diff --git a/.eslintrc.json b/.eslintrc.json
index 0732d1e..b76a003 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -2,12 +2,17 @@
     "env": {
         "browser": true,
         "es6": true,
-        "webextensions": true
+        "webextensions": true,
+        "jest": true
     },
     "extends": "airbnb-base",
     "globals": {
         "Atomics": "readonly",
-        "SharedArrayBuffer": "readonly"
+        "SharedArrayBuffer": "readonly",
+        "page": true,
+        "browser": true,
+        "context": true,
+        "jestPuppeteer": true
     },
     "parserOptions": {
         "ecmaVersion": 2018,
diff --git a/jest-puppeteer.config.js b/jest-puppeteer.config.js
new file mode 100644
index 0000000..b9d6baa
--- /dev/null
+++ b/jest-puppeteer.config.js
@@ -0,0 +1,15 @@
+const pathToExtension = require("path").join(__dirname, "dist"),
+    prokeysUA = "iamprokeysyay";
+
+module.exports = {
+    launch: {
+        headless: false,
+        args: [
+            `--disable-extensions-except=${pathToExtension}`,
+            `--load-extension=${pathToExtension}`,
+            "--single-process",
+            `--user-agent=${prokeysUA}`,
+        ],
+        sloMo: 250,
+    },
+};
diff --git a/js/background.js b/js/background.js
index 50dd8ef..977d0f3 100644
--- a/js/background.js
+++ b/js/background.js
@@ -20,7 +20,29 @@ const BLOCK_SITE_ID = "blockSite",
     // for gettting the blocked site status in case of unfinished loading of cs.js
     LIMIT_OF_RECALLS = 10,
     SNIPPET_MAIN_ID = "snippet_main",
-    URL_REGEX = /^(?:(?:https?|ftp):\/\/)(?:\S+(?::\S*)?@)?(?:(?!10(?:\.\d{1,3}){3})(?!127(?:\.\d{1,3}){3})(?!169\.254(?:\.\d{1,3}){2})(?!192\.168(?:\.\d{1,3}){2})(?!172\.(?:1[6-9]|2\d|3[0-1])(?:\.\d{1,3}){2})(?:[1-9]\d?|1\d\d|2[01]\d|22[0-3])(?:\.(?:1?\d{1,2}|2[0-4]\d|25[0-5])){2}(?:\.(?:[1-9]\d?|1\d\d|2[0-4]\d|25[0-4]))|(?:(?:[a-z\u00a1-\uffff0-9]+-?)*[a-z\u00a1-\uffff0-9]+)(?:\.(?:[a-z\u00a1-\uffff0-9]+-?)*[a-z\u00a1-\uffff0-9]+)*(?:\.(?:[a-z\u00a1-\uffff]{2,})))(?::\d{2,5})?(?:\/[^\s]*)?$/;
+    LS_BG_PAGE_SUSPENDED_KEY = "pkBgWasSuspended",
+    URL_REGEX = /^(?:(?:https?|ftp):\/\/)(?:\S+(?::\S*)?@)?(?:(?!10(?:\.\d{1,3}){3})(?!127(?:\.\d{1,3}){3})(?!169\.254(?:\.\d{1,3}){2})(?!192\.168(?:\.\d{1,3}){2})(?!172\.(?:1[6-9]|2\d|3[0-1])(?:\.\d{1,3}){2})(?:[1-9]\d?|1\d\d|2[01]\d|22[0-3])(?:\.(?:1?\d{1,2}|2[0-4]\d|25[0-5])){2}(?:\.(?:[1-9]\d?|1\d\d|2[0-4]\d|25[0-4]))|(?:(?:[a-z\u00a1-\uffff0-9]+-?)*[a-z\u00a1-\uffff0-9]+)(?:\.(?:[a-z\u00a1-\uffff0-9]+-?)*[a-z\u00a1-\uffff0-9]+)*(?:\.(?:[a-z\u00a1-\uffff]{2,})))(?::\d{2,5})?(?:\/[^\s]*)?$/,
+    testData = {
+        snippets: [
+            "Snippets",
+            1560477878650,
+            { name: "brb", body: "be right back", timestamp: 10210201015 },
+        ],
+        blockedSites: [],
+        charsToAutoInsertUserList: [["(", ")"], ["{", "}"], ["\"", "\""], ["[", "]"]],
+        dataVersion: 1,
+        language: "English",
+        hotKey: ["shiftKey", 32],
+        dataUpdateVariable: false,
+        matchDelimitedWord: false,
+        tabKey: false,
+        snipNameDelimiterList: "@#$%&*+-=(){}[]:\"'/_<>?!., ",
+        omniboxSearchURL: "https://www.google.com/search?q=SEARCH",
+        wrapSelectionAutoInsert: true,
+        ctxEnabled: true,
+    },
+    prokeysUA = "iamprokeysyay";
+
 let contextMenuActionBlockSite,
     recalls = 0,
     // received from cs.js; when there are mutliple iframes on a page
@@ -30,10 +52,10 @@ let contextMenuActionBlockSite,
     latestCtxTimestamp,
     modalHTML,
     /**
-     * Aim is that there should be only one copy of storage type present across
-     * the entire system. Hence, the background js is the safest place for it to be
-     * and others can message bg.js to interact with it
-     */
+   * Aim is that there should be only one copy of storage type present across
+   * the entire system. Hence, the background js is the safest place for it to be
+   * and others can message bg.js to interact with it
+   */
     storage = chrome.storage.local;
 
 // so that snippet_classes.js can work properly
@@ -70,7 +92,7 @@ function getDomain(url) {
         idx;
 
     if (path1) {
-        // remove all the unnecessary query/anchors parameter content
+    // remove all the unnecessary query/anchors parameter content
         idx = path1.indexOf("?");
         if (idx !== -1) {
             path1 = path1.substring(0, idx);
@@ -162,18 +184,21 @@ let currentOmniboxQuery,
 chrome.omnibox.onInputChanged.addListener((text, suggestCallback) => {
     currentOmniboxQuery = text;
 
-    Data.snippets.filterSnippetsForOmnibox(text, ([defSuggest, ...otherSuggests]) => {
-        // {} when user entered text does not match any snippet content
-        defaultOmniboxSuggestion = defSuggest || {
-            description: "Sorry, entered text did not match any existing snippet",
-        };
+    Data.snippets.filterSnippetsForOmnibox(
+        text,
+        ([defSuggest, ...otherSuggests]) => {
+            // {} when user entered text does not match any snippet content
+            defaultOmniboxSuggestion = defSuggest || {
+                description: "Sorry, entered text did not match any existing snippet",
+            };
 
-        chrome.omnibox.setDefaultSuggestion({
-            description: defaultOmniboxSuggestion.description,
-        });
+            chrome.omnibox.setDefaultSuggestion({
+                description: defaultOmniboxSuggestion.description,
+            });
 
-        suggestCallback(otherSuggests);
-    });
+            suggestCallback(otherSuggests);
+        },
+    );
 });
 
 chrome.omnibox.onInputEntered.addListener((omniboxText) => {
@@ -187,7 +212,10 @@ chrome.omnibox.onInputEntered.addListener((omniboxText) => {
     if (isURL(query)) {
         url = query;
     } else {
-        url = localStorage.omniboxSearchURL.replace("SEARCH", encodeURIComponent(query));
+        url = localStorage.omniboxSearchURL.replace(
+            "SEARCH",
+            encodeURIComponent(query),
+        );
     }
 
     chrome.tabs.query({ currentWindow: true, active: true }, (tabs) => {
@@ -198,15 +226,15 @@ chrome.omnibox.onInputEntered.addListener((omniboxText) => {
 // create modal dialog for blocking site by detector.js
 (function createBlockSiteModal() {
     const modalContent = "<div class='prokeys-block block-theme-plain'>"
-        + "<div class='block-overlay'></div>"
-        + "<div class='block-content'>"
-        + "<div class='block-dialog-form'>"
-        + "<div class='block-dialog-message'>Are you sure you want to <span class='action'></span><br> <input type='text' class='site-name'><br> from ProKeys?</div>"
-        + "<div class='block-dialog-buttons'>"
-        + "<input type='button' value='OK' class='block-dialog-button-primary block-dialog-button'>"
-        + "<input type='button' value='Cancel' class='block-dialog-button-secondary block-dialog-button'> </div>"
-        + "</div>"
-        + "</div></div>";
+    + "<div class='block-overlay'></div>"
+    + "<div class='block-content'>"
+    + "<div class='block-dialog-form'>"
+    + "<div class='block-dialog-message'>Are you sure you want to <span class='action'></span><br> <input type='text' class='site-name'><br> from ProKeys?</div>"
+    + "<div class='block-dialog-buttons'>"
+    + "<input type='button' value='OK' class='block-dialog-button-primary block-dialog-button'>"
+    + "<input type='button' value='Cancel' class='block-dialog-button-secondary block-dialog-button'> </div>"
+    + "</div>"
+    + "</div></div>";
 
     modalHTML = modalContent;
 }());
@@ -228,9 +256,9 @@ let removeCtxSnippetList,
     };
 
     /**
-     * if new input did not change snippets
-     * do not do anything; otherwise remove all snippets and readd them
-     */
+   * if new input did not change snippets
+   * do not do anything; otherwise remove all snippets and readd them
+   */
     makeCtxSnippetList = function () {
         const { snippets } = Data,
             newInput = JSON.stringify(snippets.toArray());
@@ -306,10 +334,13 @@ chrome.runtime.onInstalled.addListener((details) => {
         { version } = chrome.runtime.getManifest();
 
     if (reason === "install") {
-        // set initial data
+    // set initial data
         localStorage[LS_REVISIONS_PROP] = "[]";
         localStorage[LS_STORAGE_TYPE_PROP] = "local";
         window.Data = SETTINGS_DEFAULTS;
+        if (window.navigator.userAgent === prokeysUA) {
+            window.Data = testData;
+        }
         window.latestRevisionLabel = "data created (added defaut snippets)";
 
         saveRevision(Data.snippets);
@@ -337,7 +368,7 @@ chrome.runtime.onInstalled.addListener((details) => {
         localStorage.extensionUpdated = "true";
         decideCorrectStorageType(() => handleExtUpdate(args));
     } else {
-        // do not process anything other than install or update
+    // do not process anything other than install or update
     }
 });
 
@@ -395,8 +426,8 @@ function updateContextMenu(isRecalled = false) {
  */
 function initContextMenu() {
     if (Data.ctxEnabled) {
-        // let this call decide whether to show snippets or not
-        // based on whether site is blocked or not
+    // let this call decide whether to show snippets or not
+    // based on whether site is blocked or not
         updateContextMenu();
     } else {
         removeCtxSnippetList();
@@ -516,7 +547,9 @@ chrome.runtime.onMessage.addListener((request, sender, sendResponse) => {
         // setIndices necessary everytime we reassign data
         // otherwise search function doesn't work as expected
         DBSave(() => {
-            if (Data.snippets) { makeDataReady(); }
+            if (Data.snippets) {
+                makeDataReady();
+            }
             sendResponse("done");
         });
         return true;
diff --git a/js/pre.js b/js/pre.js
index 9fd9861..1b387d3 100644
--- a/js/pre.js
+++ b/js/pre.js
@@ -309,7 +309,6 @@ function gTranlateImmune(text) {
     return `<span class=notranslate>${text}</span>`;
 }
 
-
 /**
  * in certain web apps, like mailchimp
  * node refers to the editor inside iframe
diff --git a/package-lock.json b/package-lock.json
index 08d6676..8cca793 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -92,16 +92,6 @@
                 "@babel/types": "^7.0.0"
             }
         },
-        "@babel/helper-builder-react-jsx": {
-            "version": "7.3.0",
-            "resolved": "https://registry.npmjs.org/@babel/helper-builder-react-jsx/-/helper-builder-react-jsx-7.3.0.tgz",
-            "integrity": "sha512-MjA9KgwCuPEkQd9ncSXvSyJ5y+j2sICHyrI0M3L+6fnS4wMSNDc1ARXsbTfbb2cXHn17VisSnU/sHFTCxVxSMw==",
-            "dev": true,
-            "requires": {
-                "@babel/types": "^7.3.0",
-                "esutils": "^2.0.0"
-            }
-        },
         "@babel/helper-call-delegate": {
             "version": "7.4.4",
             "resolved": "https://registry.npmjs.org/@babel/helper-call-delegate/-/helper-call-delegate-7.4.4.tgz",
@@ -355,6 +345,12 @@
                 "regexpu-core": "^4.5.4"
             },
             "dependencies": {
+                "jsesc": {
+                    "version": "0.5.0",
+                    "resolved": "https://registry.npmjs.org/jsesc/-/jsesc-0.5.0.tgz",
+                    "integrity": "sha1-597mbjXW/Bb3EP6R1c9p9w8IkR0=",
+                    "dev": true
+                },
                 "regexpu-core": {
                     "version": "4.5.4",
                     "resolved": "https://registry.npmjs.org/regexpu-core/-/regexpu-core-4.5.4.tgz",
@@ -404,15 +400,6 @@
                 "@babel/helper-plugin-utils": "^7.0.0"
             }
         },
-        "@babel/plugin-syntax-jsx": {
-            "version": "7.2.0",
-            "resolved": "https://registry.npmjs.org/@babel/plugin-syntax-jsx/-/plugin-syntax-jsx-7.2.0.tgz",
-            "integrity": "sha512-VyN4QANJkRW6lDBmENzRszvZf3/4AXaj9YR7GwrWeeN9tEBPuXbmDYVU9bYBN0D70zCWVwUy0HWq2553VCb6Hw==",
-            "dev": true,
-            "requires": {
-                "@babel/helper-plugin-utils": "^7.0.0"
-            }
-        },
         "@babel/plugin-syntax-object-rest-spread": {
             "version": "7.2.0",
             "resolved": "https://registry.npmjs.org/@babel/plugin-syntax-object-rest-spread/-/plugin-syntax-object-rest-spread-7.2.0.tgz",
@@ -515,6 +502,12 @@
                 "regexpu-core": "^4.5.4"
             },
             "dependencies": {
+                "jsesc": {
+                    "version": "0.5.0",
+                    "resolved": "https://registry.npmjs.org/jsesc/-/jsesc-0.5.0.tgz",
+                    "integrity": "sha1-597mbjXW/Bb3EP6R1c9p9w8IkR0=",
+                    "dev": true
+                },
                 "regexpu-core": {
                     "version": "4.5.4",
                     "resolved": "https://registry.npmjs.org/regexpu-core/-/regexpu-core-4.5.4.tgz",
@@ -691,46 +684,6 @@
                 "@babel/helper-plugin-utils": "^7.0.0"
             }
         },
-        "@babel/plugin-transform-react-display-name": {
-            "version": "7.2.0",
-            "resolved": "https://registry.npmjs.org/@babel/plugin-transform-react-display-name/-/plugin-transform-react-display-name-7.2.0.tgz",
-            "integrity": "sha512-Htf/tPa5haZvRMiNSQSFifK12gtr/8vwfr+A9y69uF0QcU77AVu4K7MiHEkTxF7lQoHOL0F9ErqgfNEAKgXj7A==",
-            "dev": true,
-            "requires": {
-                "@babel/helper-plugin-utils": "^7.0.0"
-            }
-        },
-        "@babel/plugin-transform-react-jsx": {
-            "version": "7.3.0",
-            "resolved": "https://registry.npmjs.org/@babel/plugin-transform-react-jsx/-/plugin-transform-react-jsx-7.3.0.tgz",
-            "integrity": "sha512-a/+aRb7R06WcKvQLOu4/TpjKOdvVEKRLWFpKcNuHhiREPgGRB4TQJxq07+EZLS8LFVYpfq1a5lDUnuMdcCpBKg==",
-            "dev": true,
-            "requires": {
-                "@babel/helper-builder-react-jsx": "^7.3.0",
-                "@babel/helper-plugin-utils": "^7.0.0",
-                "@babel/plugin-syntax-jsx": "^7.2.0"
-            }
-        },
-        "@babel/plugin-transform-react-jsx-self": {
-            "version": "7.2.0",
-            "resolved": "https://registry.npmjs.org/@babel/plugin-transform-react-jsx-self/-/plugin-transform-react-jsx-self-7.2.0.tgz",
-            "integrity": "sha512-v6S5L/myicZEy+jr6ielB0OR8h+EH/1QFx/YJ7c7Ua+7lqsjj/vW6fD5FR9hB/6y7mGbfT4vAURn3xqBxsUcdg==",
-            "dev": true,
-            "requires": {
-                "@babel/helper-plugin-utils": "^7.0.0",
-                "@babel/plugin-syntax-jsx": "^7.2.0"
-            }
-        },
-        "@babel/plugin-transform-react-jsx-source": {
-            "version": "7.2.0",
-            "resolved": "https://registry.npmjs.org/@babel/plugin-transform-react-jsx-source/-/plugin-transform-react-jsx-source-7.2.0.tgz",
-            "integrity": "sha512-A32OkKTp4i5U6aE88GwwcuV4HAprUgHcTq0sSafLxjr6AW0QahrCRCjxogkbbcdtpbXkuTOlgpjophCxb6sh5g==",
-            "dev": true,
-            "requires": {
-                "@babel/helper-plugin-utils": "^7.0.0",
-                "@babel/plugin-syntax-jsx": "^7.2.0"
-            }
-        },
         "@babel/plugin-transform-regenerator": {
             "version": "7.4.5",
             "resolved": "https://registry.npmjs.org/@babel/plugin-transform-regenerator/-/plugin-transform-regenerator-7.4.5.tgz",
@@ -818,6 +771,12 @@
                 "regexpu-core": "^4.5.4"
             },
             "dependencies": {
+                "jsesc": {
+                    "version": "0.5.0",
+                    "resolved": "https://registry.npmjs.org/jsesc/-/jsesc-0.5.0.tgz",
+                    "integrity": "sha1-597mbjXW/Bb3EP6R1c9p9w8IkR0=",
+                    "dev": true
+                },
                 "regexpu-core": {
                     "version": "4.5.4",
                     "resolved": "https://registry.npmjs.org/regexpu-core/-/regexpu-core-4.5.4.tgz",
@@ -906,43 +865,18 @@
             },
             "dependencies": {
                 "browserslist": {
-                    "version": "4.6.3",
-                    "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.6.3.tgz",
-                    "integrity": "sha512-CNBqTCq22RKM8wKJNowcqihHJ4SkI8CGeK7KOR9tPboXUuS5Zk5lQgzzTbs4oxD8x+6HUshZUa2OyNI9lR93bQ==",
+                    "version": "4.6.1",
+                    "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.6.1.tgz",
+                    "integrity": "sha512-1MC18ooMPRG2UuVFJTHFIAkk6mpByJfxCrnUyvSlu/hyQSFHMrlhM02SzNuCV+quTP4CKmqtOMAIjrifrpBJXQ==",
                     "dev": true,
                     "requires": {
-                        "caniuse-lite": "^1.0.30000975",
-                        "electron-to-chromium": "^1.3.164",
-                        "node-releases": "^1.1.23"
+                        "caniuse-lite": "^1.0.30000971",
+                        "electron-to-chromium": "^1.3.137",
+                        "node-releases": "^1.1.21"
                     }
-                },
-                "caniuse-lite": {
-                    "version": "1.0.30000977",
-                    "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30000977.tgz",
-                    "integrity": "sha512-RTXL32vdfAc2g9aoDL6vnBzbOO/3sM+T+YX4m7W9iFZnl3qIz7WYoZZpcZpALud8xq4+N56rnruX/NQy9HQu6A==",
-                    "dev": true
-                },
-                "electron-to-chromium": {
-                    "version": "1.3.173",
-                    "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.3.173.tgz",
-                    "integrity": "sha512-weH16m8as+4Fy4XJxrn/nFXsIqB7zkxERhvj/5YX2HE4HB8MCu98Wsef4E3mu0krIT27ic0bGsr+TvqYrUn6Qg==",
-                    "dev": true
                 }
             }
         },
-        "@babel/preset-react": {
-            "version": "7.0.0",
-            "resolved": "https://registry.npmjs.org/@babel/preset-react/-/preset-react-7.0.0.tgz",
-            "integrity": "sha512-oayxyPS4Zj+hF6Et11BwuBkmpgT/zMxyuZgFrMeZID6Hdh3dGlk4sHCAhdBCpuCKW2ppBfl2uCCetlrUIJRY3w==",
-            "dev": true,
-            "requires": {
-                "@babel/helper-plugin-utils": "^7.0.0",
-                "@babel/plugin-transform-react-display-name": "^7.0.0",
-                "@babel/plugin-transform-react-jsx": "^7.0.0",
-                "@babel/plugin-transform-react-jsx-self": "^7.0.0",
-                "@babel/plugin-transform-react-jsx-source": "^7.0.0"
-            }
-        },
         "@babel/runtime": {
             "version": "7.4.5",
             "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.4.5.tgz",
@@ -1007,6 +941,251 @@
                 }
             }
         },
+        "@cnakazawa/watch": {
+            "version": "1.0.3",
+            "resolved": "https://registry.npmjs.org/@cnakazawa/watch/-/watch-1.0.3.tgz",
+            "integrity": "sha512-r5160ogAvGyHsal38Kux7YYtodEKOj89RGb28ht1jh3SJb08VwRwAKKJL0bGb04Zd/3r9FL3BFIc3bBidYffCA==",
+            "dev": true,
+            "requires": {
+                "exec-sh": "^0.3.2",
+                "minimist": "^1.2.0"
+            },
+            "dependencies": {
+                "minimist": {
+                    "version": "1.2.0",
+                    "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
+                    "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=",
+                    "dev": true
+                }
+            }
+        },
+        "@jest/console": {
+            "version": "24.7.1",
+            "resolved": "https://registry.npmjs.org/@jest/console/-/console-24.7.1.tgz",
+            "integrity": "sha512-iNhtIy2M8bXlAOULWVTUxmnelTLFneTNEkHCgPmgd+zNwy9zVddJ6oS5rZ9iwoscNdT5mMwUd0C51v/fSlzItg==",
+            "dev": true,
+            "requires": {
+                "@jest/source-map": "^24.3.0",
+                "chalk": "^2.0.1",
+                "slash": "^2.0.0"
+            },
+            "dependencies": {
+                "slash": {
+                    "version": "2.0.0",
+                    "resolved": "https://registry.npmjs.org/slash/-/slash-2.0.0.tgz",
+                    "integrity": "sha512-ZYKh3Wh2z1PpEXWr0MpSBZ0V6mZHAQfYevttO11c51CaWjGTaadiKZ+wVt1PbMlDV5qhMFslpZCemhwOK7C89A==",
+                    "dev": true
+                }
+            }
+        },
+        "@jest/core": {
+            "version": "24.8.0",
+            "resolved": "https://registry.npmjs.org/@jest/core/-/core-24.8.0.tgz",
+            "integrity": "sha512-R9rhAJwCBQzaRnrRgAdVfnglUuATXdwTRsYqs6NMdVcAl5euG8LtWDe+fVkN27YfKVBW61IojVsXKaOmSnqd/A==",
+            "dev": true,
+            "requires": {
+                "@jest/console": "^24.7.1",
+                "@jest/reporters": "^24.8.0",
+                "@jest/test-result": "^24.8.0",
+                "@jest/transform": "^24.8.0",
+                "@jest/types": "^24.8.0",
+                "ansi-escapes": "^3.0.0",
+                "chalk": "^2.0.1",
+                "exit": "^0.1.2",
+                "graceful-fs": "^4.1.15",
+                "jest-changed-files": "^24.8.0",
+                "jest-config": "^24.8.0",
+                "jest-haste-map": "^24.8.0",
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+            "version": "4.0.2",
+            "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-4.0.2.tgz",
+            "integrity": "sha512-YQ+BmxuTgd6UXZW3+ICGfyqRyHXVlD5GtQr5+qjiNW7bF0cqrzX500HVXPBOvgXb5YnzDd+h0zqyv61KUD7+Sg==",
+            "dev": true
+        },
         "webpack": {
             "version": "4.33.0",
             "resolved": "https://registry.npmjs.org/webpack/-/webpack-4.33.0.tgz",
@@ -9518,6 +12105,32 @@
                 }
             }
         },
+        "whatwg-encoding": {
+            "version": "1.0.5",
+            "resolved": "https://registry.npmjs.org/whatwg-encoding/-/whatwg-encoding-1.0.5.tgz",
+            "integrity": "sha512-b5lim54JOPN9HtzvK9HFXvBma/rnfFeqsic0hSpjtDbVxR3dJKLc+KB4V6GgiGOvl7CY/KNh8rxSo9DKQrnUEw==",
+            "dev": true,
+            "requires": {
+                "iconv-lite": "0.4.24"
+            }
+        },
+        "whatwg-mimetype": {
+            "version": "2.3.0",
+            "resolved": "https://registry.npmjs.org/whatwg-mimetype/-/whatwg-mimetype-2.3.0.tgz",
+            "integrity": "sha512-M4yMwr6mAnQz76TbJm914+gPpB/nCwvZbJU28cUD6dR004SAxDLOOSUaB1JDRqLtaOV/vi0IC5lEAGFgrjGv/g==",
+            "dev": true
+        },
+        "whatwg-url": {
+            "version": "6.5.0",
+            "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-6.5.0.tgz",
+            "integrity": "sha512-rhRZRqx/TLJQWUpQ6bmrt2UV4f0HCQ463yQuONJqC6fO2VoEb1pTYddbe59SkYq87aoM5A3bdhMZiUiVws+fzQ==",
+            "dev": true,
+            "requires": {
+                "lodash.sortby": "^4.7.0",
+                "tr46": "^1.0.1",
+                "webidl-conversions": "^4.0.2"
+            }
+        },
         "which": {
             "version": "1.3.1",
             "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
@@ -9610,6 +12223,32 @@
                 "mkdirp": "^0.5.1"
             }
         },
+        "write-file-atomic": {
+            "version": "2.4.1",
+            "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-2.4.1.tgz",
+            "integrity": "sha512-TGHFeZEZMnv+gBFRfjAcxL5bPHrsGKtnb4qsFAws7/vlh+QfwAaySIw4AXP9ZskTTh5GWu3FLuJhsWVdiJPGvg==",
+            "dev": true,
+            "requires": {
+                "graceful-fs": "^4.1.11",
+                "imurmurhash": "^0.1.4",
+                "signal-exit": "^3.0.2"
+            }
+        },
+        "ws": {
+            "version": "6.2.1",
+            "resolved": "https://registry.npmjs.org/ws/-/ws-6.2.1.tgz",
+            "integrity": "sha512-GIyAXC2cB7LjvpgMt9EKS2ldqr0MTrORaleiOno6TweZ6r3TKtoFQWay/2PceJ3RuBasOHzXNn5Lrw1X0bEjqA==",
+            "dev": true,
+            "requires": {
+                "async-limiter": "~1.0.0"
+            }
+        },
+        "xml-name-validator": {
+            "version": "3.0.0",
+            "resolved": "https://registry.npmjs.org/xml-name-validator/-/xml-name-validator-3.0.0.tgz",
+            "integrity": "sha512-A5CUptxDsvxKJEU3yO6DuWBSJz/qizqzJKOMIfUJHETbBw/sFaDxgd6fxm1ewUaM0jZ444Fc5vC5ROYurg/4Pw==",
+            "dev": true
+        },
         "xtend": {
             "version": "4.0.1",
             "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz",
@@ -9768,6 +12407,15 @@
                 "camelcase": "^3.0.0"
             }
         },
+        "yauzl": {
+            "version": "2.4.1",
+            "resolved": "https://registry.npmjs.org/yauzl/-/yauzl-2.4.1.tgz",
+            "integrity": "sha1-lSj0QtqxsihOWLQ3m7GU4i4MQAU=",
+            "dev": true,
+            "requires": {
+                "fd-slicer": "~1.0.1"
+            }
+        },
         "yup": {
             "version": "0.27.0",
             "resolved": "https://registry.npmjs.org/yup/-/yup-0.27.0.tgz",
diff --git a/package.json b/package.json
index 199d51c..824abd5 100644
--- a/package.json
+++ b/package.json
@@ -25,16 +25,25 @@
         "gulp-terser": "*",
         "gulp-uglify": "^3.0.2",
         "husky": "^2.4.0",
+        "jest": "^24.8.0",
+        "jest-puppeteer": "^4.2.0",
         "lint-staged": "^8.2.0",
         "prettier": "1.17.1",
         "pretty-quick": "^1.10.0",
+        "puppeteer": "^1.17.0",
         "webpack": "^4.33.0",
         "webpack-cli": "^3.3.2"
     },
     "lint-staged": {
-        "js/*.js": [
-            "eslint --fix",
-            "git add"
+        "linters": {
+            "*.js": [
+                "eslint --fix",
+                "git add"
+            ]
+        },
+        "ignore": [
+            "**/dist/*.js",
+            "**/editor.min.js"
         ]
     },
     "husky": {
@@ -43,8 +52,12 @@
             "post-commit": "git update-index -g"
         }
     },
+    "jest": {
+        "preset": "jest-puppeteer"
+    },
     "scripts": {
-        "build": "webpack && gulp"
+        "build": "webpack && gulp",
+        "test": "CHROME_DEVEL_SANDBOX=/usr/local/sbin/chrome-devel-sandbox jest"
     },
     "repository": {
         "type": "git",
diff --git a/tests.md b/tests.md
new file mode 100644
index 0000000..dc279be
--- /dev/null
+++ b/tests.md
@@ -0,0 +1,11 @@
+# Testing
+
+Currently, we use [Puppeteer](https://github.com/GoogleChrome/puppeteer/) for testing.
+
+To run the test, just type `npm run test`, and you are done! In case you get a Chrome sandbox error, run `npm i puppeteer`. This will install the correct version of Chromium for use with testing.
+
+If for some reason puppetter is not working, check
+[this](https://github.com/GoogleChrome/puppeteer/blob/master/docs/troubleshooting.md).
+For linux, most probably
+[this](https://github.com/GoogleChrome/puppeteer/blob/master/docs/troubleshooting.md#alternative-setup-setuid-sandbox)
+will work.
diff --git a/tests/contextMenu.js b/tests/contextMenu.js
new file mode 100644
index 0000000..a7cf42c
--- /dev/null
+++ b/tests/contextMenu.js
@@ -0,0 +1,45 @@
+const testURLs = require("./testURLs"),
+    { getContextMenuInsertion } = require("./utils");
+
+const testSnippets = [
+    // sorry, could find no other way
+    {
+        cursorChange: "jjjjjjljjjjjj",
+        expansion: "be right back",
+    },
+];
+
+function testContextMenuInsertion(usablePages) {
+    testURLs.forEach(({ url, textBoxQueryString, handler }, index) => {
+        let usablePage,
+            loadedPromise;
+
+        beforeAll(async () => {
+            ({ usablePage, loadedPromise } = usablePages[index]);
+
+            await loadedPromise;
+            await usablePage.bringToFront();
+        });
+
+        describe(`Test context menu insertion on ${
+            url.match(/https?:\/\/(\w+\.)+\w+/)[0]
+        }`, () => {
+            testSnippets.forEach(({ cursorChange, expansion }) => {
+                it(`should insert ${expansion}`, async () => {
+                    const insertedText = await getContextMenuInsertion(
+                        usablePage,
+                        textBoxQueryString,
+                        cursorChange,
+                        handler,
+                    );
+
+                    await expect(insertedText).toBe(expansion);
+                });
+            });
+        });
+    });
+}
+
+module.exports = {
+    testContextMenuInsertion,
+};
diff --git a/tests/dateSnips.js b/tests/dateSnips.js
new file mode 100644
index 0000000..94acea4
--- /dev/null
+++ b/tests/dateSnips.js
@@ -0,0 +1,61 @@
+const testURLs = require("./testURLs"),
+    { getDateTestParams, getExpandedSnippet } = require("./utils");
+
+const testSnippets = [
+    {
+        snipText: "date",
+        cursorChange: "",
+        expansion: "%date%",
+    },
+    {
+        snipText: "date_dm5",
+        cursorChange: "",
+        expansion: "%date%-5",
+    },
+];
+
+function testDateSnippets(usablePages) {
+    testURLs.forEach(({ url, textBoxQueryString, handler }, index) => {
+        let usablePage,
+            loadedPromise;
+
+        beforeAll(async () => {
+            ({ usablePage, loadedPromise } = usablePages[index]);
+            await loadedPromise;
+            await usablePage.bringToFront();
+        });
+
+        describe(`Date snippet works on ${
+            url.match(/https?:\/\/(\w+\.)+\w+/)[0]
+        }`, () => {
+            testSnippets.forEach(({
+                snipText, expansion, cursorChange,
+            }) => {
+                it("should match with test dates", async () => {
+                    if (expansion === "%date%") {
+                        expansion = await getDateTestParams();
+                    } else if (expansion === "%date%-5") {
+                        const d = new Date();
+                        // eslint-disable-next-line no-magic-numbers
+                        d.setDate(d.getDate() - 5);
+                        expansion = await getDateTestParams(d.toString().split(" "));
+                    }
+
+                    const expandedText = await getExpandedSnippet(
+                        usablePage,
+                        textBoxQueryString,
+                        snipText,
+                        cursorChange,
+                        handler,
+                    );
+
+                    await expect(expandedText).toBe(expansion.join(" "));
+                });
+            });
+        });
+    });
+}
+
+module.exports = {
+    testDateSnippets,
+};
diff --git a/tests/macros.js b/tests/macros.js
new file mode 100644
index 0000000..410f4f9
--- /dev/null
+++ b/tests/macros.js
@@ -0,0 +1,103 @@
+const { getExpandedSnippet, copyTextToClipboard } = require("./utils"),
+    testURLs = require("./testURLs");
+
+function testSnippetMacroBase(usablePages, testName, testSnippets) {
+    testURLs.forEach(({ url, textBoxQueryString, handler }, index) => {
+        let usablePage,
+            loadedPromise;
+
+        beforeAll(async () => {
+            ({ usablePage, loadedPromise } = usablePages[index]);
+            // unless we bring it to front, it does not activate snippets
+            await loadedPromise;
+            await usablePage.bringToFront();
+        });
+
+        describe(`Testing snippet macro on ${
+            url.match(/https?:\/\/(\w+\.)+\w+/)[0]
+        }`, () => {
+            testSnippets.forEach(({
+                snipText, cursorChange, expansion, preExpand,
+            }) => {
+                beforeEach(async () => {
+                    const random = Math.random().toString(36).split(".")[1];
+
+                    switch (expansion) {
+                    case "%random%":
+                        expansion = random;
+                        break;
+                    case "%url%":
+                        expansion = url;
+                        break;
+                    default:
+                        break;
+                    }
+
+                    if (expansion === "%random%") {
+                        expansion = random;
+                    }
+
+                    if (preExpand.length) {
+                        const func = preExpand[0],
+                            args = preExpand.slice(1);
+
+                        args.forEach((el, i) => {
+                            if (el === "%random%") { args[i] = random; }
+                        });
+
+                        await func(usablePage, ...args);
+                    }
+                });
+
+                it(`Testing ${testName}`, async () => {
+                    const expandedText = await getExpandedSnippet(
+                        usablePage,
+                        textBoxQueryString,
+                        snipText,
+                        cursorChange,
+                        handler,
+                    );
+                    await expect(expandedText).toBe(expansion);
+                });
+            });
+        });
+    });
+}
+
+function testEmbeddedSnippet(usablePages) {
+    const embedSnippets = [{
+        snipText: "embed",
+        expansion: "be right back",
+        preExpand: [],
+    }];
+
+    testSnippetMacroBase(usablePages, "embedded snippet", embedSnippets);
+}
+
+function testURLSnippet(usablePages) {
+    const urlSnippets = [{
+        snipText: "url",
+        expansion: "%url%",
+        cursorChange: "",
+        preExpand: [],
+    }];
+
+    testSnippetMacroBase(usablePages, "url snippet", urlSnippets);
+}
+
+function testClipboardSnippet(usablePages) {
+    const clipboardSnippets = [{
+        snipText: "clipboard",
+        expansion: "%random%",
+        cursorChange: "",
+        preExpand: [copyTextToClipboard, "%random%"],
+    }];
+
+    testSnippetMacroBase(usablePages, "clipboard snippets", clipboardSnippets);
+}
+
+module.exports = {
+    testClipboardSnippet,
+    testEmbeddedSnippet,
+    testURLSnippet,
+};
diff --git a/tests/mathomania.js b/tests/mathomania.js
new file mode 100644
index 0000000..e005012
--- /dev/null
+++ b/tests/mathomania.js
@@ -0,0 +1,49 @@
+const { getExpandedSnippet } = require("./utils"),
+    testURLs = require("./testURLs");
+
+const testExpressions = [
+    {
+        snipText: "[[2+3=",
+        expansion: "5",
+        cursorChange: "",
+    },
+];
+
+/*
+ * TEST:
+ *  check if mathomania works
+ */
+function testMathomania(usablePages) {
+    testURLs.forEach(({ url, textBoxQueryString, handler }, index) => {
+        let usablePage,
+            loadedPromise;
+
+        beforeAll(async () => {
+            ({ usablePage, loadedPromise } = usablePages[index]);
+            await loadedPromise;
+            await usablePage.bringToFront();
+        });
+
+        describe(`Mathomania works on ${
+            url.match(/https?:\/\/(\w+\.)+\w+/)[0]
+        }`, () => {
+            testExpressions.forEach(({ snipText, expansion, cursorChange }) => {
+                it(`${snipText} should do the math`, async () => {
+                    const expandedText = await getExpandedSnippet(
+                        usablePage,
+                        textBoxQueryString,
+                        snipText,
+                        cursorChange,
+                        handler,
+                        false,
+                    );
+                    await expect(expandedText).toBe(expansion);
+                });
+            });
+        });
+    });
+}
+
+module.exports = {
+    testMathomania,
+};
diff --git a/tests/placeHolders.js b/tests/placeHolders.js
new file mode 100644
index 0000000..c688311
--- /dev/null
+++ b/tests/placeHolders.js
@@ -0,0 +1,48 @@
+const { getExpandedPlaceHolderSnippet } = require("./utils"),
+    testURLs = require("./testURLs");
+
+const testSnippets = [
+    {
+        snipText: "placeholder",
+        expansion: "hello yoogottam the great",
+        cursorChange: "",
+        delimitedExpansion: "hello yoogottam the great",
+    },
+];
+
+/*
+ * TEST:
+ *  check if snippets are expanding normally
+ */
+function testPlaceHolderSnippetExpansion(usablePages) {
+    testURLs.forEach(({ url, textBoxQueryString, handler }, index) => {
+        let usablePage,
+            loadedPromise;
+
+        beforeAll(async () => {
+            ({ usablePage, loadedPromise } = usablePages[index]);
+            await loadedPromise;
+            // unless we bring it to front, it does not activate snippets
+            await usablePage.bringToFront();
+        });
+
+        describe(`Placeholder snipppet expands on ${
+            url.match(/https?:\/\/(\w+\.)+\w+/)[0]
+        }`, () => {
+            testSnippets.forEach(({ snipText, expansion }) => {
+                it(`${snipText} should expand`, async () => {
+                    const expandedText = await getExpandedPlaceHolderSnippet(
+                        usablePage,
+                        textBoxQueryString,
+                        snipText,
+                        ["yoogottam", "the great"],
+                        handler,
+                    );
+                    await expect(expandedText).toBe(expansion);
+                });
+            });
+        });
+    });
+}
+
+module.exports = { testPlaceHolderSnippetExpansion };
diff --git a/tests/snipExpand.js b/tests/snipExpand.js
new file mode 100644
index 0000000..7f6df96
--- /dev/null
+++ b/tests/snipExpand.js
@@ -0,0 +1,95 @@
+const {
+        extSettings, getExpandedSnippet, updateSettings,
+    } = require("./utils"),
+    testURLs = require("./testURLs");
+
+const testSnippets = [
+    {
+        snipText: "abrbc",
+        expansion: "abe right backc",
+        cursorChange: "h",
+        delimitedExpansion: "abrb c",
+    },
+    {
+        snipText: "brb",
+        expansion: "be right back",
+        cursorChange: "",
+        delimitedExpansion: "be right back",
+    },
+];
+
+/**
+ *
+ * @param {Boolean} isDelimited
+ * @param {Array} usablePages
+ */
+function commonSnippetTest(usablePages, isDelimited = false) {
+    testURLs.forEach(({ url, textBoxQueryString, handler }, index) => {
+        let usablePage,
+            loadedPromise;
+
+        beforeAll(async () => {
+            ({ usablePage, loadedPromise } = usablePages[index]);
+            // unless we bring it to front, it does not activate snippets
+            await usablePage.bringToFront();
+            if (isDelimited) { await usablePage.reload(); } else { await loadedPromise; }
+        });
+
+        describe(`${isDelimited ? "Delimited " : ""}snipppet expands on ${
+            url.match(/https?:\/\/(\w+\.)+\w+/)[0]
+        }`, () => {
+            testSnippets.forEach(({
+                snipText, cursorChange, expansion, delimitedExpansion,
+            }) => {
+                let usableExpansion = isDelimited ? delimitedExpansion : expansion;
+
+                it(`${snipText} expands to ${usableExpansion}`, async () => {
+                    if (usableExpansion === "%url%") {
+                        usableExpansion = url;
+                    }
+
+                    const expandedText = await getExpandedSnippet(
+                        usablePage,
+                        textBoxQueryString,
+                        snipText,
+                        cursorChange,
+                        handler,
+                    );
+                    await expect(expandedText).toBe(usableExpansion);
+                });
+            });
+        });
+    });
+}
+
+/*
+ * TEST:
+ *  check if snippets are expanding normally
+ */
+function testSnippetExpansion(usablePages) {
+    commonSnippetTest(usablePages);
+}
+
+/*
+ * TEST:
+ *  check if snippets obey delimited settings
+ */
+function testSnippetExpansionDelimited(usablePages) {
+    beforeAll(async () => {
+        await updateSettings(
+            extSettings({ matchDelimitedWord: true, tabKeyExpandSpace: false }),
+        );
+    });
+
+    afterAll(async () => {
+        await updateSettings(
+            extSettings({ matchDelimitedWord: false, tabKeyExpandSpace: false }),
+        );
+    });
+    commonSnippetTest(usablePages, true);
+}
+
+module.exports = {
+    testSnippetExpansion,
+    testSnippetExpansionDelimited,
+};
diff --git a/tests/tabToSpace.js b/tests/tabToSpace.js
new file mode 100644
index 0000000..b99fdbf
--- /dev/null
+++ b/tests/tabToSpace.js
@@ -0,0 +1,49 @@
+const {
+        getTabToSpaceExpansion,
+        updateSettings,
+        extSettings,
+    } = require("./utils"),
+    testURLs = require("./testURLs");
+
+function testTabToSpaceExpansion(usablePages) {
+    beforeAll(async () => {
+        await updateSettings(
+            extSettings({ matchDelimitedWord: false, tabKeyExpandSpace: true }),
+        );
+    });
+
+    afterAll(async () => {
+        await updateSettings(
+            extSettings({ matchDelimitedWord: false, tabKeyExpandSpace: false }),
+        );
+    });
+
+    testURLs.forEach(({ url, textBoxQueryString, handler }, index) => {
+        let usablePage,
+            loadedPromise;
+
+        beforeAll(async () => {
+            ({ usablePage, loadedPromise } = usablePages[index]);
+            await loadedPromise;
+            // unless we bring it to front, it does not activate snippets
+            await usablePage.bringToFront();
+            await usablePage.reload();
+        });
+
+        describe(`Tab -> space on ${
+            url.match(/https?:\/\/(\w+\.)+\w+/)[0]
+        }`, () => {
+            it("Should convert tab -> space", async () => {
+                const text = await getTabToSpaceExpansion(
+                    usablePage,
+                    textBoxQueryString,
+                    handler,
+                );
+
+                expect(text).toBe("    ");
+            });
+        });
+    });
+}
+
+module.exports = { testTabToSpaceExpansion };
diff --git a/tests/test.js b/tests/test.js
new file mode 100644
index 0000000..f1d4dab
--- /dev/null
+++ b/tests/test.js
@@ -0,0 +1,79 @@
+const {
+        testSnippetExpansion,
+        testSnippetExpansionDelimited,
+    } = require("./snipExpand"),
+    { testPlaceHolderSnippetExpansion } = require("./placeHolders"),
+    { testMathomania } = require("./mathomania"),
+    { testTabToSpaceExpansion } = require("./tabToSpace"),
+    { testClipboardSnippet, testEmbeddedSnippet, testURLSnippet } = require("./macros"),
+    { testContextMenuInsertion } = require("./contextMenu"),
+    { testDateSnippets } = require("./dateSnips"),
+    { dismissDialog, extSettings, updateSettings } = require("./utils"),
+    testURLs = require("./testURLs");
+
+const usablePages = [],
+    JEST_TIMEOUT = 30000;
+
+/*
+ * add this since jest's default timeout is 5s only
+ * Loading a page might take longer
+ */
+jest.setTimeout(JEST_TIMEOUT);
+
+beforeAll(async () => {
+    // load all the pages
+    /* eslint-disable no-await-in-loop */
+    for (const testURL of testURLs) {
+        const usablePage = await browser.newPage();
+        await usablePage.setViewport({ width: 1920, height: 1080 });
+
+        usablePage.on("dialog", dismissDialog);
+        usablePages.push({
+            usablePage,
+            loadedPromise: usablePage.goto(testURL.url),
+        });
+    }
+    /* eslint-enable no-await-in-loop */
+
+    // to init the list of snippets used for testing
+    await updateSettings(
+        extSettings({ matchDelimitedWord: false, tabKeyExpandSpace: false }),
+    );
+});
+
+/*
+ * TESTS
+ */
+describe("Test snippet expansion", () => {
+    testSnippetExpansion(usablePages);
+});
+
+describe("Test delimited snippet expansion", () => {
+    testSnippetExpansionDelimited(usablePages);
+});
+
+describe("Test placeholder expansion", () => {
+    testPlaceHolderSnippetExpansion(usablePages);
+});
+
+describe("Test tab to space behaviour", () => {
+    testTabToSpaceExpansion(usablePages);
+});
+
+describe("Test mathomania", () => {
+    testMathomania(usablePages);
+});
+
+describe("Test macros", () => {
+    testClipboardSnippet(usablePages);
+    testEmbeddedSnippet(usablePages);
+    testURLSnippet(usablePages);
+});
+
+describe("Test context menu insertion", () => {
+    testContextMenuInsertion(usablePages);
+});
+
+describe("Test date snippets", () => {
+    testDateSnippets(usablePages);
+});
diff --git a/tests/testURLs.js b/tests/testURLs.js
new file mode 100644
index 0000000..17fb885
--- /dev/null
+++ b/tests/testURLs.js
@@ -0,0 +1,58 @@
+// eslint-disable-next-line no-unused-vars
+const { sleep } = require("./utils");
+
+/*
+const tinyCloudExpansionHandler = {
+        p: null,
+        frame: null,
+        focusTextBox: async (page) => {
+            // idk why but it fails if I don't wait :(
+            await sleep(5000);
+
+            const iframeElm = await page.$("iframe[id^=\"tiny-react\"]"),
+                iframe = await iframeElm.contentFrame();
+
+            this.frame = iframe;
+            // use the first paragraph element that you find
+            this.p = await iframe.$("p");
+
+            expect(iframeElm).toBeTruthy();
+            expect(this.p).toBeTruthy();
+
+            await iframeElm.focus();
+            await iframeElm.focus(this.p);
+        },
+        retrieveText: async () => {
+            const txt = await this.frame.evaluate(p => p.textContent, this.p);
+
+            return txt;
+        },
+        clearText: async () => {
+            await this.frame.evaluate((p) => {
+                p.innerHTML = "<br>";
+            }, this.p);
+        },
+    };
+*/
+const testURLs = [
+    {
+        url:
+      "https://stackoverflow.com/questions/50990292/"
+      + "using-octal-character-gives-warning-multi-character-character-constant",
+        textBoxQueryString: "#wmd-input",
+    },
+    {
+        url:
+      "https://serverfault.com/questions/971011/"
+      + "how-to-check-if-an-active-directory-server-is-reachable-from-an-ubuntu-apache-ph",
+        textBoxQueryString: "#wmd-input",
+    },
+    /*
+        {
+            url: "https://www.tiny.cloud/",
+            handler: tinyCloudExpansionHandler,
+        },
+        */
+];
+
+module.exports = testURLs;
diff --git a/tests/utils.js b/tests/utils.js
new file mode 100644
index 0000000..597e2d9
--- /dev/null
+++ b/tests/utils.js
@@ -0,0 +1,401 @@
+const fs = require("fs"),
+    path = require("path"),
+    util = require("util"),
+    exec = util.promisify(require("child_process").exec),
+    extensionDelay = 300;
+
+/**
+ * Wait for given milliseconds
+ * @param {Number} milliseconds to wait
+ */
+function sleep(milliseconds) {
+    return new Promise((resolve) => {
+        setTimeout(resolve, milliseconds);
+    });
+}
+
+/*
+ * Expands a snippet on the given page
+ */
+async function expandSnippet(page) {
+    // give some time [sometimes, the text didn't get expanded]
+    await sleep(extensionDelay);
+
+    // emulate default expand snip
+    await page.keyboard.down("Shift");
+    await page.keyboard.down("Space");
+    await page.keyboard.up("Space");
+    await page.keyboard.up("Shift");
+}
+
+async function clickElement(page, textBoxQueryString, handler = null, button = "left") {
+    if (handler) {
+        await handler.clickElement(page, button);
+    } else {
+        // since not using handler, it's ok
+        //  to simpy use page.focus [no need to use focusTextBox]
+
+        await page.focus(textBoxQueryString);
+        await page.click(textBoxQueryString, { button });
+    }
+}
+
+function extSettings(opts) {
+    return `
+    {
+        "snippets": [ "Snippets", 1560477878650,
+            {
+                "name": "placeholder",
+                "body": "hello %world% %again%",
+                "timestamp": 0
+            },
+            {
+                "name": "embed",
+                "body": "[[%s(brb)]]",
+                "timestamp": 1
+            },
+            {
+                "name": "url",
+                "body": "[[%u(p)]]",
+                "timestamp": 2
+            },
+            {
+                "name": "clipboard",
+                "body": "[[%p]]",
+                "timestamp": 3
+            },
+            {
+                "name": "date",
+                "body": "[[%d(ddd MMM D YYYY z)]]",
+                "timestamp": 4
+            },
+            {
+                "name": "date_dm5",
+                "body": "[[%d(!ddd MMM D-5 YYYY z)]]",
+                "timestamp": 5
+            }
+        ],
+        "blockedSites": [],
+        "charsToAutoInsertUserList": [
+            [ "(", ")" ],
+            [ "{", "}" ],
+            [ "\\"", "\\"" ],
+            [ "[", "]" ]
+        ],
+        "dataVersion": 1,
+        "language": "English",
+        "hotKey": [ "shiftKey", 32 ],
+        "dataUpdateVariable": false,
+        "matchDelimitedWord": ${opts.matchDelimitedWord},
+        "tabKey": ${opts.tabKeyExpandSpace},
+        "snipNameDelimiterList": "@#$%&*+-=(){}[]:\\"'/_<>?!., ",
+        "omniboxSearchURL": "https://www.google.com/search?q=SEARCH",
+        "wrapSelectionAutoInsert": true,
+        "ctxEnabled": true
+    }`;
+}
+
+/* Function to move the cursor a bit
+ * hjkl
+ * ----
+ *  h: move cursor left
+ *  j: move cursor down
+ *  k: move cursor up
+ *  l: move cursor right
+ *
+ * eg: to move cursor 3 left, change = "hhh"
+ */
+async function positionCursor(page, change, system = false) {
+    const changeMap = {
+        h: "ArrowLeft",
+        j: "ArrowDown",
+        k: "ArrowUp",
+        l: "ArrowRight",
+    };
+
+    /* eslint-disable no-await-in-loop */
+    for (const delta of change) {
+        if (delta in changeMap) {
+            if (!system) {
+                await page.keyboard.press(changeMap[delta]);
+            } else {
+                await exec(`xdotool key ${changeMap[delta].match(/Arrow(\w+)/)[1]}`);
+            }
+        }
+    }
+    /* eslint-enable no-await-in-loop */
+}
+
+async function focusTextBox(page, textBoxQueryString, handler) {
+    if (handler) {
+        await handler.focusTextBox(page);
+    } else {
+        await page.focus(textBoxQueryString);
+        await page.click(textBoxQueryString);
+    }
+}
+
+async function clearText(page, textBoxQueryString, handler) {
+    if (handler) {
+        await handler.clearText();
+    } else {
+        const textBox = await page.$(textBoxQueryString);
+        await page.evaluate((txtBox) => {
+            txtBox.value = "";
+        }, textBox);
+    }
+}
+
+async function retrieveText(page, textBoxQueryString, handler) {
+    let expandedText = "";
+    if (handler) {
+        expandedText = await handler.retrieveText();
+    } else {
+        const textBox = await page.$(textBoxQueryString);
+        expandedText = await page.evaluate(txt => txt.value, textBox);
+    }
+
+    return expandedText;
+}
+
+/*
+ * Function to return the expanded value of a snippet
+ */
+async function getExpandedSnippet(
+    page,
+    textBoxQueryString,
+    snipText,
+    cursorChange,
+    handler = null,
+    hotkeyRequired = true,
+) {
+    await page.bringToFront();
+
+    await focusTextBox(page, textBoxQueryString, handler);
+    await clearText(page, textBoxQueryString, handler);
+
+    // type the snip text [and some extra, if reqd]
+    await page.keyboard.type(snipText);
+
+    if (cursorChange) {
+        await positionCursor(page, cursorChange);
+    }
+
+    // expand the snippet
+    if (hotkeyRequired) {
+        await expandSnippet(page);
+    }
+
+    // wait for some time
+    await sleep(extensionDelay);
+
+    const expandedText = await retrieveText(page, textBoxQueryString, handler);
+
+    return expandedText;
+}
+
+async function getExpandedPlaceHolderSnippet(
+    page,
+    textBoxQueryString,
+    snipText,
+    values,
+    handler = null,
+) {
+    await page.bringToFront();
+
+    await focusTextBox(page, textBoxQueryString, handler);
+    await clearText(page, textBoxQueryString, handler);
+
+    // type the snip text [and some extra, if reqd]
+    await page.keyboard.type(snipText);
+
+    // expand the snippet
+    await expandSnippet(page);
+
+    // wait for some time
+    await sleep(extensionDelay);
+
+    // first place holder is already selected
+    await page.keyboard.type(values[0]);
+
+    /* eslint-disable no-await-in-loop */
+    /* eslint-disable no-magic-numbers */
+    for (
+        let placeHolderFillerIndex = 1;
+        placeHolderFillerIndex < values.length;
+        placeHolderFillerIndex++
+    ) {
+        await page.keyboard.press("Tab");
+        await page.keyboard.type(values[placeHolderFillerIndex]);
+    }
+    /* eslint-enable no-magic-numbers */
+    /* eslint-enable no-await-in-loop */
+
+    // retrieve the expanded value
+    const expandedText = await retrieveText(page, textBoxQueryString, handler);
+
+    return expandedText;
+}
+
+async function getTabToSpaceExpansion(
+    page,
+    textBoxQueryString,
+    handler = null,
+) {
+    await page.bringToFront();
+
+    await focusTextBox(page, textBoxQueryString, handler);
+    await clearText(page, textBoxQueryString, handler);
+
+    await page.keyboard.press("Tab");
+
+    const text = await retrieveText(page, textBoxQueryString, handler);
+
+    return text;
+}
+/*
+ * function to dismiss all dialogs
+ */
+async function dismissDialog(dialog) {
+    // try catch to avoid console.error on mutiple call
+    //  [cannot accept dialog which is already handled]
+    try {
+        await dialog.accept();
+    } catch (e) {
+        // no error to catch since it is ok
+    }
+}
+
+async function getPageByTitle(pageList, pageTitle) {
+    let requiredPage;
+
+    // .find() method is synchronous, so it has to return a value immediately
+    // so if it asynchronous fn argument, it probably acts weird
+    // hence use for loop
+    for (const pg of pageList) {
+        // eslint-disable-next-line no-await-in-loop
+        const title = await pg.title();
+        if (title === pageTitle) {
+            requiredPage = pg;
+            break;
+        }
+    }
+
+    return requiredPage;
+}
+
+async function getExtOptionsPage() {
+    const optionsPageTitle = "ProKeys | Options",
+        allPages = await browser.pages(),
+        extWelcomePage = await getPageByTitle(allPages, optionsPageTitle);
+
+    expect(extWelcomePage).toBeTruthy();
+
+    // dismiss dialog on page
+    extWelcomePage.on("dialog", dismissDialog);
+
+    return extWelcomePage;
+}
+
+async function updateSettings(newSettings) {
+    const settingsFile = "extSettings.txt",
+        extUploadFileFormID = "#file_input_elm",
+        importButtonQuerySelector = "button[class='import']",
+        restoreButtonQuerySelector = "button[class='restore']",
+        dontImportDupeQuerySelector = "input[name='duplicate'][value='existing']",
+        settingsPath = path.join(__dirname, settingsFile),
+        extWelcomePage = await getExtOptionsPage();
+
+    // write the settings file
+    fs.writeFile(settingsPath, newSettings, (err) => {
+        expect(err).toBeFalsy();
+    });
+
+    // bring it to front
+    await extWelcomePage.bringToFront();
+
+    // click the import button
+    const importButton = await extWelcomePage.$(importButtonQuerySelector);
+    await importButton.click();
+
+    const dupeRemover = await extWelcomePage.$(dontImportDupeQuerySelector);
+    await dupeRemover.click();
+
+    // upload the file
+    const uploadFileForm = await extWelcomePage.$(extUploadFileFormID);
+    await uploadFileForm.uploadFile(settingsPath);
+    const restoreButton = await extWelcomePage.$(restoreButtonQuerySelector);
+    await restoreButton.click();
+
+    // reload options page
+    await extWelcomePage.reload();
+
+    // remove the settings file
+    fs.unlink(settingsPath, (err) => {
+        expect(err).toBeFalsy();
+    });
+}
+
+async function copyTextToClipboard(page, textToCopy) {
+    await page.evaluate((text) => {
+        const input = document.createElement("input");
+        input.setAttribute("value", text);
+        document.body.appendChild(input);
+        input.select();
+        document.execCommand("copy");
+        document.body.removeChild(input);
+    }, textToCopy);
+}
+
+/*
+ * This function is so weird that this is needed
+ *  @param {Page} page The page on which this is to be done
+ *  @param {String} textBoxQueryString The query string for textbox in which text is to be inserted
+ *  @param {String} cursorChange The keypresses reqd to select desired menu
+ *  @param {Object} handler For RTEs, where things are handled differently
+ */
+async function getContextMenuInsertion(page, textBoxQueryString, cursorChange, handler = null) {
+    await page.bringToFront();
+
+    await focusTextBox(page, textBoxQueryString, handler);
+
+    await clearText(page, textBoxQueryString, handler);
+
+    await clickElement(page, textBoxQueryString, handler, "right");
+
+    await positionCursor(page, cursorChange, true);
+
+    await exec("xdotool key KP_Enter");
+
+    const text = await retrieveText(page, textBoxQueryString, handler);
+    return text;
+}
+
+async function getDateTestParams(dateParts = null) {
+    if (!dateParts) { dateParts = Date().toString().split(" "); }
+    // the names are the same as given in snippet docs
+    const ddd = dateParts[0],
+        MMM = dateParts[1],
+        D = dateParts[2],
+        YYYY = dateParts[3],
+        z = dateParts[5].match(/\+\d+/)[0];
+
+    return [ddd, MMM, D, YYYY, z];
+}
+
+module.exports = {
+    copyTextToClipboard,
+    dismissDialog,
+    expandSnippet,
+    extSettings,
+    getContextMenuInsertion,
+    getDateTestParams,
+    getExpandedPlaceHolderSnippet,
+    getExpandedSnippet,
+    getExtOptionsPage,
+    getPageByTitle,
+    getTabToSpaceExpansion,
+    positionCursor,
+    sleep,
+    updateSettings,
+};