1 files changed, 25 insertions, 0 deletions
diff --git a/spec/javascripts/extensions/object_spec.js b/spec/javascripts/extensions/object_spec.js
new file mode 100644
index 00000000000..2467ed78459
--- /dev/null
+++ b/spec/javascripts/extensions/object_spec.js
@@ -0,0 +1,25 @@
+require('~/extensions/object');
+
+describe('Object extensions', () => {
+  describe('assign', () => {
+    it('merges source object into target object', () => {
+      const targetObj = {};
+      const sourceObj = {
+        foo: 'bar',
+      };
+      Object.assign(targetObj, sourceObj);
+      expect(targetObj.foo).toBe('bar');
+    });
+
+    it('merges object with the same properties', () => {
+      const targetObj = {
+        foo: 'bar',
+      };
+      const sourceObj = {
+        foo: 'baz',
+      };
+      Object.assign(targetObj, sourceObj);
+      expect(targetObj.foo).toBe('baz');
+    });
+  });
+});