1 files changed, 14 insertions, 0 deletions
diff --git a/javascript/videojs/test/unit/utils/promise.test.js b/javascript/videojs/test/unit/utils/promise.test.js
new file mode 100644
index 0000000..bafd76f
--- /dev/null
+++ b/javascript/videojs/test/unit/utils/promise.test.js
@@ -0,0 +1,14 @@
+/* eslint-env qunit */
+import window from 'global/window';
+import * as promise from '../../../src/js/utils/promise';
+
+QUnit.module('utils/promise');
+
+QUnit.test('can correctly identify a native Promise (if supported)', function(assert) {
+  assert.ok(promise.isPromise(new window.Promise((resolve) => resolve())), 'a native Promise was recognized');
+});
+
+QUnit.test('can identify a Promise-like object', function(assert) {
+  assert.notOk(promise.isPromise({}), 'an object without a `then` method is not Promise-like');
+  assert.ok(promise.isPromise({then: () => {}}), 'an object with a `then` method is Promise-like');
+});