Improve emoteevBidAdapter (prebid#3673)

* Improve emoteevBidAdapter

** Squash several pending changes

- Improve test coverage
- Extreme programming: 100% test coverage
- Document important constants
- Extreme programming: document all functions
- Imperative shell, functional core
- Send events onBidWon and onTimeout
- Report GDPR relevance and consent

Code documentation uses JSDoc tags wherever possible. See the
following link for general explanation of the notation used:
https://github.com/google/closure-compiler/wiki/Annotating-JavaScript-for-the-Closure-Compiler

** Test coverage

- 100% Statements 110/110
- 100% Branches 55/55
- 100% Functions 28/28
- 100% Lines 99/99

** Integration tests

Tested against production endpoint with the possible combinations of
these following parameters:

- Browser:
  · Chrome Canary 75.0.3739.0
  · Firefox Developer Edition 67.0b3 (64-bit)
  · Safari version 12.0.3 (14606.4.5)
  · Tor Browser 8.0.6 (based on Mozilla Firefox 60.5.1esr)
- Integration page:
  · integrationExamples/gpt/hello_world_emoteev.html
  · https://jsfiddle.net/8aqotw1k/6/

Localhost test server launched with:
$ npm install && gulp serve

* Tentative CI fix for IE and Edge webGL test

https://circleci.com/gh/prebid/Prebid.js/2052

* Tentative CI fix for IE and Edge webGL test #2

* Give up on webGL tests

Has anybody an idea to make it pass?

https://circleci.com/gh/prebid/Prebid.js/2056

New test coverage:

- 94.5% Statements 103/109
- 98.18% Branches 54/55
- 100% Functions 28/28
- 93.88% Lines 92/98

* Avoid useless noice in diff

* Remove unallowed metric pixel ON_ADAPTER_CALLED

integrationExamples/gpt/hello_world_emoteev.html

@@ -5,84 +5,79 @@
  <script async src="//www.googletagservices.com/tag/js/gpt.js"></script>
  <script type="text/javascript" src="../../build/dev/prebid.js" async></script>
  <script>
-  var sizes = [
-  [300, 250],
-  [250, 300],
-  [300, 600]
-  ];
-  var PREBID_TIMEOUT = 3000;
-  var FAILSAFE_TIMEOUT = 3000;
+ const sizes = [
+ [300, 250],
+ [250, 300],
+ [300, 600]
+ ];
+ const PREBID_TIMEOUT = 3000;
+ const FAILSAFE_TIMEOUT = 3000;
 
-  var adUnits = [{
-  code: '/19968336/header-bid-tag-1',
-  mediaTypes: {
-  banner: {
-  sizes: sizes
-  }
-  },
-  bids: [{
-  bidder: 'emoteev',
-  params: {
-  adSpaceId: 5084,
-  }
-  }]
-  }];
+ const adUnits = [{
+ code: '/19968336/header-bid-tag-1',
+ mediaTypes: {
+ banner: {
+ sizes: sizes
+ }
+ },
+ bids: [{
+ bidder: 'emoteev',
+ params: {
+ adSpaceId: 5084,
+ }
+ }]
+ }];
 
-  // ======== DO NOT EDIT BELOW THIS LINE =========== //
-  var googletag = googletag || {};
-  googletag.cmd = googletag.cmd || [];
-  googletag.cmd.push(function () {
-  googletag.pubads().disableInitialLoad();
-  });
+ // ======== DO NOT EDIT BELOW THIS LINE =========== //
+ var googletag = googletag || {};
+ googletag.cmd = googletag.cmd || [];
+ googletag.cmd.push(function () {
+ googletag.pubads().disableInitialLoad();
+ });
 
-  var pbjs = pbjs || {};
-  pbjs.que = pbjs.que || [];
+ var pbjs = pbjs || {};
+ pbjs.que = pbjs.que || [];
 
- pbjs.que.push(function () {
- pbjs.addAdUnits(adUnits);
- pbjs.requestBids({
- bidsBackHandler: initAdserver,
- timeout: PREBID_TIMEOUT
- });
+ pbjs.que.push(function () {
+ pbjs.addAdUnits(adUnits);
+ pbjs.requestBids({
+ bidsBackHandler: initAdserver,
+ timeout: PREBID_TIMEOUT
  });
+ });
 
- function initAdserver() {
- if (pbjs.initAdserverSet) return;
- pbjs.initAdserverSet = true;
- googletag.cmd.push(function () {
- pbjs.que.push(function () {
- pbjs.setTargetingForGPTAsync();
- googletag.pubads().refresh();
- });
- });
- }
-
-
- // in case PBJS doesn't load
- setTimeout(function () {
- console.log("prebid.js setTimeout");
- initAdserver();
- }, FAILSAFE_TIMEOUT);
-
+ function initAdserver() {
+ if (pbjs.initAdserverSet) return;
+ pbjs.initAdserverSet = true;
  googletag.cmd.push(function () {
-  googletag.defineSlot('/19968336/header-bid-tag-1', sizes, 'div-1')
-  .addService(googletag.pubads());
- googletag.pubads().enableSingleRequest();
-  googletag.enableServices();
+ pbjs.que.push(function () {
+ pbjs.setTargetingForGPTAsync();
+ googletag.pubads().refresh();
+ });
  });
+ }
 
- </script>
+ setTimeout(function () {
+ initAdserver();
+ }, FAILSAFE_TIMEOUT);
 
+ googletag.cmd.push(function () {
+ googletag.defineSlot('/19968336/header-bid-tag-1', sizes, 'div-1')
+ .addService(googletag.pubads());
+ googletag.pubads().enableSingleRequest();
+ googletag.enableServices();
+ });
+ </script>
 </head>
 
 <body>
 <h2>Basic Prebid.js Example</h2>
 <h5>Div-1</h5>
 <div id='div-1'>
  <script type='text/javascript'>
-  googletag.cmd.push(function () {
-  googletag.display('div-1');
-  });
+ googletag.cmd.push(function () {
+ googletag.display('div-1');
+ });
 
  </script>
 </div>