core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4768NearestMatchConflictResolutionTest.java

/*
 * 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.maven.it;

import java.io.File;
import java.util.List;

import org.apache.maven.shared.verifier.Verifier;
import org.apache.maven.shared.verifier.util.ResourceExtractor;
import org.junit.jupiter.api.Test;

/**
 * This is a test set for <a href="https://issues.apache.org/jira/browse/MNG-4768">MNG-4768</a>.
 *
 * @author Benjamin Bentmann
 */
public class MavenITmng4768NearestMatchConflictResolutionTest extends AbstractMavenIntegrationTestCase {

    public MavenITmng4768NearestMatchConflictResolutionTest() {
        super("[2.0.9,)");
    }

    // Ideally, all six permutations of the three direct dependencies should yield the same result...

    @Test
    public void testitABD() throws Exception {
        testit("test-abd");
    }

    @Test
    public void testitADB() throws Exception {
        requiresMavenVersion("[3.0-beta-3,)");
        testit("test-adb");
    }

    @Test
    public void testitBAD() throws Exception {
        testit("test-bad");
    }

    @Test
    public void testitBDA() throws Exception {
        testit("test-bda");
    }

    @Test
    public void testitDAB() throws Exception {
        requiresMavenVersion("[3.0-beta-3,)");
        testit("test-dab");
    }

    @Test
    public void testitDBA() throws Exception {
        testit("test-dba");
    }

    /**
     * Verify that conflict resolution picks the nearest version that matches all hard constraints given by ranges.
     * And for conflicting dependencies on distinct tree levels, "nearest" shouldn't be subject to the dependency
     * order.
     */
    private void testit(String test) throws Exception {
        File testDir = ResourceExtractor.simpleExtractResources(getClass(), "/mng-4768");

        Verifier verifier = newVerifier(new File(testDir, test).getAbsolutePath());
        verifier.setAutoclean(false);
        verifier.deleteDirectory("target");
        verifier.deleteArtifacts("org.apache.maven.its.mng4768");
        verifier.addCliArgument("-s");
        verifier.addCliArgument("settings.xml");
        verifier.filterFile("../settings-template.xml", "settings.xml", "UTF-8");
        verifier.addCliArgument("validate");
        verifier.execute();
        verifier.verifyErrorFreeLog();

        List<String> classpath = verifier.loadLines("target/classpath.txt", "UTF-8");

        assertTrue(test + " > " + classpath.toString(), classpath.contains("a-2.0.jar"));
        assertTrue(test + " > " + classpath.toString(), classpath.contains("b-0.1.jar"));
        assertTrue(test + " > " + classpath.toString(), classpath.contains("c-0.1.jar"));
        assertTrue(test + " > " + classpath.toString(), classpath.contains("d-0.1.jar"));

        assertFalse(test + " > " + classpath.toString(), classpath.contains("a-2.1.jar"));
        assertFalse(test + " > " + classpath.toString(), classpath.contains("a-1.0.jar"));
    }
}