github.com/kaydxh/golang@v0.0.131/pkg/gocv/cgo/third_path/pybind11/tests/test_multiple_inheritance.py (about)

     1  import pytest
     2  
     3  import env  # noqa: F401
     4  from pybind11_tests import ConstructorStats
     5  from pybind11_tests import multiple_inheritance as m
     6  
     7  
     8  def test_multiple_inheritance_cpp():
     9      mt = m.MIType(3, 4)
    10  
    11      assert mt.foo() == 3
    12      assert mt.bar() == 4
    13  
    14  
    15  @pytest.mark.xfail("env.PYPY")
    16  def test_multiple_inheritance_mix1():
    17      class Base1:
    18          def __init__(self, i):
    19              self.i = i
    20  
    21          def foo(self):
    22              return self.i
    23  
    24      class MITypePy(Base1, m.Base2):
    25          def __init__(self, i, j):
    26              Base1.__init__(self, i)
    27              m.Base2.__init__(self, j)
    28  
    29      mt = MITypePy(3, 4)
    30  
    31      assert mt.foo() == 3
    32      assert mt.bar() == 4
    33  
    34  
    35  def test_multiple_inheritance_mix2():
    36      class Base2:
    37          def __init__(self, i):
    38              self.i = i
    39  
    40          def bar(self):
    41              return self.i
    42  
    43      class MITypePy(m.Base1, Base2):
    44          def __init__(self, i, j):
    45              m.Base1.__init__(self, i)
    46              Base2.__init__(self, j)
    47  
    48      mt = MITypePy(3, 4)
    49  
    50      assert mt.foo() == 3
    51      assert mt.bar() == 4
    52  
    53  
    54  @pytest.mark.xfail("env.PYPY")
    55  def test_multiple_inheritance_python():
    56      class MI1(m.Base1, m.Base2):
    57          def __init__(self, i, j):
    58              m.Base1.__init__(self, i)
    59              m.Base2.__init__(self, j)
    60  
    61      class B1:
    62          def v(self):
    63              return 1
    64  
    65      class MI2(B1, m.Base1, m.Base2):
    66          def __init__(self, i, j):
    67              B1.__init__(self)
    68              m.Base1.__init__(self, i)
    69              m.Base2.__init__(self, j)
    70  
    71      class MI3(MI2):
    72          def __init__(self, i, j):
    73              MI2.__init__(self, i, j)
    74  
    75      class MI4(MI3, m.Base2):
    76          def __init__(self, i, j):
    77              MI3.__init__(self, i, j)
    78              # This should be ignored (Base2 is already initialized via MI2):
    79              m.Base2.__init__(self, i + 100)
    80  
    81      class MI5(m.Base2, B1, m.Base1):
    82          def __init__(self, i, j):
    83              B1.__init__(self)
    84              m.Base1.__init__(self, i)
    85              m.Base2.__init__(self, j)
    86  
    87      class MI6(m.Base2, B1):
    88          def __init__(self, i):
    89              m.Base2.__init__(self, i)
    90              B1.__init__(self)
    91  
    92      class B2(B1):
    93          def v(self):
    94              return 2
    95  
    96      class B3:
    97          def v(self):
    98              return 3
    99  
   100      class B4(B3, B2):
   101          def v(self):
   102              return 4
   103  
   104      class MI7(B4, MI6):
   105          def __init__(self, i):
   106              B4.__init__(self)
   107              MI6.__init__(self, i)
   108  
   109      class MI8(MI6, B3):
   110          def __init__(self, i):
   111              MI6.__init__(self, i)
   112              B3.__init__(self)
   113  
   114      class MI8b(B3, MI6):
   115          def __init__(self, i):
   116              B3.__init__(self)
   117              MI6.__init__(self, i)
   118  
   119      mi1 = MI1(1, 2)
   120      assert mi1.foo() == 1
   121      assert mi1.bar() == 2
   122  
   123      mi2 = MI2(3, 4)
   124      assert mi2.v() == 1
   125      assert mi2.foo() == 3
   126      assert mi2.bar() == 4
   127  
   128      mi3 = MI3(5, 6)
   129      assert mi3.v() == 1
   130      assert mi3.foo() == 5
   131      assert mi3.bar() == 6
   132  
   133      mi4 = MI4(7, 8)
   134      assert mi4.v() == 1
   135      assert mi4.foo() == 7
   136      assert mi4.bar() == 8
   137  
   138      mi5 = MI5(10, 11)
   139      assert mi5.v() == 1
   140      assert mi5.foo() == 10
   141      assert mi5.bar() == 11
   142  
   143      mi6 = MI6(12)
   144      assert mi6.v() == 1
   145      assert mi6.bar() == 12
   146  
   147      mi7 = MI7(13)
   148      assert mi7.v() == 4
   149      assert mi7.bar() == 13
   150  
   151      mi8 = MI8(14)
   152      assert mi8.v() == 1
   153      assert mi8.bar() == 14
   154  
   155      mi8b = MI8b(15)
   156      assert mi8b.v() == 3
   157      assert mi8b.bar() == 15
   158  
   159  
   160  def test_multiple_inheritance_python_many_bases():
   161      class MIMany14(m.BaseN1, m.BaseN2, m.BaseN3, m.BaseN4):
   162          def __init__(self):
   163              m.BaseN1.__init__(self, 1)
   164              m.BaseN2.__init__(self, 2)
   165              m.BaseN3.__init__(self, 3)
   166              m.BaseN4.__init__(self, 4)
   167  
   168      class MIMany58(m.BaseN5, m.BaseN6, m.BaseN7, m.BaseN8):
   169          def __init__(self):
   170              m.BaseN5.__init__(self, 5)
   171              m.BaseN6.__init__(self, 6)
   172              m.BaseN7.__init__(self, 7)
   173              m.BaseN8.__init__(self, 8)
   174  
   175      class MIMany916(
   176          m.BaseN9,
   177          m.BaseN10,
   178          m.BaseN11,
   179          m.BaseN12,
   180          m.BaseN13,
   181          m.BaseN14,
   182          m.BaseN15,
   183          m.BaseN16,
   184      ):
   185          def __init__(self):
   186              m.BaseN9.__init__(self, 9)
   187              m.BaseN10.__init__(self, 10)
   188              m.BaseN11.__init__(self, 11)
   189              m.BaseN12.__init__(self, 12)
   190              m.BaseN13.__init__(self, 13)
   191              m.BaseN14.__init__(self, 14)
   192              m.BaseN15.__init__(self, 15)
   193              m.BaseN16.__init__(self, 16)
   194  
   195      class MIMany19(MIMany14, MIMany58, m.BaseN9):
   196          def __init__(self):
   197              MIMany14.__init__(self)
   198              MIMany58.__init__(self)
   199              m.BaseN9.__init__(self, 9)
   200  
   201      class MIMany117(MIMany14, MIMany58, MIMany916, m.BaseN17):
   202          def __init__(self):
   203              MIMany14.__init__(self)
   204              MIMany58.__init__(self)
   205              MIMany916.__init__(self)
   206              m.BaseN17.__init__(self, 17)
   207  
   208      # Inherits from 4 registered C++ classes: can fit in one pointer on any modern arch:
   209      a = MIMany14()
   210      for i in range(1, 4):
   211          assert getattr(a, "f" + str(i))() == 2 * i
   212  
   213      # Inherits from 8: requires 1/2 pointers worth of holder flags on 32/64-bit arch:
   214      b = MIMany916()
   215      for i in range(9, 16):
   216          assert getattr(b, "f" + str(i))() == 2 * i
   217  
   218      # Inherits from 9: requires >= 2 pointers worth of holder flags
   219      c = MIMany19()
   220      for i in range(1, 9):
   221          assert getattr(c, "f" + str(i))() == 2 * i
   222  
   223      # Inherits from 17: requires >= 3 pointers worth of holder flags
   224      d = MIMany117()
   225      for i in range(1, 17):
   226          assert getattr(d, "f" + str(i))() == 2 * i
   227  
   228  
   229  def test_multiple_inheritance_virtbase():
   230      class MITypePy(m.Base12a):
   231          def __init__(self, i, j):
   232              m.Base12a.__init__(self, i, j)
   233  
   234      mt = MITypePy(3, 4)
   235      assert mt.bar() == 4
   236      assert m.bar_base2a(mt) == 4
   237      assert m.bar_base2a_sharedptr(mt) == 4
   238  
   239  
   240  def test_mi_static_properties():
   241      """Mixing bases with and without static properties should be possible
   242      and the result should be independent of base definition order"""
   243  
   244      for d in (m.VanillaStaticMix1(), m.VanillaStaticMix2()):
   245          assert d.vanilla() == "Vanilla"
   246          assert d.static_func1() == "WithStatic1"
   247          assert d.static_func2() == "WithStatic2"
   248          assert d.static_func() == d.__class__.__name__
   249  
   250          m.WithStatic1.static_value1 = 1
   251          m.WithStatic2.static_value2 = 2
   252          assert d.static_value1 == 1
   253          assert d.static_value2 == 2
   254          assert d.static_value == 12
   255  
   256          d.static_value1 = 0
   257          assert d.static_value1 == 0
   258          d.static_value2 = 0
   259          assert d.static_value2 == 0
   260          d.static_value = 0
   261          assert d.static_value == 0
   262  
   263  
   264  # Requires PyPy 6+
   265  def test_mi_dynamic_attributes():
   266      """Mixing bases with and without dynamic attribute support"""
   267  
   268      for d in (m.VanillaDictMix1(), m.VanillaDictMix2()):
   269          d.dynamic = 1
   270          assert d.dynamic == 1
   271  
   272  
   273  def test_mi_unaligned_base():
   274      """Returning an offset (non-first MI) base class pointer should recognize the instance"""
   275  
   276      n_inst = ConstructorStats.detail_reg_inst()
   277  
   278      c = m.I801C()
   279      d = m.I801D()
   280      # + 4 below because we have the two instances, and each instance has offset base I801B2
   281      assert ConstructorStats.detail_reg_inst() == n_inst + 4
   282      b1c = m.i801b1_c(c)
   283      assert b1c is c
   284      b2c = m.i801b2_c(c)
   285      assert b2c is c
   286      b1d = m.i801b1_d(d)
   287      assert b1d is d
   288      b2d = m.i801b2_d(d)
   289      assert b2d is d
   290  
   291      assert ConstructorStats.detail_reg_inst() == n_inst + 4  # no extra instances
   292      del c, b1c, b2c
   293      assert ConstructorStats.detail_reg_inst() == n_inst + 2
   294      del d, b1d, b2d
   295      assert ConstructorStats.detail_reg_inst() == n_inst
   296  
   297  
   298  def test_mi_base_return():
   299      """Tests returning an offset (non-first MI) base class pointer to a derived instance"""
   300  
   301      n_inst = ConstructorStats.detail_reg_inst()
   302  
   303      c1 = m.i801c_b1()
   304      assert type(c1) is m.I801C
   305      assert c1.a == 1
   306      assert c1.b == 2
   307  
   308      d1 = m.i801d_b1()
   309      assert type(d1) is m.I801D
   310      assert d1.a == 1
   311      assert d1.b == 2
   312  
   313      assert ConstructorStats.detail_reg_inst() == n_inst + 4
   314  
   315      c2 = m.i801c_b2()
   316      assert type(c2) is m.I801C
   317      assert c2.a == 1
   318      assert c2.b == 2
   319  
   320      d2 = m.i801d_b2()
   321      assert type(d2) is m.I801D
   322      assert d2.a == 1
   323      assert d2.b == 2
   324  
   325      assert ConstructorStats.detail_reg_inst() == n_inst + 8
   326  
   327      del c2
   328      assert ConstructorStats.detail_reg_inst() == n_inst + 6
   329      del c1, d1, d2
   330      assert ConstructorStats.detail_reg_inst() == n_inst
   331  
   332      # Returning an unregistered derived type with a registered base; we won't
   333      # pick up the derived type, obviously, but should still work (as an object
   334      # of whatever type was returned).
   335      e1 = m.i801e_c()
   336      assert type(e1) is m.I801C
   337      assert e1.a == 1
   338      assert e1.b == 2
   339  
   340      e2 = m.i801e_b2()
   341      assert type(e2) is m.I801B2
   342      assert e2.b == 2
   343  
   344  
   345  def test_diamond_inheritance():
   346      """Tests that diamond inheritance works as expected (issue #959)"""
   347  
   348      # Issue #959: this shouldn't segfault:
   349      d = m.D()
   350  
   351      # Make sure all the various distinct pointers are all recognized as registered instances:
   352      assert d is d.c0()
   353      assert d is d.c1()
   354      assert d is d.b()
   355      assert d is d.c0().b()
   356      assert d is d.c1().b()
   357      assert d is d.c0().c1().b().c0().b()
   358  
   359  
   360  def test_pr3635_diamond_b():
   361      o = m.MVB()
   362      assert o.b == 1
   363  
   364      assert o.get_b_b() == 1
   365  
   366  
   367  def test_pr3635_diamond_c():
   368      o = m.MVC()
   369      assert o.b == 1
   370      assert o.c == 2
   371  
   372      assert o.get_b_b() == 1
   373      assert o.get_c_b() == 1
   374  
   375      assert o.get_c_c() == 2
   376  
   377  
   378  def test_pr3635_diamond_d0():
   379      o = m.MVD0()
   380      assert o.b == 1
   381      assert o.c == 2
   382      assert o.d0 == 3
   383  
   384      assert o.get_b_b() == 1
   385      assert o.get_c_b() == 1
   386      assert o.get_d0_b() == 1
   387  
   388      assert o.get_c_c() == 2
   389      assert o.get_d0_c() == 2
   390  
   391      assert o.get_d0_d0() == 3
   392  
   393  
   394  def test_pr3635_diamond_d1():
   395      o = m.MVD1()
   396      assert o.b == 1
   397      assert o.c == 2
   398      assert o.d1 == 4
   399  
   400      assert o.get_b_b() == 1
   401      assert o.get_c_b() == 1
   402      assert o.get_d1_b() == 1
   403  
   404      assert o.get_c_c() == 2
   405      assert o.get_d1_c() == 2
   406  
   407      assert o.get_d1_d1() == 4
   408  
   409  
   410  def test_pr3635_diamond_e():
   411      o = m.MVE()
   412      assert o.b == 1
   413      assert o.c == 2
   414      assert o.d0 == 3
   415      assert o.d1 == 4
   416      assert o.e == 5
   417  
   418      assert o.get_b_b() == 1
   419      assert o.get_c_b() == 1
   420      assert o.get_d0_b() == 1
   421      assert o.get_d1_b() == 1
   422      assert o.get_e_b() == 1
   423  
   424      assert o.get_c_c() == 2
   425      assert o.get_d0_c() == 2
   426      assert o.get_d1_c() == 2
   427      assert o.get_e_c() == 2
   428  
   429      assert o.get_d0_d0() == 3
   430      assert o.get_e_d0() == 3
   431  
   432      assert o.get_d1_d1() == 4
   433      assert o.get_e_d1() == 4
   434  
   435      assert o.get_e_e() == 5
   436  
   437  
   438  def test_pr3635_diamond_f():
   439      o = m.MVF()
   440      assert o.b == 1
   441      assert o.c == 2
   442      assert o.d0 == 3
   443      assert o.d1 == 4
   444      assert o.e == 5
   445      assert o.f == 6
   446  
   447      assert o.get_b_b() == 1
   448      assert o.get_c_b() == 1
   449      assert o.get_d0_b() == 1
   450      assert o.get_d1_b() == 1
   451      assert o.get_e_b() == 1
   452      assert o.get_f_b() == 1
   453  
   454      assert o.get_c_c() == 2
   455      assert o.get_d0_c() == 2
   456      assert o.get_d1_c() == 2
   457      assert o.get_e_c() == 2
   458      assert o.get_f_c() == 2
   459  
   460      assert o.get_d0_d0() == 3
   461      assert o.get_e_d0() == 3
   462      assert o.get_f_d0() == 3
   463  
   464      assert o.get_d1_d1() == 4
   465      assert o.get_e_d1() == 4
   466      assert o.get_f_d1() == 4
   467  
   468      assert o.get_e_e() == 5
   469      assert o.get_f_e() == 5
   470  
   471      assert o.get_f_f() == 6
   472  
   473  
   474  def test_python_inherit_from_mi():
   475      """Tests extending a Python class from a single inheritor of a MI class"""
   476  
   477      class PyMVF(m.MVF):
   478          g = 7
   479  
   480          def get_g_g(self):
   481              return self.g
   482  
   483      o = PyMVF()
   484  
   485      assert o.b == 1
   486      assert o.c == 2
   487      assert o.d0 == 3
   488      assert o.d1 == 4
   489      assert o.e == 5
   490      assert o.f == 6
   491      assert o.g == 7
   492  
   493      assert o.get_g_g() == 7