feat(rands): initial implementation

rands_test.go

@@ -0,0 +1,18 @@
+package rands
+
+var testCases = []struct {
+	name string
+	n    int
+}{
+	{name: "n=0", n: 0},
+	{name: "n=1", n: 1},
+	{name: "n=2", n: 2},
+	{name: "n=7", n: 7},
+	{name: "n=8", n: 8},
+	{name: "n=16", n: 16},
+	{name: "n=32", n: 32},
+	{name: "n=128", n: 128},
+	{name: "n=1024", n: 1024},
+	{name: "n=409600", n: 409600},
+	{name: "n=2394345", n: 2394345},
+}