From 022a2b1adef8417048f235a0e037c4332abacd84 Mon Sep 17 00:00:00 2001
From: Lovell Fuller <github@lovell.info>
Date: Wed, 15 Jul 2015 09:37:25 +0100
Subject: [PATCH] Ensure test coverage of overlayWith error paths

---
 test/unit/overlay.js | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/test/unit/overlay.js b/test/unit/overlay.js
index 82641e91..9eff6dc3 100755
--- a/test/unit/overlay.js
+++ b/test/unit/overlay.js
@@ -161,4 +161,15 @@ describe('Overlays', function() {
       });
   });
 
+  it('Fail with empty String parameter', function() {
+    assert.throws(function() {
+      sharp().overlayWith('');
+    });
+  });
+
+  it('Fail with non-String parameter', function() {
+    assert.throws(function() {
+      sharp().overlayWith(1);
+    });
+  });
 });