moduleIdSet(["foo", "bar"], ["foo", "baz"])
        ]
    }

    def "intersection of #one with #other = #expected"() {
        expect:
        ops.tryIntersect(one, other) == expected
        ops.tryIntersect(other, one) == expected

        where:

        intersections.add(new IntersectModuleSetWithModuleSet());
        intersections.add(new IntersectModuleSetWithGroupSet());
    }

    @Nullable
    ExcludeSpec tryIntersect(ExcludeSpec left, ExcludeSpec right) {
        if (left.equals(right)) {
            return left;
        } else {
            return intersections.stream()
                .filter(i -> i.applies(left, right))

                        ExcludeSpec right = asArray[j];
                        if (right != null && i != j) {
                            ExcludeSpec merged = intersections.tryIntersect(left, right);
                            if (merged != null) {
                                if (merged instanceof ExcludeNothing) {
                                    return merged;
                                }