Fix #2316: handle absent Promise (#2317)

sinonjs · Dec 9, 2020 · ef0404e · ef0404e
1 parent e3a8fca
commit ef0404e
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/lib/sinon/fake.js b/lib/sinon/fake.js
@@ -38,7 +38,10 @@ function wrapFunc(f) {
 }
 
 function fakeClass() {
-    var promiseLib = Promise;
+    var promiseLib = null;
+    if (typeof Promise === "function") {
+        promiseLib = Promise;
+    }
 
     function fake(f) {
         if (arguments.length > 0 && typeof f !== "function") {