DefaultSessionTest.java

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 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
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 *
 *   http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.maven.internal.impl;

import java.nio.file.Paths;
import java.util.Collections;

import org.apache.maven.execution.DefaultMavenExecutionRequest;
import org.apache.maven.execution.MavenSession;
import org.apache.maven.model.root.RootLocator;
import org.eclipse.aether.DefaultRepositorySystemSession;
import org.eclipse.aether.RepositorySystem;
import org.eclipse.aether.RepositorySystemSession;
import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.mockito.Mockito.mock;

public class DefaultSessionTest {

    @Test
    void testRootDirectoryWithNull() {
        RepositorySystemSession rss = new DefaultRepositorySystemSession(h -> false);
        DefaultMavenExecutionRequest mer = new DefaultMavenExecutionRequest();
        MavenSession ms = new MavenSession(null, rss, mer, null);
        DefaultSession session =
                new DefaultSession(ms, mock(RepositorySystem.class), Collections.emptyList(), null, null, null);

        assertEquals(
                RootLocator.UNABLE_TO_FIND_ROOT_PROJECT_MESSAGE,
                assertThrows(IllegalStateException.class, session::getRootDirectory)
                        .getMessage());
    }

    @Test
    void testRootDirectory() {
        RepositorySystemSession rss = new DefaultRepositorySystemSession(h -> false);
        DefaultMavenExecutionRequest mer = new DefaultMavenExecutionRequest();
        MavenSession ms = new MavenSession(null, rss, mer, null);
        ms.getRequest().setRootDirectory(Paths.get("myRootDirectory"));
        DefaultSession session =
                new DefaultSession(ms, mock(RepositorySystem.class), Collections.emptyList(), null, null, null);

        assertEquals(Paths.get("myRootDirectory"), session.getRootDirectory());
    }
}