diff --git a/test/backend.spec.js b/test/backend.spec.js
index 4f00c0b1..ea04439a 100644
--- a/test/backend.spec.js
+++ b/test/backend.spec.js
@@ -1,10 +1,37 @@
+const { genSecret } = require("../src/util");
+
 beforeAll(() => {
 
 });
 
-describe("", () => {
+describe("Test genSecret", () => {
+
+    it("should be correct length", () => {
+        let secret = genSecret(-1);
+        expect(secret).toEqual("");
+
+        secret = genSecret(0);
+        expect(secret).toEqual("");
+
+        secret = genSecret(1);
+        expect(secret.length).toEqual(1);
 
-    it("should ", () => {
+        secret = genSecret(2);
+        expect(secret.length).toEqual(2);
+
+        secret = genSecret(64);
+        expect(secret.length).toEqual(64);
+
+        secret = genSecret(9000);
+        expect(secret.length).toEqual(9000);
+
+        secret = genSecret(90000);
+        expect(secret.length).toEqual(90000);
+    });
 
+    it("should contain first and last possible chars", () => {
+        let secret = genSecret(90000);
+        expect(secret).toContain("A");
+        expect(secret).toContain("9");
     });
 });