1 files changed, 35 insertions, 0 deletions
diff --git a/std/uuid/v4_test.ts b/std/uuid/v4_test.ts
new file mode 100644
index 000000000..f8daf132e
--- /dev/null
+++ b/std/uuid/v4_test.ts
@@ -0,0 +1,35 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+import { assert, assertEquals } from "../testing/asserts.ts";
+import { generate, validate } from "./v4.ts";
+
+Deno.test({
+  name: "[UUID] test_uuid_v4",
+  fn(): void {
+    const u = generate();
+    assertEquals(typeof u, "string", "returns a string");
+    assert(u !== "", "return string is not empty");
+  },
+});
+
+Deno.test({
+  name: "[UUID] test_uuid_v4_format",
+  fn(): void {
+    for (let i = 0; i < 10000; i++) {
+      const u = generate() as string;
+      assert(validate(u), `${u} is not a valid uuid v4`);
+    }
+  },
+});
+
+Deno.test({
+  name: "[UUID] is_valid_uuid_v4",
+  fn(): void {
+    const u = generate();
+    const t = "84fb7824-b951-490e-8afd-0c13228a8282";
+    const n = "84fb7824-b951-490g-8afd-0c13228a8282";
+
+    assert(validate(u), `generated ${u} should be valid`);
+    assert(validate(t), `${t} should be valid`);
+    assert(!validate(n), `${n} should not be valid`);
+  },
+});