From 946710f2e9960b3839613d4bdf730e57ba38a964 Mon Sep 17 00:00:00 2001
From: Alex Pashkov <alexpashkov123@gmail.com>
Date: Mon, 9 Sep 2019 16:22:29 +0300
Subject: [PATCH] Add unit test

---
 modules/viBidAdapter.js                |  9 +++++----
 test/spec/modules/viBidAdapter_spec.js | 19 ++++++++++++++++++-
 2 files changed, 23 insertions(+), 5 deletions(-)

diff --git a/modules/viBidAdapter.js b/modules/viBidAdapter.js
index f3093bc640f6..8d8cb06e47e4 100644
--- a/modules/viBidAdapter.js
+++ b/modules/viBidAdapter.js
@@ -302,6 +302,10 @@ export function mergeArrays(hashFn, ...args) {
   return merged;
 }
 
+export function documentFocus(doc) {
+  return typeof doc.hasFocus === 'function' ? +doc.hasFocus() : undefined;
+}
+
 const spec = {
   code: 'vi',
   supportedMediaTypes: [mediaTypes.VIDEO, mediaTypes.BANNER],
@@ -373,10 +377,7 @@ const spec = {
             };
           }
         ),
-        focus:
-          typeof document.hasFocus === 'function'
-            ? +document.hasFocus()
-            : undefined
+        focus: documentFocus(document)
       },
       options: {
         contentType: 'application/json',
diff --git a/test/spec/modules/viBidAdapter_spec.js b/test/spec/modules/viBidAdapter_spec.js
index b12d534ff024..8f1c07047ec9 100644
--- a/test/spec/modules/viBidAdapter_spec.js
+++ b/test/spec/modules/viBidAdapter_spec.js
@@ -23,7 +23,8 @@ import {
   area,
   get,
   getViewabilityDescription,
-  mergeArrays
+  mergeArrays,
+  documentFocus
 } from 'modules/viBidAdapter';
 
 describe('ratioToPercentageCeil', () => {
@@ -892,3 +893,19 @@ describe('mergeSizes', () => {
     ).to.deep.equal([[1, 2], [2, 4], [400, 500], [500, 600]]);
   });
 });
+
+describe('documentFocus', () => {
+  it('calls hasFocus function if it present, converting boolean to an int 0/1 value, returns undefined otherwise', () => {
+    expect(
+      documentFocus({
+        hasFocus: () => true
+      })
+    ).to.equal(1);
+    expect(
+      documentFocus({
+        hasFocus: () => false
+      })
+    ).to.equal(0);
+    expect(documentFocus({})).to.be.undefined;
+  });
+});