Ant example source code file (JavaEnvUtilsTest.java)

This example Ant source code file (JavaEnvUtilsTest.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Ant tags/keywords

assertionfailederror, current, file_utils, fileutils, in, io, javaenvutilstest, javaenvutilstest, jdk, jdk, jre, jre, string, string, testcase

The JavaEnvUtilsTest.java source code

/*
 *  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.tools.ant.util;

import java.io.File;

import junit.framework.AssertionFailedError;
import junit.framework.TestCase;

import org.apache.tools.ant.taskdefs.condition.Os;

/**
 * TestCase for JavaEnvUtils.
 *
 */
public class JavaEnvUtilsTest extends TestCase {

    private static final FileUtils FILE_UTILS = FileUtils.getFileUtils();

    public JavaEnvUtilsTest(String s) {
        super(s);
    }

    public void testGetExecutableNetware() {
        if (Os.isName("netware")) {
            assertEquals("java", JavaEnvUtils.getJreExecutable("java"));
            assertEquals("javac", JavaEnvUtils.getJdkExecutable("javac"));
            assertEquals("foo", JavaEnvUtils.getJreExecutable("foo"));
            assertEquals("foo", JavaEnvUtils.getJdkExecutable("foo"));
        }
    }

    public void testGetExecutableWindows() {
        if (Os.isFamily("windows")) {
            String javaHome =
                FILE_UTILS.normalize(System.getProperty("java.home"))
                .getAbsolutePath();

            String j = JavaEnvUtils.getJreExecutable("java");
            assertTrue(j.endsWith(".exe"));
            assertTrue(j+" is absolute", (new File(j)).isAbsolute());
            try {
                assertTrue(j+" is normalized and in the JRE dir",
                           j.startsWith(javaHome));
            } catch (AssertionFailedError e) {
                // java.home is bogus
                assertEquals("java.exe", j);
            }

            j = JavaEnvUtils.getJdkExecutable("javac");
            assertTrue(j.endsWith(".exe"));
            try {
                assertTrue(j+" is absolute", (new File(j)).isAbsolute());
                String javaHomeParent =
                    FILE_UTILS.normalize(javaHome+"/..").getAbsolutePath();
                assertTrue(j+" is normalized and in the JDK dir",
                           j.startsWith(javaHomeParent));
                assertTrue(j+" is normalized and not in the JRE dir",
                           !j.startsWith(javaHome));

            } catch (AssertionFailedError e) {
                // java.home is bogus
                assertEquals("javac.exe", j);
            }

            assertEquals("foo.exe", JavaEnvUtils.getJreExecutable("foo"));
            assertEquals("foo.exe", JavaEnvUtils.getJdkExecutable("foo"));
        }
    }

    public void testGetExecutableMostPlatforms() {
        if (!Os.isName("netware") && !Os.isFamily("windows")) {
            String javaHome =
                FILE_UTILS.normalize(System.getProperty("java.home"))
                .getAbsolutePath();

            // could still be OS/2
            String extension = Os.isFamily("dos") ? ".exe" : "";

            String j = JavaEnvUtils.getJreExecutable("java");
            if (!extension.equals("")) {
                assertTrue(j.endsWith(extension));
            }
            assertTrue(j+" is absolute", (new File(j)).isAbsolute());
            assertTrue(j+" is normalized and in the JRE dir",
                       j.startsWith(javaHome));

            j = JavaEnvUtils.getJdkExecutable("javac");
            if (!extension.equals("")) {
                assertTrue(j.endsWith(extension));
            }
            assertTrue(j+" is absolute", (new File(j)).isAbsolute());

            String javaHomeParent =
                FILE_UTILS.normalize(javaHome+"/..").getAbsolutePath();
            assertTrue(j+" is normalized and in the JDK dir",
                       j.startsWith(javaHomeParent));

            if (Os.isFamily("mac")) {
                assertTrue(j+" is normalized and in the JRE dir",
                           j.startsWith(javaHome));
            } else {
                assertTrue(j+" is normalized and not in the JRE dir",
                           !j.startsWith(javaHome));
            }

            assertEquals("foo"+extension,
                         JavaEnvUtils.getJreExecutable("foo"));
            assertEquals("foo"+extension,
                         JavaEnvUtils.getJdkExecutable("foo"));
        }

    }

    public void testIsAtLeastJavaVersion()
    {
        assertTrue(
                "Current java version is not at least the current java version...",
                JavaEnvUtils.isAtLeastJavaVersion(JavaEnvUtils.getJavaVersion()));
        assertFalse(
                "In case the current java version is higher than 9.0 definitely a new algorithem will be needed",
                JavaEnvUtils.isAtLeastJavaVersion("9.0"));
    }

}