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120 lines
3.2 KiB
Go
120 lines
3.2 KiB
Go
import math
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// Tests are based on and verified from practice examples of Khan Academy
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// https://www.khanacademy.org/math/precalculus/imaginary-and-complex-numbers
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fn test_complex_addition() {
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mut c1 := math.complex(0,-10)
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mut c2 := math.complex(-40,8)
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mut result := c1 + c2
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assert result.equals(math.complex(-40,-2))
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c1 = math.complex(-71,2)
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c2 = math.complex(88,-12)
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result = c1 + c2
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assert result.equals(math.complex(17,-10))
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c1 = math.complex(0,-30)
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c2 = math.complex(52,-30)
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result = c1 + c2
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assert result.equals(math.complex(52,-60))
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c1 = math.complex(12,-9)
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c2 = math.complex(32,-6)
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result = c1 + c2
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assert result.equals(math.complex(44,-15))
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}
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fn test_complex_subtraction() {
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mut c1 := math.complex(-8,0)
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mut c2 := math.complex(6,30)
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mut result := c1 - c2
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assert result.equals(math.complex(-14,-30))
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c1 = math.complex(-19,7)
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c2 = math.complex(29,32)
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result = c1 - c2
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assert result.equals(math.complex(-48,-25))
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c1 = math.complex(12,0)
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c2 = math.complex(23,13)
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result = c1 - c2
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assert result.equals(math.complex(-11,-13))
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c1 = math.complex(-14,3)
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c2 = math.complex(0,14)
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result = c1 - c2
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assert result.equals(math.complex(-14,-11))
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}
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fn test_complex_multiplication() {
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mut c1 := math.complex(1,2)
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mut c2 := math.complex(1,-4)
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mut result := c1.multiply(c2)
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assert result.equals(math.complex(9,-2))
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c1 = math.complex(-4,-4)
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c2 = math.complex(-5,-3)
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result = c1.multiply(c2)
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assert result.equals(math.complex(8,32))
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c1 = math.complex(4,4)
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c2 = math.complex(-2,-5)
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result = c1.multiply(c2)
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assert result.equals(math.complex(12,-28))
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c1 = math.complex(2,-2)
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c2 = math.complex(4,-4)
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result = c1.multiply(c2)
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assert result.equals(math.complex(0,-16))
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}
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fn test_complex_division() {
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mut c1 := math.complex(-9,-6)
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mut c2 := math.complex(-3,-2)
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mut result := c1.divide(c2)
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assert result.equals(math.complex(3,0))
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c1 = math.complex(-23,11)
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c2 = math.complex(5,1)
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result = c1.divide(c2)
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assert result.equals(math.complex(-4,3))
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c1 = math.complex(8,-2)
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c2 = math.complex(-4,1)
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result = c1.divide(c2)
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assert result.equals(math.complex(-2,0))
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c1 = math.complex(11,24)
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c2 = math.complex(-4,-1)
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result = c1.divide(c2)
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assert result.equals(math.complex(-4,-5))
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}
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fn test_complex_conjugate() {
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mut c1 := math.complex(0,8)
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mut result := c1.conjugate()
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assert result.equals(math.complex(0,-8))
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c1 = math.complex(7,3)
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result = c1.conjugate()
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assert result.equals(math.complex(7,-3))
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c1 = math.complex(2,2)
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result = c1.conjugate()
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assert result.equals(math.complex(2,-2))
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c1 = math.complex(7,0)
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result = c1.conjugate()
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assert result.equals(math.complex(7,0))
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}
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fn test_complex_equals() {
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mut c1 := math.complex(0,8)
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mut c2 := math.complex(0,8)
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assert c1.equals(c2)
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c1 = math.complex(-3,19)
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c2 = math.complex(-3,19)
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assert c1.equals(c2)
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}
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fn test_complex_angle(){
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mut c := math.complex(1, 0)
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assert c.angle() * 180 / math.Pi == 0
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c = math.complex(1, 1)
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assert c.angle() * 180 / math.Pi == 45
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c = math.complex(0, 1)
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assert c.angle() * 180 / math.Pi == 90
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c = math.complex(-1, 1)
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assert c.angle() * 180 / math.Pi == 135
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c = math.complex(-1, -1)
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assert c.angle() * 180 / math.Pi == -135
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mut cc := c.conjugate()
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assert cc.angle() + c.angle() == 0
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}
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