Add tests for createBoundary helper.

Author: octet-stream

lib/util/createBoundary.test.ts

@@ -0,0 +1,22 @@
+import test from "ava"
+
+import createBoundary from "./createBoundary"
+
+test("Returns a string", t => {
+  const actual = createBoundary(16)
+
+  t.is(typeof actual, "string")
+})
+
+test("Returns a string of given length", t => {
+  const expected = 24
+  const actual = createBoundary(expected)
+
+  t.is(actual.length, expected)
+})
+
+test("Returns a string of characters in alphanum range", t => {
+  const actual = createBoundary(16)
+
+  t.regex(actual, /^[a-zA-Z0-9]+$/)
+})