Add unit test

(cherry picked from commit 946710f)
prebid · Nov 1, 2019 · 5c63821 · 5c63821
1 parent c36ee5d
commit 5c63821
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Showing 2 changed files with 23 additions and 5 deletions.
diff --git 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
@@ -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;
+  });
+});