}

        @Override
        public void buildFinished(@Nullable Throwable buildFailure) {
            if (listener != null) {
                listener.execute(new BuildResult() {
                    @Nullable
                    @Override
                    public Throwable getFailure() {
                        return buildFailure;
                    }
                });
            }
        }
    }

        }

        List<String> remainingProjects = sortedProjects.stream()
                .filter(project -> result.getBuildSummary(project) == null
                        || result.getBuildSummary(project) instanceof BuildFailure)
                .map(project -> project.getGroupId() + ":" + project.getArtifactId())
                .collect(Collectors.toList());

        if (remainingProjects.isEmpty()) {

import javax.inject.Named;
import javax.inject.Singleton;

import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;

import org.apache.maven.artifact.Artifact;
import org.apache.maven.execution.BuildFailure;
import org.apache.maven.execution.ExecutionEvent;
import org.apache.maven.execution.MavenExecutionRequest;
import org.apache.maven.execution.MavenSession;
import org.apache.maven.internal.MultilineMessageHelper;

        when:
        def buildDesc = buildDescriptor(666, 'some build')
        def startEvent = buildStartEvent(999, 'start build', buildDesc)

        def buildResult = buildFailure(1, 2, Stub(InternalFailure))
        def failedEvent = buildFinishEvent(999, 'build failed', buildDesc, buildResult)

        adapter.onEvent(startEvent) // failedEvent always assumes a previous startEvent

        return project;
    }

    private MavenProject createFailedMavenProject(String artifactId) {
        MavenProject project = createMavenProject(artifactId);
        executionResult.addBuildSummary(new BuildFailure(project, 0, new Exception()));
        executionResult.addException(new LifecycleExecutionException("", project));
        return project;
    }

import org.apache.maven.api.services.MessageBuilder;
import org.apache.maven.api.services.MessageBuilderFactory;
import org.apache.maven.execution.AbstractExecutionListener;
import org.apache.maven.execution.BuildFailure;
import org.apache.maven.execution.BuildSuccess;
import org.apache.maven.execution.BuildSummary;
import org.apache.maven.execution.ExecutionEvent;
import org.apache.maven.execution.MavenExecutionResult;

    }

    public static class FailureCollector {
        private int buildFailures = 0;
        private int regressedScenarios = 0;
        private int flakyScenarioBigRegressions = 0;
        private int flakyScenarioSmallRegressions = 0;
        private boolean failBuild;

        public void scenarioFailed() {
            buildFailures++;
            failBuild = true;
        }