}

    @Test
    void testThreadSafeMojos() throws Exception {
        MavenExecutionPlan plan = LifecycleExecutionPlanCalculatorStub.getProjectAExecutionPlan();
        final Set<Plugin> unSafePlugins = plan.getNonThreadSafePlugins();
        // There is only a single threadsafe plugin here...
        assertEquals(plan.size() - 1, unSafePlugins.size());
    }

    @Test
    void testFindLastWhenFirst() throws Exception {

    /**
     * Get set of plugins having a goal/mojo used but not marked @threadSafe
     *
     * @return the set of plugins (without info on which goal is concerned)
     */
    public Set<Plugin> getNonThreadSafePlugins() {
        Set<Plugin> plugins = new HashSet<>();
        for (ExecutionPlanItem executionPlanItem : planItem) {
            final MojoExecution mojoExecution = executionPlanItem.getMojoExecution();

        if (session.getRequest().getDegreeOfConcurrency() > 1
                && session.getProjects().size() > 1) {
            final Set<Plugin> unsafePlugins = executionPlan.getNonThreadSafePlugins();
            if (!unsafePlugins.isEmpty()) {
                for (String s : MultilineMessageHelper.format(
                        "Your build is requesting parallel execution, but this project contains the following "