com.igormaznitsa.jcp.it.maven.ITPreprocessorMojo.java Source code

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Here is the source code for com.igormaznitsa.jcp.it.maven.ITPreprocessorMojo.java

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/* 
 * Copyright 2014 Igor Maznitsa (http://www.igormaznitsa.com).
 *
 * 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.igormaznitsa.jcp.it.maven;

import java.io.*;
import java.util.Arrays;
import java.util.List;
import java.util.jar.*;
import org.apache.commons.io.IOUtils;
import org.apache.maven.it.Verifier;
import org.apache.maven.it.util.ResourceExtractor;
import org.apache.maven.shared.jar.JarAnalyzer;
import static org.junit.Assert.*;
import org.junit.BeforeClass;
import org.junit.Test;

@SuppressWarnings("unchecked")
public class ITPreprocessorMojo {

    private static void assertMainClass(final String jarFile, final String mainClass) throws Exception {
        JarInputStream jarStream = null;
        try {
            jarStream = new JarInputStream(new FileInputStream(jarFile));
            final Manifest manifest = jarStream.getManifest();
            final Attributes attrs = manifest.getMainAttributes();
            assertEquals("Maven plugin must also provide and main class in manifest", mainClass,
                    attrs.getValue("Main-Class"));
        } finally {
            IOUtils.closeQuietly(jarStream);
        }
    }

    @BeforeClass
    public static void setUpBeforeClass() throws Exception {
        assertNotNull("The test desires the ${maven.home} system property", System.getProperty("maven.home"));

        final String jarFile = System.getProperty("plugin.jar");
        final String pomFile = System.getProperty("project.pom");

        final File testDir = ResourceExtractor.simpleExtractResources(ITPreprocessorMojo.class,
                "dummy_maven_project");
        final Verifier verifier = new Verifier(testDir.getAbsolutePath());

        verifier.assertFilePresent(jarFile);
        verifier.assertFilePresent(pomFile);

        final String processedJarFileName = (jarFile.indexOf(' ') >= 0 ? "\"" + jarFile + "\"" : jarFile)
                .replace('/', File.separatorChar).replace('\\', File.separatorChar);
        final String processedPomFile = (pomFile.indexOf(' ') >= 0 ? "\"" + pomFile + "\"" : pomFile)
                .replace('/', File.separatorChar).replace('\\', File.separatorChar);

        // check that manifest contains main class
        assertMainClass(jarFile, "com.igormaznitsa.jcp.JCPreprocessor");

        verifier.setCliOptions(Arrays.asList("-Dfile=" + processedJarFileName, "-DpomFile=" + processedPomFile));
        verifier.executeGoal("install:install-file");

        verifier.verifyErrorFreeLog();
    }

    private static JarEntry findClassEntry(final JarAnalyzer jar, final String path) {
        for (final JarEntry e : (List<JarEntry>) jar.getClassEntries()) {
            if (path.equals(e.getName())) {
                return e;
            }
        }
        return null;
    }

    @Test
    @SuppressWarnings("unchecked")
    public void testPreprocessorUsage() throws Exception {
        final File testDir = ResourceExtractor.simpleExtractResources(this.getClass(), "./dummy_maven_project");

        final Verifier verifier = new Verifier(testDir.getAbsolutePath());

        verifier.deleteArtifact("com.igormaznitsa", "DummyMavenProjectToTestJCP", "1.0-SNAPSHOT", "jar");
        verifier.executeGoal("package");
        assertFalse("Folder must be removed", new File("./dummy_maven_project/target").exists());

        final File resultJar = ResourceExtractor.simpleExtractResources(this.getClass(),
                "./dummy_maven_project/DummyMavenProjectToTestJCP-1.0-SNAPSHOT.jar");

        verifier.verifyErrorFreeLog();
        verifier.verifyTextInLog("PREPROCESSED_TESTING_COMPLETED");
        verifier.verifyTextInLog("Cleaning has been started");
        verifier.verifyTextInLog("Removing preprocessed source folder");
        verifier.verifyTextInLog("Removing preprocessed test source folder");
        verifier.verifyTextInLog("Scanning for deletable directories");
        verifier.verifyTextInLog("Deleting directory:");
        verifier.verifyTextInLog("Cleaning has been completed");
        verifier.verifyTextInLog(" mvn.project.property.some.datapass.base=***** ");
        verifier.verifyTextInLog(" mvn.project.property.some.private.key=***** ");

        final JarAnalyzer jarAnalyzer = new JarAnalyzer(resultJar);
        List<JarEntry> classEntries;
        try {
            classEntries = (List<JarEntry>) jarAnalyzer.getClassEntries();

            for (final JarEntry ce : classEntries) {
                assertFalse(ce.getName().contains("excludedfolder"));
            }

            assertEquals("Must have only class", 1, classEntries.size());
            final JarEntry classEntry = classEntries.get(0);
            assertNotNull(findClassEntry(jarAnalyzer, "com/igormaznitsa/dummyproject/testmain2.class"));

            DataInputStream inStream = null;
            final byte[] buffer = new byte[(int) classEntry.getSize()];
            Class<?> instanceClass = null;
            try {
                inStream = new DataInputStream(jarAnalyzer.getEntryInputStream(classEntry));
                inStream.readFully(buffer);

                instanceClass = new ClassLoader() {

                    public Class<?> loadClass(final byte[] data) throws ClassNotFoundException {
                        return defineClass(null, data, 0, data.length);
                    }
                }.loadClass(buffer);
            } finally {
                IOUtils.closeQuietly(inStream);
            }

            if (instanceClass != null) {
                final Object instance = instanceClass.newInstance();
                assertEquals("Must return the project name", "Dummy Maven Project To Test JCP",
                        instanceClass.getMethod("test").invoke(instance));
            } else {
                fail("Unexpected state");
            }
        } finally {
            jarAnalyzer.closeQuietly();
        }
    }
}