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63 lines
1.4 KiB
V
63 lines
1.4 KiB
V
import math
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fn test_gcd() {
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assert math.gcd(6, 9) == 3
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assert math.gcd(6, -9) == 3
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assert math.gcd(-6, -9) == 3
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assert math.gcd(0, 0) == 0
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}
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fn test_lcm() {
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assert math.lcm(2, 3) == 6
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assert math.lcm(-2, 3) == 6
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assert math.lcm(-2, -3) == 6
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assert math.lcm(0, 0) == 0
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}
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fn test_digits() {
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digits_in_10th_base := math.digits(125, 10)
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assert digits_in_10th_base[0] == 5
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assert digits_in_10th_base[1] == 2
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assert digits_in_10th_base[2] == 1
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digits_in_16th_base := math.digits(15, 16)
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assert digits_in_16th_base[0] == 15
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negative_digits := math.digits(-4, 2)
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assert negative_digits[2] == -1
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}
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fn test_factorial() {
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assert math.factorial(12) == 479001600
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assert math.factorial(5) == 120
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assert math.factorial(0) == 1
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}
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fn test_erf() {
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assert math.erf(0) == 0
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assert math.erf(1.5) + math.erf(-1.5) == 0
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assert math.erfc(0) == 1
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assert math.erf(2.5) + math.erfc(2.5) == 1
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assert math.erfc(3.6) + math.erfc(-3.6) == 2
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}
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fn test_gamma() {
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assert math.gamma(1) == 1
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assert math.gamma(5) == 24
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sval := '2.453737'
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assert math.log_gamma(4.5).str() == sval
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assert math.log(math.gamma(4.5)).str() == sval
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assert math.abs( math.log_gamma(4.5) - math.log(math.gamma(4.5)) ) < 0.000001
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// assert math.log_gamma(4.5) == math.log(math.gamma(4.5)) /* <-- fails on alpine/musl
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}
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fn test_mod() {
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assert 4 % 2 == 0
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x := 2
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assert u64(5) % x == 1
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mut a := 10
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a %= 2
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assert a == 0
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}
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