1 files changed, 13 insertions, 0 deletions
diff --git a/test/helpers.unit.js b/test/helpers.unit.js
index 5c8b31d5..f08be413 100644
--- a/test/helpers.unit.js
+++ b/test/helpers.unit.js
@@ -43,6 +43,19 @@ describe("helpers.js", function () {
             var shuffled = faker.helpers.shuffle([]);
             assert.ok(shuffled.length === 0);
         });
+
+        it("mutates the input array in place", function () {
+            var input = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j"];
+            var shuffled = faker.helpers.shuffle(input);
+            assert.deepEqual(shuffled, input);
+        });
+
+        it("all items shuffled as expected when seeded", function () {
+            var input = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j"];
+            faker.seed(100);
+            var shuffled = faker.helpers.shuffle(input);
+            assert.deepEqual(shuffled, ["b", "e", "a", "d", "j", "i", "h", "c", "g", "f"]);
+        });
     });
 
     describe("slugify()", function () {