}

    @Test
    void resumeFromGetsDetermined() {
        MavenProject projectA = createSucceededMavenProject("A");
        MavenProject projectB = createFailedMavenProject("B");
        executionResult.setTopologicallySortedProjects(asList(projectA, projectB));

        Optional<BuildResumptionData> result = analyzer.determineBuildResumptionData(executionResult);

        assertThat(result.isPresent(), is(true));

        this.project = project;

        return this;
    }

    public MavenProject getProject() {
        return project;
    }

    public MavenExecutionResult setTopologicallySortedProjects(List<MavenProject> topologicallySortedProjects) {
        this.topologicallySortedProjects = topologicallySortedProjects;

        return this;
    }

    }

    @Test
    void testResultWithNullTopologicallySortedProjectsIsEmptyList() {
        MavenExecutionResult result = new DefaultMavenExecutionResult();
        result.setTopologicallySortedProjects(null);
        List<MavenProject> projects = result.getTopologicallySortedProjects();
        assertNotNull(projects);
        assertThat(projects, is(empty()));
    }

/**
 */
public interface MavenExecutionResult {
    MavenExecutionResult setProject(MavenProject project);

    MavenProject getProject();

    MavenExecutionResult setTopologicallySortedProjects(List<MavenProject> projects);

    /**
     * @return the sorted list, or an empty list if there are no projects.
     */
    List<MavenProject> getTopologicallySortedProjects();

        }

        try {
            if (result.hasExceptions()) {
                return result;
            }

            result.setTopologicallySortedProjects(session.getProjects());

            result.setProject(session.getTopLevelProject());

            validatePrerequisitesForNonMavenPluginProjects(session.getProjects());