1 files changed, 24 insertions, 0 deletions
diff --git a/js/vendor/es6-shim/test-sham/set-prototype-of.js b/js/vendor/es6-shim/test-sham/set-prototype-of.js
new file mode 100644
index 000000000..d68f930fd
--- /dev/null
+++ b/js/vendor/es6-shim/test-sham/set-prototype-of.js
@@ -0,0 +1,24 @@
+describe('Object.setPrototypeOf(o, p)', function() {
+
+  it('changes prototype to regular objects', function() {
+    var obj = {a: 123};
+    expect(obj instanceof Object).to.equal(true);
+    // sham requires assignment to work cross browser
+    obj = Object.setPrototypeOf(obj, null);
+    expect(obj instanceof Object).to.equal(false);
+    expect(obj.a).to.equal(123);
+  });
+
+  it('changes prototype to null objects', function() {
+    var obj = Object.create(null);
+    obj.a = 456;
+    expect(obj instanceof Object).to.equal(false);
+    expect(obj.a).to.equal(456);
+    // sham requires assignment to work cross browser
+    obj = Object.setPrototypeOf(obj, {});
+    expect(obj instanceof Object).to.equal(true);
+    expect(obj.a).to.equal(456);
+  });
+
+});
+