def test_mi_unaligned_base():
"""Returning an offset (non-first MI) base class pointer should recognize the instance"""
n_inst = ConstructorStats.detail_reg_inst()
c = m.I801C()
d = m.I801D()
# + 4 below because we have the two instances, and each instance has offset base I801B2
assert ConstructorStats.detail_reg_inst() == n_inst + 4
b1c = m.i801b1_c(c)
assert b1c is c
b2c = m.i801b2_c(c)
assert b2c is c
b1d = m.i801b1_d(d)
assert b1d is d
b2d = m.i801b2_d(d)
assert b2d is d
assert ConstructorStats.detail_reg_inst() == n_inst + 4 # no extra instances
del c, b1c, b2c
assert ConstructorStats.detail_reg_inst() == n_inst + 2
del d, b1d, b2d
assert ConstructorStats.detail_reg_inst() == n_inst
def test_mi_unaligned_base():
"""Returning an offset (non-first MI) base class pointer should recognize the instance"""
n_inst = ConstructorStats.detail_reg_inst()
c = m.I801C()
d = m.I801D()
# + 4 below because we have the two instances, and each instance has offset base I801B2
assert ConstructorStats.detail_reg_inst() == n_inst + 4
b1c = m.i801b1_c(c)
assert b1c is c
b2c = m.i801b2_c(c)
assert b2c is c
b1d = m.i801b1_d(d)
assert b1d is d
b2d = m.i801b2_d(d)
assert b2d is d
assert ConstructorStats.detail_reg_inst() == n_inst + 4 # no extra instances
del c, b1c, b2c
assert ConstructorStats.detail_reg_inst() == n_inst + 2
del d, b1d, b2d
assert ConstructorStats.detail_reg_inst() == n_inst
