191 lines
3.3 KiB
V
191 lines
3.3 KiB
V
import rand
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const (
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rnd_count = 40
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seeds = [[u32(42), 0], [u32(256), 0]]
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)
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fn get_n_random_ints(seed_data []u32, n int) []int {
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mut values := []int{cap: n}
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rand.seed(seed_data)
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for _ in 0 .. n {
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values << rand.intn(n)
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}
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return values
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}
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fn test_rand_reproducibility() {
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for seed in seeds {
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array1 := get_n_random_ints(seed, 1000)
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array2 := get_n_random_ints(seed, 1000)
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assert array1.len == array2.len
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assert array1 == array2
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}
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}
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fn test_rand_u32n() {
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max := u32(16384)
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for _ in 0 .. rnd_count {
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value := rand.u32n(max)
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assert value >= 0
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assert value < max
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}
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}
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fn test_rand_u64n() {
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max := u64(379091181005)
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for _ in 0 .. rnd_count {
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value := rand.u64n(max)
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assert value >= 0
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assert value < max
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}
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}
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fn test_rand_u32_in_range() {
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max := u32(484468466)
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min := u32(316846)
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for _ in 0 .. rnd_count {
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value := rand.u32_in_range(min, max)
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assert value >= min
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assert value < max
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}
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}
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fn test_rand_u64_in_range() {
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max := u64(216468454685163)
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min := u64(6848646868)
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for _ in 0 .. rnd_count {
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value := rand.u64_in_range(min, max)
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assert value >= min
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assert value < max
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}
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}
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fn test_rand_intn() {
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max := 2525642
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for _ in 0 .. rnd_count {
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value := rand.intn(max)
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assert value >= 0
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assert value < max
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}
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}
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fn test_rand_i64n() {
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max := i64(3246727724653636)
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for _ in 0 .. rnd_count {
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value := rand.i64n(max)
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assert value >= 0
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assert value < max
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}
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}
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fn test_rand_int_in_range() {
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min := -4252
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max := 23054962
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for _ in 0 .. rnd_count {
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value := rand.int_in_range(min, max)
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assert value >= min
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assert value < max
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}
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}
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fn test_rand_i64_in_range() {
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min := i64(-24095)
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max := i64(324058)
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for _ in 0 .. rnd_count {
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value := rand.i64_in_range(min, max)
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assert value >= min
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assert value < max
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}
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}
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fn test_rand_int31() {
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max_u31 := int(0x7FFFFFFF)
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sign_mask := int(0x80000000)
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for _ in 0 .. rnd_count {
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value := rand.int31()
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assert value >= 0
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assert value <= max_u31
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// This statement ensures that the sign bit is zero
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assert (value & sign_mask) == 0
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}
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}
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fn test_rand_int63() {
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max_u63 := i64(0x7FFFFFFFFFFFFFFF)
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sign_mask := i64(0x8000000000000000)
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for _ in 0 .. rnd_count {
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value := rand.int63()
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assert value >= 0
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assert value <= max_u63
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assert (value & sign_mask) == 0
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}
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}
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fn test_rand_f32() {
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for _ in 0 .. rnd_count {
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value := rand.f32()
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assert value >= 0.0
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assert value < 1.0
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}
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}
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fn test_rand_f64() {
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for _ in 0 .. rnd_count {
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value := rand.f64()
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assert value >= 0.0
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assert value < 1.0
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}
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}
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fn test_rand_f32n() {
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max := f32(357.0)
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for _ in 0 .. rnd_count {
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value := rand.f32n(max)
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assert value >= 0.0
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assert value < max
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}
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}
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fn test_rand_f64n() {
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max := f64(1.52e6)
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for _ in 0 .. rnd_count {
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value := rand.f64n(max)
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assert value >= 0.0
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assert value < max
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}
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}
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fn test_rand_f32_in_range() {
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min := f32(-24.0)
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max := f32(125.0)
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for _ in 0 .. rnd_count {
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value := rand.f32_in_range(min, max)
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assert value >= min
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assert value < max
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}
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}
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fn test_rand_f64_in_range() {
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min := f64(-548.7)
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max := f64(5015.2)
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for _ in 0 .. rnd_count {
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value := rand.f64_in_range(min, max)
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assert value >= min
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assert value < max
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}
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}
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fn test_rand_byte() {
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mut all := []byte{}
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for _ in 0 .. 256 {
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x := rand.byte()
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assert x >= 0
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assert x <= 255
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all << x
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}
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all.sort(a < b)
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assert all[0] != all[255]
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assert all[0] != all[128]
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}
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