package langext

import (
	"git.blackforestbytes.com/BlackForestBytes/goext/tst"
	"testing"
)

func TestRandBytesLength(t *testing.T) {
	for _, sz := range []int{0, 1, 16, 32, 1024} {
		b := RandBytes(sz)
		tst.AssertEqual(t, len(b), sz)
	}
}

func TestRandBytesDistinct(t *testing.T) {
	a := RandBytes(32)
	b := RandBytes(32)

	// Two cryptographic random sequences should not be equal in 32 bytes.
	if len(a) != 32 || len(b) != 32 {
		t.Fatalf("unexpected length")
	}

	equal := true
	for i := range a {
		if a[i] != b[i] {
			equal = false
			break
		}
	}
	if equal {
		t.Errorf("two consecutive 32-byte RandBytes calls returned identical results")
	}
}