1 files changed, 8 insertions, 0 deletions
diff --git a/test/lib/enum.spec.js b/test/lib/enum.spec.js
index 04e1015f42..0f5d6ee4d1 100644
--- a/test/lib/enum.spec.js
+++ b/test/lib/enum.spec.js
@@ -13,4 +13,12 @@ describe('enum', () => {
     expect(() => e.ANYWHERE = 'ANYWHERE').to.throw();
   });
 
+  it('should be able to validate enum keys', () => {
+    let e = Enum('NORTH', 'SOUTH', 'WEST', 'EAST');
+    expect(e.isValid('SOUTH')).to.be.true;
+    expect(e.isValid('ANYWHERE')).to.be.false;
+    expect(e.isValid()).to.be.false;
+    expect(e.isValid(null)).to.be.false;
+  })
+
 });