From 9fb85d42986dd847735a1128d002e1e4bea00a95 Mon Sep 17 00:00:00 2001
From: alexcjohnson <alex@plot.ly>
Date: Thu, 8 Mar 2018 13:16:52 -0500
Subject: [PATCH] throw an error if the test window is hidden when we try to
 emit a mouse event, which the browser may ignore if it's hidden

---
 test/jasmine/assets/mouse_event.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/test/jasmine/assets/mouse_event.js b/test/jasmine/assets/mouse_event.js
index 311842902f3..f8316c5c564 100644
--- a/test/jasmine/assets/mouse_event.js
+++ b/test/jasmine/assets/mouse_event.js
@@ -1,6 +1,11 @@
 var Lib = require('../../../src/lib');
 
 module.exports = function(type, x, y, opts) {
+    var visibility = document.visibilityState;
+    if(visibility && visibility !== 'visible') {
+        throw new Error('document.visibilityState = "' + visibility + '" - Please make the window visible.');
+    }
+
     var fullOpts = {
         bubbles: true,
         clientX: x,