Test .set(key, value, ttl) sets a value that expires

packages/keyv/package.json

@@ -31,6 +31,7 @@
   "devDependencies": {
     "ava": "^0.19.1",
     "coveralls": "^2.13.1",
+    "delay": "^2.0.0",
     "eslint-config-xo-lukechilds": "^1.0.0",
     "nyc": "^10.3.2",
     "xo": "^0.19.0"

packages/keyv/test/unit.js

@@ -1,4 +1,5 @@
 import test from 'ava';
+import delay from 'delay';
 import Keyv from '../';
 
 test('Keyv is a class', t => {
@@ -21,6 +22,14 @@ test('.set(key, value) resolves to value', async t => {
 	t.is(await store.set('foo', 'bar'), 'bar');
 });
 
+test('.set(key, value, ttl) sets a value that expires', async t => {
+	const store = new Keyv();
+	t.is(await store.set('foo', 'bar', 100), 'bar');
+	t.is(await store.get('foo'), 'bar');
+	await delay(100);
+	t.is(await store.get('foo'), undefined);
+});
+
 test('.get(key) returns a Promise', t => {
 	const store = new Keyv();
 	t.true(store.get('foo') instanceof Promise);