From 21a6c51a069632bb39bc0d7c4eb6ff1a71284425 Mon Sep 17 00:00:00 2001
From: Zaahir Moolla <moollaza@duckduckgo.com>
Date: Fri, 20 Oct 2023 15:49:10 -0400
Subject: [PATCH] Remove Chrome Counteract Exp code

---
 integration-test/atb.spec.js |  3 +--
 shared/js/background/atb.js  | 18 ------------------
 unit-test/background/atb.js  |  8 ++++----
 3 files changed, 5 insertions(+), 24 deletions(-)

diff --git a/integration-test/atb.spec.js b/integration-test/atb.spec.js
index 39c4f761be..b4e29d9686 100644
--- a/integration-test/atb.spec.js
+++ b/integration-test/atb.spec.js
@@ -63,10 +63,9 @@ test.describe('install workflow', () => {
             const atb = await backgroundPage.evaluate(() => globalThis.dbg.settings.getSetting('atb'))
             const setAtb = await backgroundPage.evaluate(() => globalThis.dbg.settings.getSetting('set_atb'))
             const extiSent = await backgroundPage.evaluate(() => globalThis.dbg.settings.getSetting('extiSent'))
-            const atbPattern = new RegExp('^' + mockAtb.version + '(vk|vj)?$')
 
             // check the extension's internal state is correct
-            expect(atb).toMatch(atbPattern)
+            expect(atb).toEqual(mockAtb.version)
             expect(setAtb).toEqual(atb)
             expect(extiSent).toBeTruthy()
 
diff --git a/shared/js/background/atb.js b/shared/js/background/atb.js
index 0fb9cac3d1..12844b1e4a 100644
--- a/shared/js/background/atb.js
+++ b/shared/js/background/atb.js
@@ -3,10 +3,8 @@
  * Please see https://duck.co/help/privacy/atb for more information.
  */
 import browser from 'webextension-polyfill'
-import { getUserLocale } from './i18n.js'
 
 const settings = require('./settings')
-const utils = require('./utils')
 const parseUserAgentString = require('../shared-utils/parse-user-agent-string')
 const load = require('./load')
 const browserWrapper = require('./wrapper')
@@ -159,14 +157,7 @@ const ATB = (() => {
             return new URLSearchParams()
         },
 
-        getChromeCounteractExpATB: (atb) => {
-            const variant = 'v'
-            const atbVariant = Math.random() < 0.5 ? 'k' : 'j'
-            return `${atb}${variant}${atbVariant}`
-        },
-
         updateATBValues: () => {
-            const browserInfo = parseUserAgentString()
             // wait until settings is ready to try and get atb from the page
             return settings.ready()
                 .then(ATB.setInitialVersions)
@@ -180,15 +171,6 @@ const ATB = (() => {
                         return !!atb
                     })
 
-                    // in case there is no assigned atb variant, enroll into Chrome Counteract experiment
-                    if (!atb &&
-                        settings.getSetting('atb') &&
-                        utils.getBrowserName() === 'chrome' &&
-                        getUserLocale() === 'en' &&
-                        browserInfo.os !== 'l') {
-                        atb = ATB.getChromeCounteractExpATB(settings.getSetting('atb'))
-                    }
-
                     if (atb) {
                         settings.updateSetting('atb', atb)
                     }
diff --git a/unit-test/background/atb.js b/unit-test/background/atb.js
index 4a15b1845a..2c4d54e0d9 100644
--- a/unit-test/background/atb.js
+++ b/unit-test/background/atb.js
@@ -254,8 +254,8 @@ describe('complex install workflow cases', () => {
         return atb.updateATBValues()
             .then(() => {
                 validateExtiWasHit('v112-2')
-                expect(settings.getSetting('atb')).toMatch(/v112-2(v[jk])?/)
-                expect(settings.getSetting('set_atb')).toMatch(/v112-2(v[jk])?/)
+                expect(settings.getSetting('atb')).toEqual('v112-2')
+                expect(settings.getSetting('set_atb')).toEqual('v112-2')
             })
     })
     it('should handle the install process correctly if there\'s DDG pages open that pass an ATB param', () => {
@@ -282,8 +282,8 @@ describe('complex install workflow cases', () => {
         return atb.updateATBValues()
             .then(() => {
                 validateExtiWasHit('v112-2')
-                expect(settings.getSetting('atb')).toMatch(/v112-2(v[jk])?/)
-                expect(settings.getSetting('set_atb')).toMatch(/v112-2(v[jk])?/)
+                expect(settings.getSetting('atb')).toEqual('v112-2')
+                expect(settings.getSetting('set_atb')).toEqual('v112-2')
             })
     })
 })