MathPHP\SetTheory\SetOperationsTest::dataProviderForUnion PHP Метод

    public function dataProviderForUnion()
    {
        return [[[], [], [], new Set()], [[1], [], [1], new Set([1])], [[], [1], [1], new Set([1])], [[1], [1], [1], new Set([1])], [[1], [2], [1, 2], new Set([1, 2])], [[2], [1], [1, 2], new Set([1, 2])], [[1], [2], [2, 1], new Set([1, 2])], [[2], [1], [2, 1], new Set([1, 2])], [[1, 2, 3, 'a', 'b'], [1, 'a', 'k'], [1, 2, 3, 'a', 'b', 'k'], new Set([1, 2, 3, 'a', 'b', 'k'])], [[1, 2, 3, 'a', 'b', new Set([1, 2])], [1, 'a', 'k'], [1, 2, 3, 'a', 'b', 'k', new Set([1, 2])], new Set([1, 2, 3, 'a', 'b', 'k', new Set([1, 2])])], [[1, 2, 3, 'a', 'b'], [1, 'a', 'k', new Set([1, 2])], [1, 2, 3, 'a', 'b', 'k', new Set([1, 2])], new Set([1, 2, 3, 'a', 'b', 'k', new Set([1, 2])])], [[1, 2, 3, 'a', 'b', new Set()], [1, 'a', 'k', new Set([1, 2])], [1, 2, 3, 'a', 'b', 'k', new Set([1, 2]), new Set()], new Set([1, 2, 3, 'a', 'b', 'k', new Set([1, 2]), new Set()])], [[1, 2, 3, 'a', 'b', new Set([1, 2])], [1, 'a', 'k', -2, '2.4', 3.5, new Set([1, 2])], [1, 2, 3, 'a', 'b', 'k', -2, '2.4', 3.5, new Set([1, 2])], new Set([1, 2, 3, 'a', 'b', 'k', -2, '2.4', 3.5, new Set([1, 2])])]];
    }