -help
new ToolHelpSpec("javaw", 1, 1, 1, 0, 1, 1, 1), // -?, -h, --help -help, Documents -help, win only
new ToolHelpSpec("jcmd", 1, 1, 1, 0, 1, 0, 1), // -?, -h, --help, -help accepted but not documented.
new ToolHelpSpec("jdb", 1, 1, 1, 0, 1, 1, 0), // -?, -h, --help -help, Documents -help
new ToolHelpSpec("jdeprscan", 1, 1, 1, 0, 0, 0, 1), // -?, -h, --help
new ToolHelpSpec("jdeps", 1, 1, 1, 0, 1, 0, 2), // -?, -h, --help, -help accepted but not documented.
new ToolHelpSpec("jfr", 1, 1, 1, 0, 0, 0, 2), // -?, -h, --help
new ToolHelpSpec("jhsdb", 0, 0, 0, 0, 0, 0, 0), // none, prints help message anyways.
new ToolHelpSpec("jimage", 1, 1, 1, 0, 0, 0, 2), // -?, -h, --help
new ToolHelpSpec("jinfo", 1, 1, 1, 0, 1, 1, 1), // -?, -h, --help -help, Documents -help
new ToolHelpSpec("jjs", 0, 1, 1, 100, 0, 0, 100), // -h, --help, return code 100
new ToolHelpSpec("jlink", 1, 1, 1, 0, 0, 0, 2), // -?, -h, --help
new ToolHelpSpec("jmap", 1, 1, 1, 0, 1, 0, 1), // -?, -h, --help, -help accepted but not documented.
new ToolHelpSpec("jmod", 1, 1, 1, 0, 1, 0, 2), // -?, -h, --help, -help accepted but not documented.
new ToolHelpSpec("jps", 1, 1, 1, 0, 1, 1, 1), // -?, -h, --help -help, Documents -help
new ToolHelpSpec("jrunscript", 1, 1, 1, 0, 1, 1, 7), // -?, -h, --help -help, Documents -help
new ToolHelpSpec("jshell", 1, 1, 1, 0, 1, 0, 1), // -?, -h, --help, -help accepted but not documented.
new ToolHelpSpec("jstack", 1, 1, 1, 0, 1, 1, 1), // -?, -h, --help -help, Documents -help
new ToolHelpSpec("jstat", 1, 1, 1, 0, 1, 1, 1), // -?, -h, --help -help, Documents -help
new ToolHelpSpec("jstatd", 1, 1, 1, 0, 0, 0, 1), // -?, -h, --help
new ToolHelpSpec("keytool", 1, 1, 1, 0, 1, 0, 1), // none, prints help message anyways.
new ToolHelpSpec("rmiregistry", 0, 0, 0, 0, 0, 0, 1), // none, prints help message anyways.
new ToolHelpSpec("serialver", 0, 0, 0, 0, 0, 0, 1), // none, prints help message anyways.
new ToolHelpSpec("jpackage", 0, 1, 1, 0, 0, 1, 1), // -h, --help,
new ToolHelpSpec("jwebserver", 1, 1, 1, 0, 0, 1, 1), // -?, -h, --help
};
// Returns corresponding object from jdkTools array.
static ToolHelpSpec getToolHelpSpec(String tool) {
for (ToolHelpSpec x : jdkTools) {
if (tool.toLowerCase().equals(x.toolname) ||
tool.toLowerCase().equals(x.toolname + ".exe"))
return x;
}
return null;
}
// Check whether 'flag' appears in 'line' as a word of itself. It must not
// be a substring of a word, as then similar flags might be matched.
// E.g.: --help matches in the documentation of --help-extra.
// This works only with english locale, as some tools have translated
// usage messages.
static boolean findFlagInLine(String line, String flag) {
if (line.contains(flag) &&
!line.contains("nknown") && // Some tools say 'Unknown option "<flag>"',
!line.contains("invalid flag") && // 'invalid flag: <flag>'
!line.contains("invalid option") && // or 'invalid option: <flag>'. Skip that.
!line.contains("FileNotFoundException: -help") && // Special case for idlj.
!line.contains("-h requires an argument") && // Special case for javac.
!line.contains("port argument,")) { // Special case for rmiregistry.
// There might be several appearances of 'flag' in
// 'line'. (-h as substring of --help).
int flagLen = flag.length();
int lineLen = line.length();
for (int i = line.indexOf(flag); i >= 0; i = line.indexOf(flag, i+1)) {
// There should be a space before 'flag' in 'line', or it's right at the beginning.
if (i > 0 &&
line.charAt(i-1) != ' ' &&
line.charAt(i-1) != '[' && // jarsigner
line.charAt(i-1) != '|' && // jstatd
line.charAt(i-1) != '\t') { // jjs
continue;
}
// There should be a space or comma after 'flag' in 'line', or it's just at the end.
int posAfter = i + flagLen;
if (posAfter < lineLen &&
line.charAt(posAfter) != ' ' &&
line.charAt(posAfter) != ',' &&
line.charAt(posAfter) != '[' && // jar
line.charAt(posAfter) != ']' && // jarsigner
line.charAt(posAfter) != ')' && // jfr
line.charAt(posAfter) != '|' && // jstatd
line.charAt(posAfter) != ':' && // jps
line.charAt(posAfter) != '"') { // keytool
continue;
}
return true;
}
}
return false;
}
static TestResult runToolWithFlag(File f, String flag) {
String x = f.getAbsolutePath();
TestResult tr = doExec(x, flag);
System.out.println("Testing " + f.getName());
System.out.println("#> " + x + " " + flag);
tr.testOutput.forEach(System.out::println);
System.out.println("#> echo $?");
System.out.println(tr.exitValue);
return tr;
}
// Checks whether tool supports flag 'flag' and documents it
// in the help message.
static String testTool(File f, String flag, int exitcode) {
String result = "";
TestResult tr = runToolWithFlag(f, flag);
// Check that the tool accepted the flag.
if (exitcode == 0 && !tr.isOK()) {
System.out.println("failed");
result = "failed: " + f.getName() + " " + flag + " has exit code " + tr.exitValue + ".\n";
}
// Check there is a help message listing the flag.
boolean foundFlag = false;
for (String y : tr.testOutput) {
if (!foundFlag && findFlagInLine(y, flag)) { // javac
foundFlag = true;
System.out.println("Found documentation of '" + flag + "': '" + y.trim() +"'");
}
}
if (!foundFlag) {
result += "failed: " + f.getName() + " does not document " +
flag + " in help message.\n";
}
if (!result.isEmpty())
System.out.println(result);
return result;
}
// Test the tool supports legacy option -help, but does
// not document it.
static String testLegacyFlag(File f, int exitcode) {
String result = "";
TestResult tr = runToolWithFlag(f, "-help");
// Check that the tool accepted the flag.
if (exitcode == 0 && !tr.isOK()) {
System.out.println("failed");
result = "failed: " + f.getName() + " -help has exit code " + tr.exitValue + ".\n";
}
// Check there is _no_ documentation of -help.
boolean foundFlag = false;
for (String y : tr.testOutput) {
if (!foundFlag && findFlagInLine(y, "-help")) { // javac
foundFlag = true;
System.out.println("Found documentation of '-help': '" + y.trim() +"'");
}
}
if (foundFlag) {
result += "failed: " + f.getName() + " does document -help " +
"in help message. This legacy flag should not be documented.\n";
}
if (!result.isEmpty())
System.out.println(result);
return result;
}
// Test that the tool exits with the exit code expected for
// invalid flags. In general, one would expect this to be != 0,
// but currently a row of tools exit with 0 in this case.
// The output should not ask to get help with flag '-help'.
static String testInvalidFlag(File f, String flag, int exitcode, boolean documentsLegacyHelp) {
String result = "";
TestResult tr = runToolWithFlag(f, flag);
// Check that the tool did exit with the expected return code.
if (!((exitcode == tr.exitValue) ||
// Windows reports -1 where unix reports 255.
(tr.exitValue < 0 && exitcode == tr.exitValue + 256))) {
System.out.println("failed");
result = "failed: " + f.getName() + " " + flag + " should not be " +
"accepted. But it has exit code " + tr.exitValue + ".\n";
}
if (!documentsLegacyHelp) {
// Check there is _no_ documentation of -help.
boolean foundFlag = false;
for (String y : tr.testOutput) {
if (!foundFlag && findFlagInLine(y, "-help")) { // javac
foundFlag = true;
System.out.println("Found documentation of '-help': '" + y.trim() +"'");
}
}
if (foundFlag) {
result += "failed: " + f.getName() + " does document -help " +
"in error message. This legacy flag should not be documented.\n";
}
}
if (!result.isEmpty())
System.out.println(result);
return result;
}
public static void main(String[] args) {
String errorMessage = "";
// The test analyses the help messages printed. It assumes englisch
// help messages. Thus it only works with english locale.
if (!isEnglishLocale()) { return; }
for (File f : new File(JAVA_BIN).listFiles(new ToolFilter(TOOLS_NOT_TO_TEST))) {
String toolName = f.getName();
ToolHelpSpec tool = getToolHelpSpec(toolName);
if (tool == null) {
errorMessage += "Tool " + toolName + " not covered by this test. " +
"Add specification to jdkTools array!\n";
continue;
}
// Test for help flags to be supported.
if (tool.supportsQuestionMark == true) {
errorMessage += testTool(f, "-?", tool.exitcodeOfHelp);
} else {
System.out.println("Skip " + tool.toolname + ". It does not support -?.");
}
if (tool.supportsH == true) {
errorMessage += testTool(f, "-h", tool.exitcodeOfHelp);
} else {
System.out.println("Skip " + tool.toolname + ". It does not support -h.");
}
if (tool.supportsHelp == true) {
errorMessage += testTool(f, "--help", tool.exitcodeOfHelp);
} else {
System.out.println("Skip " + tool.toolname + ". It does not support --help.");
}
// Check that the return code listing in jdkTools[] is
// correct for an invalid flag.
errorMessage += testInvalidFlag(f, "-asdfxgr", tool.exitcodeOfWrongFlag, tool.documentsLegacyHelp);
// Test for legacy -help flag.
if (!tool.documentsLegacyHelp) {
if (tool.supportsLegacyHelp == true) {
errorMessage += testLegacyFlag(f, tool.exitcodeOfHelp);
} else {
errorMessage += testInvalidFlag(f, "-help", tool.exitcodeOfWrongFlag, false);
}
}
}
if (errorMessage.isEmpty()) {
System.out.println("All help string tests: PASS");
} else {
throw new AssertionError("HelpFlagsTest failed:\n" + errorMessage);
}
}
}
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