"""Tests for dense recursive polynomials' tools. """

from sympy.polys.densebasic import (
    dup_LC, dmp_LC, dup_normal, dmp_normal,
    dup_from_raw_dict, dmp_from_dict,
    dmp_convert, dmp_swap, dmp_one_p,
)

from sympy.polys.densearith import (
    dup_add, dup_mul, dup_exquo,
    dmp_neg, dmp_sub, dmp_mul_ground, dmp_mul, dmp_sqr,
)

from sympy.polys.densetools import (
    dup_clear_denoms, dmp_clear_denoms,
    dup_integrate, dmp_integrate, dmp_integrate_in,
    dup_diff, dmp_diff, dmp_diff_in,
    dup_eval, dmp_eval, dmp_eval_in,
    dmp_eval_tail, dmp_diff_eval_in,
    dup_trunc, dmp_trunc, dmp_ground_trunc,
    dup_monic, dmp_ground_monic,
    dup_content, dmp_ground_content,
    dup_primitive, dmp_ground_primitive,
    dup_extract, dmp_ground_extract,
    dup_real_imag,
    dup_mirror, dup_scale, dup_shift,
    dup_transform,
    dup_compose, dmp_compose,
    dup_decompose,
    dmp_lift,
    dup_sign_variations,
    dup_revert, dmp_revert,
)

from sympy.polys.polyclasses import DMP, ANP

from sympy.polys.polyerrors import (
    MultivariatePolynomialError,
    ExactQuotientFailed,
    NotReversible,
    DomainError,
)

from sympy.polys.specialpolys import (
    f_0, f_1, f_2, f_3, f_4, f_5, f_6,
    dmp_fateman_poly_F_1,
    dmp_fateman_poly_F_2,
    dmp_fateman_poly_F_3,
)

from sympy.polys.domains import FF, ZZ, QQ, EX

from sympy import I

from sympy.utilities.pytest import raises

def test_dup_integrate():
    assert dup_integrate([], 1, QQ) == []
    assert dup_integrate([], 2, QQ) == []

    assert dup_integrate([QQ(1)], 1, QQ) == [QQ(1),QQ(0)]
    assert dup_integrate([QQ(1)], 2, QQ) == [QQ(1,2),QQ(0),QQ(0)]

    assert dup_integrate([QQ(1),QQ(2),QQ(3)], 0, QQ) == \
        [QQ(1),QQ(2),QQ(3)]
    assert dup_integrate([QQ(1),QQ(2),QQ(3)], 1, QQ) == \
        [QQ(1,3),QQ(1),QQ(3),QQ(0)]
    assert dup_integrate([QQ(1),QQ(2),QQ(3)], 2, QQ) == \
        [QQ(1,12),QQ(1,3),QQ(3,2),QQ(0),QQ(0)]
    assert dup_integrate([QQ(1),QQ(2),QQ(3)], 3, QQ) == \
        [QQ(1,60),QQ(1,12),QQ(1,2),QQ(0),QQ(0),QQ(0)]

    assert dup_integrate(dup_from_raw_dict({29: QQ(17)}, QQ), 3, QQ) == \
        dup_from_raw_dict({32: QQ(17,29760)}, QQ)

    assert dup_integrate(dup_from_raw_dict({29: QQ(17), 5: QQ(1,2)}, QQ), 3, QQ) == \
        dup_from_raw_dict({32: QQ(17,29760), 8: QQ(1, 672)}, QQ)

def test_dmp_integrate():
    assert dmp_integrate([[[]]], 1, 2, QQ) == [[[]]]
    assert dmp_integrate([[[]]], 2, 2, QQ) == [[[]]]

    assert dmp_integrate([[[QQ(1)]]], 1, 2, QQ) == [[[QQ(1)]],[[]]]
    assert dmp_integrate([[[QQ(1)]]], 2, 2, QQ) == [[[QQ(1,2)]],[[]],[[]]]

    assert dmp_integrate([[QQ(1)],[QQ(2)],[QQ(3)]], 0, 1, QQ) == \
        [[QQ(1)],[QQ(2)],[QQ(3)]]
    assert dmp_integrate([[QQ(1)],[QQ(2)],[QQ(3)]], 1, 1, QQ) == \
        [[QQ(1,3)],[QQ(1)],[QQ(3)],[]]
    assert dmp_integrate([[QQ(1)],[QQ(2)],[QQ(3)]], 2, 1, QQ) == \
        [[QQ(1,12)],[QQ(1,3)],[QQ(3,2)],[],[]]
    assert dmp_integrate([[QQ(1)],[QQ(2)],[QQ(3)]], 3, 1, QQ) == \
        [[QQ(1,60)],[QQ(1,12)],[QQ(1,2)],[],[],[]]

def test_dmp_integrate_in():
    f = dmp_convert(f_6, 3, ZZ, QQ)

    assert dmp_integrate_in(f, 2, 1, 3, QQ) == \
        dmp_swap(dmp_integrate(dmp_swap(f, 0, 1, 3, QQ), 2, 3, QQ), 0, 1, 3, QQ)
    assert dmp_integrate_in(f, 3, 1, 3, QQ) == \
        dmp_swap(dmp_integrate(dmp_swap(f, 0, 1, 3, QQ), 3, 3, QQ), 0, 1, 3, QQ)
    assert dmp_integrate_in(f, 2, 2, 3, QQ) == \
        dmp_swap(dmp_integrate(dmp_swap(f, 0, 2, 3, QQ), 2, 3, QQ), 0, 2, 3, QQ)
    assert dmp_integrate_in(f, 3, 2, 3, QQ) == \
        dmp_swap(dmp_integrate(dmp_swap(f, 0, 2, 3, QQ), 3, 3, QQ), 0, 2, 3, QQ)

def test_dup_diff():
    assert dup_diff([], 1, ZZ) == []
    assert dup_diff([7], 1, ZZ) == []
    assert dup_diff([2,7], 1, ZZ) == [2]
    assert dup_diff([1,2,1], 1, ZZ) == [2,2]
    assert dup_diff([1,2,3,4], 1, ZZ) == [3,4,3]
    assert dup_diff([1,-1,0,0,2], 1, ZZ) == [4,-3,0,0]

    f = dup_normal([17,34,56,-345,23,76,0,0,12,3,7], ZZ)

    assert dup_diff(f, 0, ZZ) ==                            f
    assert dup_diff(f, 1, ZZ) ==                   dup_diff(f, 1, ZZ)
    assert dup_diff(f, 2, ZZ) ==          dup_diff(dup_diff(f, 1, ZZ), 1, ZZ)
    assert dup_diff(f, 3, ZZ) == dup_diff(dup_diff(dup_diff(f, 1, ZZ), 1, ZZ), 1, ZZ)

    K = FF(3)
    f = dup_normal([17,34,56,-345,23,76,0,0,12,3,7], K)

    assert dup_diff(f, 1, K) == dup_normal([2,0,1,0,0,2,0,0,0,0], K)
    assert dup_diff(f, 2, K) == dup_normal([1,0,0,2,0,0,0], K)
    assert dup_diff(f, 3, K) == dup_normal([], K)

    assert dup_diff(f, 0, K) ==                            f
    assert dup_diff(f, 1, K) ==                   dup_diff(f, 1, K)
    assert dup_diff(f, 2, K) ==          dup_diff(dup_diff(f, 1, K), 1, K)
    assert dup_diff(f, 3, K) == dup_diff(dup_diff(dup_diff(f, 1, K), 1, K), 1, K)

def test_dmp_diff():
    assert dmp_diff([], 1, 0, ZZ) == []
    assert dmp_diff([[]], 1, 1, ZZ) == [[]]
    assert dmp_diff([[[]]], 1, 2, ZZ) == [[[]]]

    assert dmp_diff([[[1], [2]]], 1, 2, ZZ) == [[[]]]

    assert dmp_diff([[[1]], [[]]], 1, 2, ZZ) == [[[1]]]
    assert dmp_diff([[[3]], [[1]], [[]]], 1, 2, ZZ) == [[[6]], [[1]]]

    assert dmp_diff([1,-1,0,0,2], 1, 0, ZZ) == \
           dup_diff([1,-1,0,0,2], 1, ZZ)

    assert dmp_diff(f_6, 0, 3, ZZ) ==                            f_6
    assert dmp_diff(f_6, 1, 3, ZZ) ==                   dmp_diff(f_6, 1, 3, ZZ)
    assert dmp_diff(f_6, 2, 3, ZZ) ==          dmp_diff(dmp_diff(f_6, 1, 3, ZZ), 1, 3, ZZ)
    assert dmp_diff(f_6, 3, 3, ZZ) == dmp_diff(dmp_diff(dmp_diff(f_6, 1, 3, ZZ), 1, 3, ZZ), 1, 3, ZZ)

    K = FF(23)
    F_6 = dmp_normal(f_6, 3, K)

    assert dmp_diff(F_6, 0, 3, K) ==                            F_6
    assert dmp_diff(F_6, 1, 3, K) ==                   dmp_diff(F_6, 1, 3, K)
    assert dmp_diff(F_6, 2, 3, K) ==          dmp_diff(dmp_diff(F_6, 1, 3, K), 1, 3, K)
    assert dmp_diff(F_6, 3, 3, K) == dmp_diff(dmp_diff(dmp_diff(F_6, 1, 3, K), 1, 3, K), 1, 3, K)

def test_dmp_diff_in():
    assert dmp_diff_in(f_6, 2, 1, 3, ZZ) == \
        dmp_swap(dmp_diff(dmp_swap(f_6, 0, 1, 3, ZZ), 2, 3, ZZ), 0, 1, 3, ZZ)
    assert dmp_diff_in(f_6, 3, 1, 3, ZZ) == \
        dmp_swap(dmp_diff(dmp_swap(f_6, 0, 1, 3, ZZ), 3, 3, ZZ), 0, 1, 3, ZZ)
    assert dmp_diff_in(f_6, 2, 2, 3, ZZ) == \
        dmp_swap(dmp_diff(dmp_swap(f_6, 0, 2, 3, ZZ), 2, 3, ZZ), 0, 2, 3, ZZ)
    assert dmp_diff_in(f_6, 3, 2, 3, ZZ) == \
        dmp_swap(dmp_diff(dmp_swap(f_6, 0, 2, 3, ZZ), 3, 3, ZZ), 0, 2, 3, ZZ)

def test_dup_eval():
    assert dup_eval([], 7, ZZ) == 0
    assert dup_eval([1,2], 0, ZZ) == 2
    assert dup_eval([1,2,3], 7, ZZ) == 66

def test_dmp_eval():
    assert dmp_eval([], 3, 0, ZZ) == 0

    assert dmp_eval([[]], 3, 1, ZZ) == []
    assert dmp_eval([[[]]], 3, 2, ZZ) == [[]]

    assert dmp_eval([[1,2]], 0, 1, ZZ) == [1,2]

    assert dmp_eval([[[1]]], 3, 2, ZZ) == [[1]]
    assert dmp_eval([[[1, 2]]], 3, 2, ZZ) == [[1, 2]]

    assert dmp_eval([[3, 2], [1, 2]], 3, 1, ZZ) == [10, 8]
    assert dmp_eval([[[3, 2]], [[1, 2]]], 3, 2, ZZ) == [[10, 8]]

def test_dmp_eval_in():
    assert dmp_eval_in(f_6,-2, 1, 3, ZZ) == dmp_eval(dmp_swap(f_6, 0, 1, 3, ZZ),-2, 3, ZZ)
    assert dmp_eval_in(f_6, 7, 1, 3, ZZ) == dmp_eval(dmp_swap(f_6, 0, 1, 3, ZZ), 7, 3, ZZ)
    assert dmp_eval_in(f_6,-2, 2, 3, ZZ) == dmp_swap(dmp_eval(dmp_swap(f_6, 0, 2, 3, ZZ),-2, 3, ZZ), 0, 1, 2, ZZ)
    assert dmp_eval_in(f_6, 7, 2, 3, ZZ) == dmp_swap(dmp_eval(dmp_swap(f_6, 0, 2, 3, ZZ), 7, 3, ZZ), 0, 1, 2, ZZ)

    f = [[[45L]], [[]], [[]], [[-9L], [-1L], [], [3L, 0L, 10L, 0L]]]

    assert dmp_eval_in(f, -2, 2, 2, ZZ) == \
        [[45], [], [], [-9, -1, 0, -44]]

def test_dmp_eval_tail():
    assert dmp_eval_tail([[]], [1], 1, ZZ) == []
    assert dmp_eval_tail([[[]]], [1], 2, ZZ) == [[]]
    assert dmp_eval_tail([[[]]], [1, 2], 2, ZZ) == []

    assert dmp_eval_tail(f_0, [], 2, ZZ) == f_0

    assert dmp_eval_tail(f_0, [1,-17,8], 2, ZZ) == 84496
    assert dmp_eval_tail(f_0, [-17, 8], 2, ZZ) == [-1409, 3, 85902]
    assert dmp_eval_tail(f_0, [8], 2, ZZ) == [[83, 2], [3], [302, 81, 1]]

    assert dmp_eval_tail(f_1, [-17, 8], 2, ZZ) == [-136, 15699, 9166, -27144]

    assert dmp_eval_tail(f_2, [-12, 3], 2, ZZ) == [-1377, 0, -702, -1224, 0, -624]
    assert dmp_eval_tail(f_3, [-12, 3], 2, ZZ) == [144, 82, -5181, -28872, -14868, -540]

    assert dmp_eval_tail(f_4, [25, -1], 2, ZZ) == [152587890625, 9765625, -59605407714843750,
        -3839159765625, -1562475, 9536712644531250, 610349546750, -4, 24414375000, 1562520]
    assert dmp_eval_tail(f_5, [25, -1], 2, ZZ) == [-1, -78, -2028, -17576]

    assert dmp_eval_tail(f_6, [0, 2, 4], 3, ZZ) == [5040, 0, 0, 4480]

def test_dmp_diff_eval_in():
    assert dmp_diff_eval_in(f_6, 2, 7, 1, 3, ZZ) == \
        dmp_eval(dmp_diff(dmp_swap(f_6, 0, 1, 3, ZZ), 2, 3, ZZ), 7, 3, ZZ)

def test_dup_revert():
    f = [-QQ(1,720),QQ(0),QQ(1,24),QQ(0),-QQ(1,2),QQ(0),QQ(1)]
    g = [QQ(61,720),QQ(0),QQ(5,24),QQ(0), QQ(1,2),QQ(0),QQ(1)]

    assert dup_revert(f, 8, QQ) == g

    raises(NotReversible, "dup_revert([QQ(1), QQ(0)], 3, QQ)")

def test_dmp_revert():
    f = [-QQ(1,720),QQ(0),QQ(1,24),QQ(0),-QQ(1,2),QQ(0),QQ(1)]
    g = [QQ(61,720),QQ(0),QQ(5,24),QQ(0), QQ(1,2),QQ(0),QQ(1)]

    assert dmp_revert(f, 8, 0, QQ) == g

    raises(MultivariatePolynomialError, "dmp_revert([[1]], 2, 1, QQ)")

def test_dup_trunc():
    assert dup_trunc([1,2,3,4,5,6], ZZ(3), ZZ) == [1, -1, 0, 1, -1, 0]
    assert dup_trunc([6,5,4,3,2,1], ZZ(3), ZZ) ==    [-1, 1, 0, -1, 1]

def test_dmp_trunc():
    assert dmp_trunc([[]], [1,2], 2, ZZ) == [[]]
    assert dmp_trunc([[1,2], [1,4,1], [1]], [1,2], 1, ZZ) == [[-3], [1]]

def test_dmp_ground_trunc():
    assert dmp_ground_trunc(f_0, ZZ(3), 2, ZZ) == \
        dmp_normal([[[1, -1, 0], [-1]], [[]], [[1, -1, 0], [1, -1, 1], [1]]], 2, ZZ)

def test_dup_monic():
    assert dup_monic([3,6,9], ZZ) == [1,2,3]

    raises(ExactQuotientFailed, 'dup_monic([3,4,5], ZZ)')

    assert dup_monic([], QQ) == []
    assert dup_monic([QQ(1)], QQ) == [QQ(1)]
    assert dup_monic([QQ(7),QQ(1),QQ(21)], QQ) == [QQ(1),QQ(1,7),QQ(3)]

def test_dmp_ground_monic():
    assert dmp_ground_monic([[3],[6],[9]], 1, ZZ) == [[1],[2],[3]]

    raises(ExactQuotientFailed, 'dmp_ground_monic([[3],[4],[5]], 1, ZZ)')

    assert dmp_ground_monic([[]], 1, QQ) == [[]]
    assert dmp_ground_monic([[QQ(1)]], 1, QQ) == [[QQ(1)]]
    assert dmp_ground_monic([[QQ(7)],[QQ(1)],[QQ(21)]], 1, QQ) == [[QQ(1)],[QQ(1,7)],[QQ(3)]]

def test_dup_content():
    assert dup_content([], ZZ) == ZZ(0)
    assert dup_content([1], ZZ) == ZZ(1)
    assert dup_content([-1], ZZ) == ZZ(1)
    assert dup_content([1,1], ZZ) == ZZ(1)
    assert dup_content([2,2], ZZ) == ZZ(2)
    assert dup_content([1,2,1], ZZ) == ZZ(1)
    assert dup_content([2,4,2], ZZ) == ZZ(2)

    assert dup_content([QQ(2,3),QQ(4,5)], QQ) == QQ(1)

def test_dmp_ground_content():
    assert dmp_ground_content([[]], 1, ZZ) == ZZ(0)
    assert dmp_ground_content([[]], 1, QQ) == QQ(0)
    assert dmp_ground_content([[1]], 1, ZZ) == ZZ(1)
    assert dmp_ground_content([[-1]], 1, ZZ) == ZZ(1)
    assert dmp_ground_content([[1],[1]], 1, ZZ) == ZZ(1)
    assert dmp_ground_content([[2],[2]], 1, ZZ) == ZZ(2)
    assert dmp_ground_content([[1],[2],[1]], 1, ZZ) == ZZ(1)
    assert dmp_ground_content([[2],[4],[2]], 1, ZZ) == ZZ(2)

    assert dmp_ground_content([[QQ(2,3)],[QQ(4,5)]], 1, QQ) == QQ(1)

    assert dmp_ground_content(f_0, 2, ZZ) == ZZ(1)
    assert dmp_ground_content(dmp_mul_ground(f_0, ZZ(2), 2, ZZ), 2, ZZ) == ZZ(2)

    assert dmp_ground_content(f_1, 2, ZZ) == ZZ(1)
    assert dmp_ground_content(dmp_mul_ground(f_1, ZZ(3), 2, ZZ), 2, ZZ) == ZZ(3)

    assert dmp_ground_content(f_2, 2, ZZ) == ZZ(1)
    assert dmp_ground_content(dmp_mul_ground(f_2, ZZ(4), 2, ZZ), 2, ZZ) == ZZ(4)

    assert dmp_ground_content(f_3, 2, ZZ) == ZZ(1)
    assert dmp_ground_content(dmp_mul_ground(f_3, ZZ(5), 2, ZZ), 2, ZZ) == ZZ(5)

    assert dmp_ground_content(f_4, 2, ZZ) == ZZ(1)
    assert dmp_ground_content(dmp_mul_ground(f_4, ZZ(6), 2, ZZ), 2, ZZ) == ZZ(6)

    assert dmp_ground_content(f_5, 2, ZZ) == ZZ(1)
    assert dmp_ground_content(dmp_mul_ground(f_5, ZZ(7), 2, ZZ), 2, ZZ) == ZZ(7)

    assert dmp_ground_content(f_6, 3, ZZ) == ZZ(1)
    assert dmp_ground_content(dmp_mul_ground(f_6, ZZ(8), 3, ZZ), 3, ZZ) == ZZ(8)

def test_dup_primitive():
    assert dup_primitive([], ZZ) == (ZZ(0), [])
    assert dup_primitive([ZZ(1)], ZZ) == (ZZ(1), [ZZ(1)])
    assert dup_primitive([ZZ(1),ZZ(1)], ZZ) == (ZZ(1), [ZZ(1),ZZ(1)])
    assert dup_primitive([ZZ(2),ZZ(2)], ZZ) == (ZZ(2), [ZZ(1),ZZ(1)])
    assert dup_primitive([ZZ(1),ZZ(2),ZZ(1)], ZZ) == (ZZ(1), [ZZ(1),ZZ(2),ZZ(1)])
    assert dup_primitive([ZZ(2),ZZ(4),ZZ(2)], ZZ) == (ZZ(2), [ZZ(1),ZZ(2),ZZ(1)])

    assert dup_primitive([], QQ) == (QQ(0), [])
    assert dup_primitive([QQ(1)], QQ) == (QQ(1), [QQ(1)])
    assert dup_primitive([QQ(1),QQ(1)], QQ) == (QQ(1), [QQ(1),QQ(1)])
    assert dup_primitive([QQ(2),QQ(2)], QQ) == (QQ(1), [QQ(2),QQ(2)])
    assert dup_primitive([QQ(1),QQ(2),QQ(1)], QQ) == (QQ(1), [QQ(1),QQ(2),QQ(1)])
    assert dup_primitive([QQ(2),QQ(4),QQ(2)], QQ) == (QQ(1), [QQ(2),QQ(4),QQ(2)])

    assert dup_primitive([QQ(2,3),QQ(4,5)], QQ) == (QQ(1), [QQ(2,3),QQ(4,5)])

def test_dmp_ground_primitive():
    assert dmp_ground_primitive([[]], 1, ZZ) == (ZZ(0), [[]])

    assert dmp_ground_primitive(f_0, 2, ZZ) == (ZZ(1), f_0)
    assert dmp_ground_primitive(dmp_mul_ground(f_0, ZZ(2), 2, ZZ), 2, ZZ) == (ZZ(2), f_0)

    assert dmp_ground_primitive(f_1, 2, ZZ) == (ZZ(1), f_1)
    assert dmp_ground_primitive(dmp_mul_ground(f_1, ZZ(3), 2, ZZ), 2, ZZ) == (ZZ(3), f_1)

    assert dmp_ground_primitive(f_2, 2, ZZ) == (ZZ(1), f_2)
    assert dmp_ground_primitive(dmp_mul_ground(f_2, ZZ(4), 2, ZZ), 2, ZZ) == (ZZ(4), f_2)

    assert dmp_ground_primitive(f_3, 2, ZZ) == (ZZ(1), f_3)
    assert dmp_ground_primitive(dmp_mul_ground(f_3, ZZ(5), 2, ZZ), 2, ZZ) == (ZZ(5), f_3)

    assert dmp_ground_primitive(f_4, 2, ZZ) == (ZZ(1), f_4)
    assert dmp_ground_primitive(dmp_mul_ground(f_4, ZZ(6), 2, ZZ), 2, ZZ) == (ZZ(6), f_4)

    assert dmp_ground_primitive(f_5, 2, ZZ) == (ZZ(1), f_5)
    assert dmp_ground_primitive(dmp_mul_ground(f_5, ZZ(7), 2, ZZ), 2, ZZ) == (ZZ(7), f_5)

    assert dmp_ground_primitive(f_6, 3, ZZ) == (ZZ(1), f_6)
    assert dmp_ground_primitive(dmp_mul_ground(f_6, ZZ(8), 3, ZZ), 3, ZZ) == (ZZ(8), f_6)

    assert dmp_ground_primitive([[ZZ(2)]], 1, ZZ) == (ZZ(2), [[ZZ(1)]])
    assert dmp_ground_primitive([[QQ(2)]], 1, QQ) == (QQ(1), [[QQ(2)]])

def test_dup_extract():
    f = dup_normal([2930944, 0, 2198208, 0, 549552, 0, 45796], ZZ)
    g = dup_normal([17585664, 0, 8792832, 0, 1099104, 0], ZZ)

    F = dup_normal([64, 0, 48, 0, 12, 0, 1], ZZ)
    G = dup_normal([384, 0, 192, 0, 24, 0], ZZ)

    assert dup_extract(f, g, ZZ) == (45796, F, G)

def test_dmp_ground_extract():
    f = dmp_normal([[2930944], [], [2198208], [], [549552], [], [45796]], 1, ZZ)
    g = dmp_normal([[17585664], [], [8792832], [], [1099104], []], 1, ZZ)

    F = dmp_normal([[64], [], [48], [], [12], [], [1]], 1, ZZ)
    G = dmp_normal([[384], [], [192], [], [24], []], 1, ZZ)

    assert dmp_ground_extract(f, g, 1, ZZ) == (45796, F, G)

def test_dup_real_imag():
    assert dup_real_imag([], ZZ) == ([[]], [[]])
    assert dup_real_imag([1], ZZ) == ([[1]], [[]])

    assert dup_real_imag([1,1], ZZ) == ([[1], [1]], [[1,0]])
    assert dup_real_imag([1,2], ZZ) == ([[1], [2]], [[1,0]])

    assert dup_real_imag([1,2,3], ZZ) == ([[1], [2], [-1,0,3]], [[2,0], [2,0]])

    raises(DomainError, "dup_real_imag([EX(1), EX(2)], EX)")

def test_dup_mirror():
    assert dup_mirror([], ZZ) == []
    assert dup_mirror([1], ZZ) == [1]

    assert dup_mirror([1,2,3,4,5], ZZ) == [1,-2,3,-4,5]
    assert dup_mirror([1,2,3,4,5,6], ZZ) == [-1,2,-3,4,-5,6]

def test_dup_scale():
    assert dup_scale([], -1, ZZ) == []
    assert dup_scale([1], -1, ZZ) == [1]

    assert dup_scale([1,2,3,4,5], -1, ZZ) == [1,-2,3,-4,5]
    assert dup_scale([1,2,3,4,5], -7, ZZ) == [2401,-686,147,-28,5]

def test_dup_shift():
    assert dup_shift([], 1, ZZ) == []
    assert dup_shift([1], 1, ZZ) == [1]

    assert dup_shift([1,2,3,4,5], 1, ZZ) == [1,6,15,20,15]
    assert dup_shift([1,2,3,4,5], 7, ZZ) == [1,30,339,1712,3267]

def test_dup_transform():
    assert dup_transform([], [], [1,1], ZZ) == []
    assert dup_transform([], [1], [1,1], ZZ) == []
    assert dup_transform([], [1,2], [1,1], ZZ) == []

    assert dup_transform([6,-5,4,-3,17], [1,-3,4], [2,-3], ZZ) == \
        [6,-82,541,-2205,6277,-12723,17191,-13603,4773]

def test_dup_compose():
    assert dup_compose([], [], ZZ) == []
    assert dup_compose([], [1], ZZ) == []
    assert dup_compose([], [1,2], ZZ) == []

    assert dup_compose([1], [], ZZ) == [1]

    assert dup_compose([1,2,0], [], ZZ) == []
    assert dup_compose([1,2,1], [], ZZ) == [1]

    assert dup_compose([1,2,1], [1], ZZ) == [4]
    assert dup_compose([1,2,1], [7], ZZ) == [64]

    assert dup_compose([1,2,1], [1,-1], ZZ) == [1,0,0]
    assert dup_compose([1,2,1], [1, 1], ZZ) == [1,4,4]
    assert dup_compose([1,2,1], [1, 2, 1], ZZ) == [1,4,8,8,4]

def test_dmp_compose():
    assert dmp_compose([1,2,1], [1,2,1], 0, ZZ) == [1,4,8,8,4]

    assert dmp_compose([[[]]], [[[]]], 2, ZZ) == [[[]]]
    assert dmp_compose([[[]]], [[[1]]], 2, ZZ) == [[[]]]
    assert dmp_compose([[[]]], [[[1]],[[2]]], 2, ZZ) == [[[]]]

    assert dmp_compose([[[1]]], [], 2, ZZ) == [[[1]]]

    assert dmp_compose([[1],[2],[ ]], [[]], 1, ZZ) == [[]]
    assert dmp_compose([[1],[2],[1]], [[]], 1, ZZ) == [[1]]

    assert dmp_compose([[1],[2],[1]], [[1]], 1, ZZ) == [[4]]
    assert dmp_compose([[1],[2],[1]], [[7]], 1, ZZ) == [[64]]

    assert dmp_compose([[1],[2],[1]], [[1],[-1]], 1, ZZ) == [[1],[ ],[ ]]
    assert dmp_compose([[1],[2],[1]], [[1],[ 1]], 1, ZZ) == [[1],[4],[4]]

    assert dmp_compose([[1],[2],[1]], [[1], [2], [1]], 1, ZZ) == [[1],[4],[8],[8],[4]]

def test_dup_decompose():
    assert dup_decompose([1], ZZ) == [[1]]

    assert dup_decompose([1,0], ZZ) == [[1,0]]
    assert dup_decompose([1,0,0,0], ZZ) == [[1,0,0,0]]

    assert dup_decompose([1,0,0,0,0], ZZ) == [[1,0,0], [1,0,0]]
    assert dup_decompose([1,0,0,0,0,0,0], ZZ) == [[1,0,0,0], [1,0,0]]

    assert dup_decompose([7,0,0,0,1], ZZ) == [[7,0,1], [1,0,0]]
    assert dup_decompose([4,0,3,0,2], ZZ) == [[4,3,2], [1,0,0]]

    f = [1,0,20,0,150,0,500,0,625,-2,0,-10,9]

    assert dup_decompose(f, ZZ) == [[1,0,0,-2,9], [1,0,5,0]]

    f = [2,0,40,0,300,0,1000,0,1250,-4,0,-20,18]

    assert dup_decompose(f, ZZ) == [[2,0,0,-4,18], [1,0,5,0]]

    f = [1,0,20,-8,150,-120,524,-600,865,-1034,600,-170,29]

    assert dup_decompose(f, ZZ) == [[1,-8,24,-34,29], [1,0,5,0]]

    f = [DMP([6,0,-42], ZZ), DMP([48,0,96], ZZ), DMP([144,648,288], ZZ),
         DMP([624,864,384], ZZ), DMP([108,312,432,192], ZZ)]

    assert dup_decompose(f, ZZ['a']) == [f]

def test_dmp_lift():
    q = [QQ(1,1),QQ(0,1),QQ(1,1)]

    f = [ANP([QQ(1,1)], q, QQ), ANP([], q, QQ), ANP([], q, QQ),
         ANP([QQ(1,1),QQ(0,1)], q, QQ), ANP([QQ(17,1),QQ(0,1)], q, QQ)]

    assert dmp_lift(f, 0, QQ.algebraic_field(I)) == \
        [QQ(1),QQ(0),QQ(0),QQ(0),QQ(0),QQ(0),QQ(2),QQ(0),QQ(578),
         QQ(0),QQ(0),QQ(0),QQ(1),QQ(0),QQ(-578),QQ(0),QQ(83521)]

    raises(DomainError, "dmp_lift([EX(1), EX(2)], 0, EX)")

def test_dup_sign_variations():
    assert dup_sign_variations([], ZZ) == 0
    assert dup_sign_variations([1,0], ZZ) == 0
    assert dup_sign_variations([1,0,2], ZZ) == 0
    assert dup_sign_variations([1,0,3,0], ZZ) == 0
    assert dup_sign_variations([1,0,4,0,5], ZZ) == 0

    assert dup_sign_variations([-1,0,2], ZZ) == 1
    assert dup_sign_variations([-1,0,3,0], ZZ) == 1
    assert dup_sign_variations([-1,0,4,0,5], ZZ) == 1

    assert dup_sign_variations([-1,-4,-5], ZZ) == 0
    assert dup_sign_variations([ 1,-4,-5], ZZ) == 1
    assert dup_sign_variations([ 1, 4,-5], ZZ) == 1
    assert dup_sign_variations([ 1,-4, 5], ZZ) == 2
    assert dup_sign_variations([-1, 4,-5], ZZ) == 2
    assert dup_sign_variations([-1, 4, 5], ZZ) == 1
    assert dup_sign_variations([-1,-4, 5], ZZ) == 1
    assert dup_sign_variations([ 1, 4, 5], ZZ) == 0

    assert dup_sign_variations([-1,0,-4,0,-5], ZZ) == 0
    assert dup_sign_variations([ 1,0,-4,0,-5], ZZ) == 1
    assert dup_sign_variations([ 1,0, 4,0,-5], ZZ) == 1
    assert dup_sign_variations([ 1,0,-4,0, 5], ZZ) == 2
    assert dup_sign_variations([-1,0, 4,0,-5], ZZ) == 2
    assert dup_sign_variations([-1,0, 4,0, 5], ZZ) == 1
    assert dup_sign_variations([-1,0,-4,0, 5], ZZ) == 1
    assert dup_sign_variations([ 1,0, 4,0, 5], ZZ) == 0

def test_dup_clear_denoms():
    assert dup_clear_denoms([], QQ, ZZ) == (ZZ(1), [])

    assert dup_clear_denoms([QQ(1)], QQ, ZZ) == (ZZ(1), [QQ(1)])
    assert dup_clear_denoms([QQ(7)], QQ, ZZ) == (ZZ(1), [QQ(7)])

    assert dup_clear_denoms([QQ(7,3)], QQ) == (ZZ(3), [QQ(7)])
    assert dup_clear_denoms([QQ(7,3)], QQ, ZZ) == (ZZ(3), [QQ(7)])

    assert dup_clear_denoms([QQ(3),QQ(1),QQ(0)], QQ, ZZ) == (ZZ(1), [QQ(3),QQ(1),QQ(0)])
    assert dup_clear_denoms([QQ(1),QQ(1,2),QQ(0)], QQ, ZZ) == (ZZ(2), [QQ(2),QQ(1),QQ(0)])

    assert dup_clear_denoms([QQ(3),QQ(1),QQ(0)], QQ, ZZ, convert=True) == (ZZ(1), [ZZ(3),ZZ(1),ZZ(0)])
    assert dup_clear_denoms([QQ(1),QQ(1,2),QQ(0)], QQ, ZZ, convert=True) == (ZZ(2), [ZZ(2),ZZ(1),ZZ(0)])

    raises(DomainError, "dup_clear_denoms([EX(7)], EX)")

def test_dmp_clear_denoms():
    assert dmp_clear_denoms([[]], 1, QQ, ZZ) == (ZZ(1), [[]])

    assert dmp_clear_denoms([[QQ(1)]], 1, QQ, ZZ) == (ZZ(1), [[QQ(1)]])
    assert dmp_clear_denoms([[QQ(7)]], 1, QQ, ZZ) == (ZZ(1), [[QQ(7)]])

    assert dmp_clear_denoms([[QQ(7,3)]], 1, QQ) == (ZZ(3), [[QQ(7)]])
    assert dmp_clear_denoms([[QQ(7,3)]], 1, QQ, ZZ) == (ZZ(3), [[QQ(7)]])

    assert dmp_clear_denoms([[QQ(3)],[QQ(1)],[]], 1, QQ, ZZ) == (ZZ(1), [[QQ(3)],[QQ(1)],[]])
    assert dmp_clear_denoms([[QQ(1)],[QQ(1,2)],[]], 1, QQ, ZZ) == (ZZ(2), [[QQ(2)],[QQ(1)],[]])

    assert dmp_clear_denoms([QQ(3),QQ(1),QQ(0)], 0, QQ, ZZ, convert=True) == (ZZ(1), [ZZ(3),ZZ(1),ZZ(0)])
    assert dmp_clear_denoms([QQ(1),QQ(1,2),QQ(0)], 0, QQ, ZZ, convert=True) == (ZZ(2), [ZZ(2),ZZ(1),ZZ(0)])

    assert dmp_clear_denoms([[QQ(3)],[QQ(1)],[]], 1, QQ, ZZ, convert=True) == (ZZ(1), [[QQ(3)],[QQ(1)],[]])
    assert dmp_clear_denoms([[QQ(1)],[QQ(1,2)],[]], 1, QQ, ZZ, convert=True) == (ZZ(2), [[QQ(2)],[QQ(1)],[]])

    raises(DomainError, "dmp_clear_denoms([[EX(7)]], 1, EX)")
