From 08bb298b9b0d88c35a14595f1d891c11eeca0386 Mon Sep 17 00:00:00 2001
From: Baptiste HAUDEGAND <baptiste.haudegand@gmail.com>
Date: Fri, 2 Oct 2020 14:40:50 +0200
Subject: [PATCH] Debug timeToFirstByte unit test

---
 test/spec/modules/teadsBidAdapter_spec.js | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/test/spec/modules/teadsBidAdapter_spec.js b/test/spec/modules/teadsBidAdapter_spec.js
index 17841b271d4..d106258518c 100644
--- a/test/spec/modules/teadsBidAdapter_spec.js
+++ b/test/spec/modules/teadsBidAdapter_spec.js
@@ -211,9 +211,15 @@ describe('teadsBidAdapter', () => {
       if (ttfbExpectedV2) {
         expect(payload.timeToFirstByte).to.deep.equal(ttfbExpectedV2.toString());
       } else {
-        const ttfbExpectedV1 = performance.timing.responseStart - performance.timing.requestStart;
-
-        expect(payload.timeToFirstByte).to.deep.equal(ttfbExpectedV1.toString());
+        const ttfbWithTimingV1 = performance &&
+            performance.timing.responseStart &&
+            performance.timing.requestStart &&
+            performance.timing.responseStart >= 0 &&
+            performance.timing.requestStart >= 0 &&
+            performance.timing.responseStart - performance.timing.requestStart;
+        const ttfbExpectedV1 = ttfbWithTimingV1 ? ttfbWithTimingV1.toString() : '';
+
+        expect(payload.timeToFirstByte).to.deep.equal(ttfbExpectedV1);
       }
     });