import org.apache.maven.project.MavenProject;
import org.codehaus.plexus.component.repository.exception.ComponentLookupException;

/**
 */
public class LifecycleExecutionPlanCalculatorStub implements LifecycleExecutionPlanCalculator {
    // clean

    public static final MojoDescriptor PRE_CLEAN = createMojoDescriptor("pre-clean");

import static org.apache.maven.lifecycle.internal.stub.LifecycleExecutionPlanCalculatorStub.CLEAN;
import static org.apache.maven.lifecycle.internal.stub.LifecycleExecutionPlanCalculatorStub.COMPILE;
import static org.apache.maven.lifecycle.internal.stub.LifecycleExecutionPlanCalculatorStub.INITIALIZE;
import static org.apache.maven.lifecycle.internal.stub.LifecycleExecutionPlanCalculatorStub.INSTALL;

        MavenExecutionPlan plan = LifecycleExecutionPlanCalculatorStub.getProjectAExecutionPlan();

        ExecutionPlanItem expected = plan.findLastInPhase("package");
        assertNotNull(expected);
    }

    @Test
    void testThreadSafeMojos() throws Exception {
        MavenExecutionPlan plan = LifecycleExecutionPlanCalculatorStub.getProjectAExecutionPlan();

 * under the License.
 */
package org.apache.maven.lifecycle.internal;

import java.util.List;

import org.apache.maven.lifecycle.MavenExecutionPlan;
import org.apache.maven.lifecycle.internal.stub.LifecycleExecutionPlanCalculatorStub;
import org.apache.maven.lifecycle.internal.stub.ProjectDependencyGraphStub;
import org.apache.maven.plugin.MojoExecution;
import org.junit.jupiter.api.Test;

import org.apache.maven.lifecycle.internal.LifecycleDebugLogger;
import org.apache.maven.lifecycle.internal.TaskSegment;
import org.apache.maven.lifecycle.internal.stub.LifecycleExecutionPlanCalculatorStub;
import org.apache.maven.lifecycle.internal.stub.ProjectDependencyGraphStub;
import org.junit.jupiter.api.Test;
import org.slf4j.Logger;

import static org.junit.jupiter.api.Assertions.assertEquals;

have not been properly populated, you'll get a nullpointer in your test and you then have to
identify which stub creates that specific piece of data.

The most important stubs are:
LifecycleExecutionPlanCalculatorStub
ProjectDependencyGraphStub

Since they define the primary structure of the project/build.

The stubs define three top-level targets that are defined in  LifecycleTaskSegmentCalculatorStub;