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def assert_complex(real, exp)
assert_float real.real, exp.real
assert_float real.imaginary, exp.imaginary
end
assert 'Complex' do
c = 123i
assert_equal Complex, c.class
assert_equal [c.real, c.imaginary], [0, 123]
c = 123 + -1.23i
assert_equal Complex, c.class
assert_equal [c.real, c.imaginary], [123, -1.23]
end
assert 'Complex::polar' do
assert_complex Complex.polar(3, 0), (3 + 0i)
assert_complex Complex.polar(3, Math::PI/2), (0 + 3i)
assert_complex Complex.polar(3, Math::PI), (-3 + 0i)
assert_complex Complex.polar(3, -Math::PI/2), (0 + -3i)
end
assert 'Complex::rectangular' do
assert_complex Complex.rectangular(1, 2), (1 + 2i)
end
assert 'Complex#*' do
assert_complex Complex(2, 3) * Complex(2, 3), (-5 + 12i)
assert_complex Complex(900) * Complex(1), (900 + 0i)
assert_complex Complex(-2, 9) * Complex(-9, 2), (0 - 85i)
assert_complex Complex(9, 8) * 4, (36 + 32i)
assert_complex Complex(20, 9) * 9.8, (196.0 + 88.2i)
end
assert 'Complex#+' do
assert_complex Complex(2, 3) + Complex(2, 3) , (4 + 6i)
assert_complex Complex(900) + Complex(1) , (901 + 0i)
assert_complex Complex(-2, 9) + Complex(-9, 2), (-11 + 11i)
assert_complex Complex(9, 8) + 4 , (13 + 8i)
assert_complex Complex(20, 9) + 9.8 , (29.8 + 9i)
end
assert 'Complex#-' do
assert_complex Complex(2, 3) - Complex(2, 3) , (0 + 0i)
assert_complex Complex(900) - Complex(1) , (899 + 0i)
assert_complex Complex(-2, 9) - Complex(-9, 2), (7 + 7i)
assert_complex Complex(9, 8) - 4 , (5 + 8i)
assert_complex Complex(20, 9) - 9.8 , (10.2 + 9i)
end
assert 'Complex#-@' do
assert_complex -Complex(1, 2), (-1 - 2i)
end
assert 'Complex#/' do
assert_complex Complex(2, 3) / Complex(2, 3) , (1 + 0i)
assert_complex Complex(900) / Complex(1) , (900 + 0i)
assert_complex Complex(-2, 9) / Complex(-9, 2), ((36 / 85) - (77i / 85))
assert_complex Complex(9, 8) / 4 , ((9 / 4) + 2i)
assert_complex Complex(20, 9) / 9.8 , (2.0408163265306123 + 0.9183673469387754i)
end
assert 'Complex#==' do
assert_true Complex(2, 3) == Complex(2, 3)
assert_true Complex(5) == 5
assert_true Complex(0) == 0.0
end
assert 'Complex#abs' do
assert_float Complex(-1).abs, 1
assert_float Complex(3.0, -4.0).abs, 5.0
end
assert 'Complex#abs2' do
assert_float Complex(-1).abs2, 1
assert_float Complex(3.0, -4.0).abs2, 25.0
end
assert 'Complex#arg' do
assert_float Complex.polar(3, Math::PI/2).arg, 1.5707963267948966
end
assert 'Complex#conjugate' do
assert_complex Complex(1, 2).conjugate, (1 - 2i)
end
assert 'Complex#fdiv' do
assert_complex Complex(11, 22).fdiv(3), (3.6666666666666665 + 7.333333333333333i)
end
assert 'Complex#imaginary' do
assert_float Complex(7).imaginary , 0
assert_float Complex(9, -4).imaginary, -4
end
assert 'Complex#polar' do
assert_equal Complex(1, 2).polar, [2.23606797749979, 1.1071487177940904]
end
assert 'Complex#real' do
assert_float Complex(7).real, 7
assert_float Complex(9, -4).real, 9
end
assert 'Complex#real?' do
assert_false Complex(1).real?
end
assert 'Complex::rectangular' do
assert_equal Complex(1, 2).rectangular, [1, 2]
end
assert 'Complex::to_c' do
assert_equal Complex(1, 2).to_c, Complex(1, 2)
end
assert 'Complex::to_f' do
assert_float Complex(1, 0).to_f, 1.0
assert_raise(RangeError) do
Complex(1, 2).to_f
end
end
assert 'Complex::to_i' do
assert_equal Complex(1, 0).to_i, 1
assert_raise(RangeError) do
Complex(1, 2).to_i
end
end
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