# __abs__

assert abs(complex(3, 4)) == 5
assert abs(complex(3, -4)) == 5
assert abs(complex(1.5, 2.5)) == 2.9154759474226504

# __eq__

assert complex(1, -1) == complex(1, -1)
assert complex(1, 0) == 1
assert 1 == complex(1, 0)
assert complex(1, 1) != 1
assert 1 != complex(1, 1)
assert complex(1, 0) == 1.0
assert 1.0 == complex(1, 0)
assert complex(1, 1) != 1.0
assert 1.0 != complex(1, 1)
assert complex(1, 0) != 1.5
assert not 1.0 != complex(1, 0)
assert bool(complex(1, 0))
assert complex(1, 2) != complex(1, 1)
assert complex(1, 2) != 'foo'
assert complex(1, 2).__eq__('foo') == NotImplemented

# __neg__

assert -complex(1, -1) == complex(-1, 1)
assert -complex(0, 0) == complex(0, 0)

# real

a = complex(3, 4)
b = 4j
assert a.real == 3
assert b.real == 0

# imag

assert a.imag == 4
assert b.imag == 4

# int and complex addition
assert 1 + 1j == complex(1, 1)
assert 1j + 1 == complex(1, 1)
assert (1j + 1) + 3 == complex(4, 1)
assert 3 + (1j + 1) == complex(4, 1)