v/vlib/math/log_test.v

import math

fn test_log_base() {
	assert math.log(math.e) == 1.0
}

fn test_log2_base() {
	assert math.log2(2.0) == 1.0
}

fn test_log10_base() {
	assert math.log10(10.0) == 1.0
	assert math.log10(0.00000000000000001) == -17.0
}

fn test_log1p_base() {
	assert math.log1p(math.e - 1) == 1.0
}

fn test_log_b_base() {
	assert math.log_b(2.0) == 1.0
}