From 535ea0d813e549d0c5fce997e8db9d19b0f8d57b Mon Sep 17 00:00:00 2001
From: Dmitry Fedotov <d.fedotov@mairdumont-netletix.com>
Date: Thu, 18 Oct 2018 12:32:08 +0200
Subject: [PATCH 1/2] Fixes #3197 - call auctionDone() when 'No valid bid
 requests returned for auction'

---
 src/auction.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/auction.js b/src/auction.js
index 50b681d61a8..61c403e7ff5 100644
--- a/src/auction.js
+++ b/src/auction.js
@@ -196,6 +196,7 @@ export function newAuction({adUnits, adUnitCodes, callback, cbTimeout, labels})
 
     if (bidRequests.length < 1) {
       utils.logWarn('No valid bid requests returned for auction');
+      auctionDone();
     } else {
       let call = {
         bidRequests,

From 83228f7afe309add7cc9aad06b2af80f312e7fc0 Mon Sep 17 00:00:00 2001
From: Dmitry Fedotov <d.fedotov@mairdumont-netletix.com>
Date: Tue, 23 Oct 2018 10:30:57 +0200
Subject: [PATCH 2/2] #3197 Added unit test to check if callback is called when
 bidRequests is empty

---
 test/spec/unit/pbjs_api_spec.js | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/test/spec/unit/pbjs_api_spec.js b/test/spec/unit/pbjs_api_spec.js
index 61e26891bac..a03339c76b3 100644
--- a/test/spec/unit/pbjs_api_spec.js
+++ b/test/spec/unit/pbjs_api_spec.js
@@ -1193,6 +1193,39 @@ describe('Unit: Prebid Module', function () {
     });
   })
 
+  describe('requestBids', function () {
+    let sandbox;
+    beforeEach(function () {
+      sandbox = sinon.sandbox.create();
+    });
+    afterEach(function () {
+      sandbox.restore();
+    });
+    describe('bidRequests is empty', function () {
+      it('should log warning message and execute callback if bidRequests is empty', function () {
+        let bidsBackHandler = function bidsBackHandlerCallback() {};
+        let spyExecuteCallback = sinon.spy(bidsBackHandler);
+        let logWarnSpy = sandbox.spy(utils, 'logWarn');
+
+        $$PREBID_GLOBAL$$.requestBids({
+          adUnits: [
+            {
+              code: 'test1',
+              bids: [],
+            }, {
+              code: 'test2',
+              bids: [],
+            }
+          ],
+          bidsBackHandler: spyExecuteCallback
+        });
+
+        assert.ok(logWarnSpy.calledWith('No valid bid requests returned for auction'), 'expected warning message was logged');
+        assert.ok(spyExecuteCallback.calledOnce, 'callback executed when bidRequests is empty');
+      });
+    });
+  });
+
   describe('requestBids', function () {
     let xhr;
     let requests;