As a Front End Web Developer, experimenting with new tools to add to your workflow (and going down the rabbit hole with them!) is all part and parcel of refining your craft. Chris Eccles, Technical Manager at Building Blocks has been doing just this and has some invaluable insight into CSS Visual Regression using Backstop.JS.
CSS Visual Regression testing is the process of running automated visual test comparisons on pages or elements in your projects. Using Backstop.JS, Chris has discovered that this tool is intuitive, allowing quick configuration to allow you to get up and rolling quickly.
Backstop.JS serves your tests via a webpage which gives you the visual feedback needed for targeting bugs caused from CSS related issues. These comparisons can uncover bugs you’d otherwise not learn about until it’s too late. A very useful tool to have in your Front End arsenal, wouldn’t you agree?
Chris has been sharing his insights with the BB team and wanted to share with our blog readers also. So, sit back and enjoy the ride through the wonderful world of Backstop.JS.
BackStopJS - how to avoid visual regression of our web application?Michał Ślęzak
BackStopJS is a tool that helps prevent visual regression by taking screenshots of web pages and comparing them pixel-by-pixel across runs to detect changes. It is an open source NPM package that uses Chrome/Puppeteer to capture screenshots, generates HTML and JUnit reports, and supports parallel testing. BackStopJS is easy to set up and use, but is not well-suited for dynamic content. While other commercial tools like Applitools may integrate better with UI tests, BackStopJS provides a free and simple way to start visual regression testing.
Introducing Playwright's New Test RunnerApplitools
Playwright Test is a new test runner built from scratch by the Playwright team specifically to accommodate end-to-end testing needs. Join Principal Engineer, Andrey Lushinkov as he demonstrates how to use Playwright Test to author new tests, how to migrate existing tests, how to deploy them on CI, and debug them if something goes wrong.
Flutter overview - advantages & disadvantages for businessBartosz Kosarzycki
After half a year experience with Fluttter, two internal projects and one commercial one, we'd like to share our view on what FLUTTER as a framework gives developers and businesses alike.
Progressive Web App (PWA) is a term used to denote web apps that use the latest web technologies. Progressive web apps are technically regular web pages (or websites) but can appear to the user like traditional applications or (native) mobile applications. This new application type attempts to combine features offered by most modern browsers with the benefits of mobile experience.
Introduction to "TestProject" tool and first testcase with TestProjectAdvait Kshirsagar
This presentation talks about the - Introduction of "TestProject" tool and its features with steps to create your first test case with TestProject Tool.
NOTE: Download the slide/ppt to see the Demo GIFs. This is created while learning the tool and #happytoshare with others who are willing to learn and explore new tools.
A Progressive Web App (PWA) is a web app that uses modern web capabilities to deliver an app-like experience to users. These apps meet certain requirements, are deployed to web servers and accessible through URLs (on HTTPS protocol).
Flask is a micro web framework written in Python that allows developers to create web applications and APIs quickly. It is lightweight and extensible, allowing developers to add additional functionality through extensions. Flask applications are easy to get started with - they can be created with just a few lines of code. Common features like unit testing, database support, and template rendering are supported out of the box or through extensions.
BackStopJS - how to avoid visual regression of our web application?Michał Ślęzak
BackStopJS is a tool that helps prevent visual regression by taking screenshots of web pages and comparing them pixel-by-pixel across runs to detect changes. It is an open source NPM package that uses Chrome/Puppeteer to capture screenshots, generates HTML and JUnit reports, and supports parallel testing. BackStopJS is easy to set up and use, but is not well-suited for dynamic content. While other commercial tools like Applitools may integrate better with UI tests, BackStopJS provides a free and simple way to start visual regression testing.
Introducing Playwright's New Test RunnerApplitools
Playwright Test is a new test runner built from scratch by the Playwright team specifically to accommodate end-to-end testing needs. Join Principal Engineer, Andrey Lushinkov as he demonstrates how to use Playwright Test to author new tests, how to migrate existing tests, how to deploy them on CI, and debug them if something goes wrong.
Flutter overview - advantages & disadvantages for businessBartosz Kosarzycki
After half a year experience with Fluttter, two internal projects and one commercial one, we'd like to share our view on what FLUTTER as a framework gives developers and businesses alike.
Progressive Web App (PWA) is a term used to denote web apps that use the latest web technologies. Progressive web apps are technically regular web pages (or websites) but can appear to the user like traditional applications or (native) mobile applications. This new application type attempts to combine features offered by most modern browsers with the benefits of mobile experience.
Introduction to "TestProject" tool and first testcase with TestProjectAdvait Kshirsagar
This presentation talks about the - Introduction of "TestProject" tool and its features with steps to create your first test case with TestProject Tool.
NOTE: Download the slide/ppt to see the Demo GIFs. This is created while learning the tool and #happytoshare with others who are willing to learn and explore new tools.
A Progressive Web App (PWA) is a web app that uses modern web capabilities to deliver an app-like experience to users. These apps meet certain requirements, are deployed to web servers and accessible through URLs (on HTTPS protocol).
Flask is a micro web framework written in Python that allows developers to create web applications and APIs quickly. It is lightweight and extensible, allowing developers to add additional functionality through extensions. Flask applications are easy to get started with - they can be created with just a few lines of code. Common features like unit testing, database support, and template rendering are supported out of the box or through extensions.
Webpack is a build tool that bundles assets and optimizes frontend projects. It supports bundling of CSS, images, and other file types alongside JavaScript code. Loaders allow preprocessing of files, and plugins enable functionality like code splitting, asset optimization, environment variable injection, and more. Webpack bundles modules together and outputs static assets to serve on a production server. Its flexibility, loaders, and plugins make it well-suited for large projects with complex asset workflows.
This document provides an overview of a RESTful JSON API. It discusses that the API uses a REST design with JSON as the output format. It also describes other common protocols like SOAP and XML-RPC. The API is intended for use by desktop, mobile, and third-party web applications that can communicate over HTTP. Key aspects covered include input-output design, error handling, documentation, and user authentication using OAuth. The API implementation leverages the Sinatra framework with common logic modules to share data and configuration across applications. SDKs are also discussed to help integrate external apps with the API.
This document discusses progressive web applications (PWAs), which aim to provide users with an app-like experience through the web. PWAs load quickly, work offline or on low-quality networks, feel native on devices, and are discoverable. The key aspects that define a PWA are HTTPS, a web app manifest, and a service worker. Case studies show that popular sites like AliExpress, Flipkart and Google I/O saw significant increases in user engagement and conversion through PWAs compared to regular web or native apps. Service workers allow caching assets, pushing notifications, and handling requests when offline to improve the user experience.
Puppeteer can automate that! - FrontmaniaÖnder Ceylan
Puppeteer is a node library which provides a high-level API to control Chrome over the DevTools Protocol. When combined with the power of the web technologies, it can be used for automating image processing and batch file generation, creating automated visual testing with device emulation, tracking page loading performance, enforcing performance and code coverage budgets on CI, crawling a SPA, capturing a timeline trace of your site to help diagnose performance issues and more!
We'll explore those capabilities of Puppeteer API with combination of DevTools protocol and cloud functions (FaaS) with a showcase of real life use cases demonstrated by live-examples. Finally, we’ll go through the existing puppeteer based SaaS solutions such as Checkly and Browserless.
Why Progressive Web App is what you need for your BusinessLets Grow Business
Progressive Web Apps (PWAs) are web applications that have responsive designs, work offline, and can be installed on a user's home screen. Key features of PWAs include being responsive across devices, working offline through service workers, being discoverable through web app manifests, automatically updating, using secure HTTPS connections, and allowing users to re-engage through push notifications and installing on home screens without an app store. PWAs provide faster experiences for web users compared to regular websites and allow developers to engage users similar to native mobile apps.
No drama here - E2E-testing django with playwrightMastacheata1
Presentation given at the 30th Django Meetup Cologne on April 19th 2022.
The presentation shows a few of the key benefits of Playwright and how to use it with Django/Python in General.
The presentation was held at and sponsored by my employer Ambient Innovation GmbH
Flutter allows building beautiful native apps for iOS and Android from a single codebase. It uses Skia for rendering and widgets as basic building blocks. Dart is the programming language used, which is easy to learn and supports JIT and AOT compilation. Everything in Flutter is represented as a widget, from structural elements to layout properties. Widgets are composed together rather than using inheritance. Stateful widgets create State objects that can rebuild when the state changes. Flutter focuses on composition over inheritance and uses widgets as the fundamental building blocks.
Flutter is an open-source framework for building beautiful, natively compiled mobile applications for iOS and Android from a single codebase. It allows developers to build fast, productive apps with no compromises for designers due to its optimized UI framework and productivity during development even while the app is running. Flutter is growing rapidly in popularity among software engineers and is used by major brands to build apps with large user bases.
Lets Flutter - Talk on flutter in Google IO Extended in Google Developer Group Mumbai.
This has a detailed view of flutter and comparison of React native vs Flutter vs Native app development
Firebase is a real-time backend service that allows developers to build mobile and web applications without having to manage their own backend infrastructure. It provides features like analytics, notifications, crash reporting, authentication, and cloud storage out of the box. As a NoSQL database, it allows for fast response times compared to traditional web services. Firebase is useful for building real-time applications like chat apps or ones that require syncing data across multiple devices. It also offers benefits like free scalability, push notifications, and integration with other Google services and platforms.
ZIO: Powerful and Principled Functional Programming in ScalaWiem Zine Elabidine
This is an introduction of purely functional programming type safe abstractions that provide a variety of features for building asynchronous and concurrent applications data structures built on ZIO.
You'll learn by examples about the power of functional programming to solve the hard problems of software development in a principled, without compromises.
Flutter is an open-source UI toolkit created by Google that allows developers to build mobile, web, and desktop applications from a single codebase. It uses Dart as its programming language and employs a hybrid approach combining both native and web development techniques. In Flutter, everything that appears on the screen is represented as a Widget, whether visible or invisible, and widgets can be either stateless or stateful depending on whether their appearance changes over time in response to events.
The document discusses building progressive web apps (PWAs). PWAs are web applications that are fast, reliable and engaging like native mobile apps. The key aspects of PWAs discussed are:
1) They use technologies like service workers, web app manifests and push notifications to provide app-like capabilities and improve user experience and engagement on the web.
2) An example of Flipkart, an Indian e-commerce site, is provided which saw 3x time spent and 40% returning visitors with their PWA implementation.
3) Core features discussed that make PWAs engaging include fast loading, adding to homescreen for app-like launching, handling flaky networks well, instant reloading and
Progressive web apps (PWAs) are a new type of application that combines the best of the web and the best of native apps. PWAs use newer web platform features and service workers to deliver app-style experiences to users. Some key benefits of PWAs include providing responsive and reliable experiences that load instantly and feel like regular apps to users, while also being able to reach users on any device via a web URL rather than an app store. PWAs aim to reduce the barriers between the web and native apps.
Flutter is an open-source toolkit created by Google that allows developers to build cross-platform apps for Android, iOS, and the web from a single codebase. It uses widgets to build applications and provides pre-built widgets as well as the ability to create custom widgets. Flutter aims to make deployment easier by targeting multiple platforms from a single codebase.
This presentation was shown at Spring Framework Meeting 2009 in Rome (Lazio - Italy) - 31th October 2009.
http://www.open4dev.com/journal/2009/10/26/spring-framework-meeting-2009-rome.html
Abstract:
Spring LDAP basics: how to start to use the LdapTemplate in your custom J2EE application. This how-to will show you how to bind, unbind, search and authenticate users in your LDAP using the LdapTemplate provided by Spring.
VueJs is a front-end framework for building JavaScript applications that run in the browser. It allows creation of components, two-way data binding, communication between components, and conditional rendering. To install Vue, use npm to install vue-cli and initialize a project, which will create the initial project structure including a component template with sections for template, script, and style. Components can then be built with data, methods, and bindings for properties like classes and styles.
Cross browser testing with browser stackDenys Poloka
This document discusses cross-browser testing using BrowserStack. It provides an agenda that covers why cross-browser testing is needed, why to use BrowserStack, basic concepts of BrowserStack usage, and leaves time for questions. BrowserStack allows testing across over 1100 real browsers and devices without requiring local installations. It also supports many programming languages and testing frameworks.
This document discusses responsive image techniques for adaptive web design. It begins by explaining browser sniffing versus feature testing, and recommends using feature testing to determine browser width, screen resolution, and bandwidth instead of browser sniffing. It then covers techniques like using background-size to control image sizes, SVG for smaller file sizes, and font-based solutions. The document also discusses server-side techniques like .htaccess rewrite rules and client-side techniques like picture and HiSRC. It advocates for a mobile-first approach using CSS media queries and a single pixel GIF for responsive images.
This document discusses responsive image techniques for adaptive web design. It covers using fluid grids with percentages instead of pixels, media queries to load different CSS stylesheets for different screen widths, and setting image max-widths to 100% so they scale responsively. It also discusses feature testing browser width with JavaScript instead of browser sniffing, handling high pixel density "Retina" displays, and techniques like .htaccess rewriting, <picture> element, and JavaScript libraries to serve the most appropriate image assets. The focus is on delivering the right image for each device or screen size to optimize for bandwidth, performance, and user experience.
Webpack is a build tool that bundles assets and optimizes frontend projects. It supports bundling of CSS, images, and other file types alongside JavaScript code. Loaders allow preprocessing of files, and plugins enable functionality like code splitting, asset optimization, environment variable injection, and more. Webpack bundles modules together and outputs static assets to serve on a production server. Its flexibility, loaders, and plugins make it well-suited for large projects with complex asset workflows.
This document provides an overview of a RESTful JSON API. It discusses that the API uses a REST design with JSON as the output format. It also describes other common protocols like SOAP and XML-RPC. The API is intended for use by desktop, mobile, and third-party web applications that can communicate over HTTP. Key aspects covered include input-output design, error handling, documentation, and user authentication using OAuth. The API implementation leverages the Sinatra framework with common logic modules to share data and configuration across applications. SDKs are also discussed to help integrate external apps with the API.
This document discusses progressive web applications (PWAs), which aim to provide users with an app-like experience through the web. PWAs load quickly, work offline or on low-quality networks, feel native on devices, and are discoverable. The key aspects that define a PWA are HTTPS, a web app manifest, and a service worker. Case studies show that popular sites like AliExpress, Flipkart and Google I/O saw significant increases in user engagement and conversion through PWAs compared to regular web or native apps. Service workers allow caching assets, pushing notifications, and handling requests when offline to improve the user experience.
Puppeteer can automate that! - FrontmaniaÖnder Ceylan
Puppeteer is a node library which provides a high-level API to control Chrome over the DevTools Protocol. When combined with the power of the web technologies, it can be used for automating image processing and batch file generation, creating automated visual testing with device emulation, tracking page loading performance, enforcing performance and code coverage budgets on CI, crawling a SPA, capturing a timeline trace of your site to help diagnose performance issues and more!
We'll explore those capabilities of Puppeteer API with combination of DevTools protocol and cloud functions (FaaS) with a showcase of real life use cases demonstrated by live-examples. Finally, we’ll go through the existing puppeteer based SaaS solutions such as Checkly and Browserless.
Why Progressive Web App is what you need for your BusinessLets Grow Business
Progressive Web Apps (PWAs) are web applications that have responsive designs, work offline, and can be installed on a user's home screen. Key features of PWAs include being responsive across devices, working offline through service workers, being discoverable through web app manifests, automatically updating, using secure HTTPS connections, and allowing users to re-engage through push notifications and installing on home screens without an app store. PWAs provide faster experiences for web users compared to regular websites and allow developers to engage users similar to native mobile apps.
No drama here - E2E-testing django with playwrightMastacheata1
Presentation given at the 30th Django Meetup Cologne on April 19th 2022.
The presentation shows a few of the key benefits of Playwright and how to use it with Django/Python in General.
The presentation was held at and sponsored by my employer Ambient Innovation GmbH
Flutter allows building beautiful native apps for iOS and Android from a single codebase. It uses Skia for rendering and widgets as basic building blocks. Dart is the programming language used, which is easy to learn and supports JIT and AOT compilation. Everything in Flutter is represented as a widget, from structural elements to layout properties. Widgets are composed together rather than using inheritance. Stateful widgets create State objects that can rebuild when the state changes. Flutter focuses on composition over inheritance and uses widgets as the fundamental building blocks.
Flutter is an open-source framework for building beautiful, natively compiled mobile applications for iOS and Android from a single codebase. It allows developers to build fast, productive apps with no compromises for designers due to its optimized UI framework and productivity during development even while the app is running. Flutter is growing rapidly in popularity among software engineers and is used by major brands to build apps with large user bases.
Lets Flutter - Talk on flutter in Google IO Extended in Google Developer Group Mumbai.
This has a detailed view of flutter and comparison of React native vs Flutter vs Native app development
Firebase is a real-time backend service that allows developers to build mobile and web applications without having to manage their own backend infrastructure. It provides features like analytics, notifications, crash reporting, authentication, and cloud storage out of the box. As a NoSQL database, it allows for fast response times compared to traditional web services. Firebase is useful for building real-time applications like chat apps or ones that require syncing data across multiple devices. It also offers benefits like free scalability, push notifications, and integration with other Google services and platforms.
ZIO: Powerful and Principled Functional Programming in ScalaWiem Zine Elabidine
This is an introduction of purely functional programming type safe abstractions that provide a variety of features for building asynchronous and concurrent applications data structures built on ZIO.
You'll learn by examples about the power of functional programming to solve the hard problems of software development in a principled, without compromises.
Flutter is an open-source UI toolkit created by Google that allows developers to build mobile, web, and desktop applications from a single codebase. It uses Dart as its programming language and employs a hybrid approach combining both native and web development techniques. In Flutter, everything that appears on the screen is represented as a Widget, whether visible or invisible, and widgets can be either stateless or stateful depending on whether their appearance changes over time in response to events.
The document discusses building progressive web apps (PWAs). PWAs are web applications that are fast, reliable and engaging like native mobile apps. The key aspects of PWAs discussed are:
1) They use technologies like service workers, web app manifests and push notifications to provide app-like capabilities and improve user experience and engagement on the web.
2) An example of Flipkart, an Indian e-commerce site, is provided which saw 3x time spent and 40% returning visitors with their PWA implementation.
3) Core features discussed that make PWAs engaging include fast loading, adding to homescreen for app-like launching, handling flaky networks well, instant reloading and
Progressive web apps (PWAs) are a new type of application that combines the best of the web and the best of native apps. PWAs use newer web platform features and service workers to deliver app-style experiences to users. Some key benefits of PWAs include providing responsive and reliable experiences that load instantly and feel like regular apps to users, while also being able to reach users on any device via a web URL rather than an app store. PWAs aim to reduce the barriers between the web and native apps.
Flutter is an open-source toolkit created by Google that allows developers to build cross-platform apps for Android, iOS, and the web from a single codebase. It uses widgets to build applications and provides pre-built widgets as well as the ability to create custom widgets. Flutter aims to make deployment easier by targeting multiple platforms from a single codebase.
This presentation was shown at Spring Framework Meeting 2009 in Rome (Lazio - Italy) - 31th October 2009.
http://www.open4dev.com/journal/2009/10/26/spring-framework-meeting-2009-rome.html
Abstract:
Spring LDAP basics: how to start to use the LdapTemplate in your custom J2EE application. This how-to will show you how to bind, unbind, search and authenticate users in your LDAP using the LdapTemplate provided by Spring.
VueJs is a front-end framework for building JavaScript applications that run in the browser. It allows creation of components, two-way data binding, communication between components, and conditional rendering. To install Vue, use npm to install vue-cli and initialize a project, which will create the initial project structure including a component template with sections for template, script, and style. Components can then be built with data, methods, and bindings for properties like classes and styles.
Cross browser testing with browser stackDenys Poloka
This document discusses cross-browser testing using BrowserStack. It provides an agenda that covers why cross-browser testing is needed, why to use BrowserStack, basic concepts of BrowserStack usage, and leaves time for questions. BrowserStack allows testing across over 1100 real browsers and devices without requiring local installations. It also supports many programming languages and testing frameworks.
This document discusses responsive image techniques for adaptive web design. It begins by explaining browser sniffing versus feature testing, and recommends using feature testing to determine browser width, screen resolution, and bandwidth instead of browser sniffing. It then covers techniques like using background-size to control image sizes, SVG for smaller file sizes, and font-based solutions. The document also discusses server-side techniques like .htaccess rewrite rules and client-side techniques like picture and HiSRC. It advocates for a mobile-first approach using CSS media queries and a single pixel GIF for responsive images.
This document discusses responsive image techniques for adaptive web design. It covers using fluid grids with percentages instead of pixels, media queries to load different CSS stylesheets for different screen widths, and setting image max-widths to 100% so they scale responsively. It also discusses feature testing browser width with JavaScript instead of browser sniffing, handling high pixel density "Retina" displays, and techniques like .htaccess rewriting, <picture> element, and JavaScript libraries to serve the most appropriate image assets. The focus is on delivering the right image for each device or screen size to optimize for bandwidth, performance, and user experience.
vodQA Pune (2019) - Browser automation using dev toolsvodQA
This document discusses browser automation using Chrome DevTools. It explains that DevTools allows automating most browser features through the Chrome DevTools Protocol. It then demonstrates how to use the protocol by listening to it and debugging a remote Chrome instance. The document also introduces Puppeteer, a Node library that provides a high-level API to control Chrome over the DevTools Protocol. It shows various Puppeteer examples like handling authentication, network emulation, and geolocation. Finally, it discusses how existing Selenium tests can leverage DevTools by enabling ChromeDriver logs and connecting to the remote debugger port.
This document discusses using AngularJS to build Chrome extensions. It covers hosted applications, packaged applications, and extensions. Extensions can access Chrome APIs and have permissions like modifying context menus. AngularJS is well-suited for extensions because data binding makes sharing data between pages easy and its templates work within the Content Security Policy restrictions of extensions. The document demonstrates binding extension data to the $rootScope to synchronize with LocalStorage, and using $apply to update the scope from asynchronous Chrome API callbacks.
This document discusses various techniques for responsive images in web design, including browser sniffing versus feature testing, image sizes for different screen resolutions and bandwidths, and different implementation methods like .htaccess files, the <picture> element, and JavaScript libraries. It covers topics like using the browser width to determine layouts, screen resolution detection, and bandwidth testing. Workarounds discussed include using background images, SVGs, icon fonts, and compressed JPEGs. The document advocates a mobile-first approach and using CSS media queries to adapt designs based on screen size.
This document summarizes new features coming in major browsers, including Firefox 3.5, Safari 4, Internet Explorer 9, Opera 10, and Google Chrome 2. The browsers will have better JavaScript performance due to advanced engines like TraceMonkey, SquirrelFish, and V8. New features include process per tab, postMessage for cross-domain communication, getElementsByClassName, querySelectorAll, and HTML5 features like local SQL storage, JSON support, and canvas drawing.
Panther is a browser testing and web scraping library that allows testing of JavaScript interactions and asynchronous calls in Symfony applications using real web browsers. It was presented as a solution to problems faced by the technical team at DietWater LTD, including cross-browser testing, preventing visual regressions during development, and scraping reviews from multiple websites. Panther can be easily integrated into Symfony applications and provides features like screenshots, waiting for elements, and executing scripts to help with testing JavaScript functionality and asynchronous behavior.
Puppeteer is a Node library that provides a high-level API to control headless Chrome or Chromium over the DevTools Protocol. It can generate screenshots, crawl SPAs, automate form submission and UI testing, and more. Puppeteer communicates with the browser using the DevTools Protocol and controls browser instances, browser contexts within instances, pages within contexts, and frames within pages. It is maintained by the Chrome DevTools team.
This document provides an introduction to web components and discusses their benefits. It explains that web components bring a native component model to HTML, allowing for reusable UI functionality both within and across applications. The document demonstrates several types of web components, including custom elements, HTML templates, HTML imports, and shadow DOM. It also discusses browser support for web components and strategies for improving support, such as using polyfills.
Automating cross-browser testing can save time and resources when tests need to be run repeatedly across multiple browsers. The document discusses when to automate testing and provides examples of automating static and dynamic page tests. For static page tests, screenshots are taken in different browsers and compared to identify visual differences. For dynamic tests, screenshots are taken after each user interaction to check for issues. Selenium is used to automate browser interactions and ImageMagick compares screenshots.
IBM Rational Host Access Transformation Services (HATS) can dynamically transform your terminal-based applications into rich web pages. It is highly customizable and built on Java EE technology. We'll discuss some lessons learned from a very (very) complex HATS engagement. We'll discuss proper development strategies, and how to distribute workload across team members. We'll introduce a novel approach to unit testing advanced customizations using JUnit, and will also talk about how to address functional testing.
This document discusses the Android Chromium rendering pipeline. It covers topics like the critical rendering path in browsers, Chromium's multi-process architecture, and differences between Chrome, Chromium WebView, and the Android rendering model. The document also looks at how Chromium uses techniques like GPU acceleration, multi-threading, and layers to improve performance. Finally, it examines the current and future states of the Android WebView.
This document discusses various topics related to developing web apps, including HTML5, responsive design, touch events, offline capabilities, and debugging tools. It provides links to resources on HTML5 features like media queries, SVG, web workers, and the page visibility API. It also covers techniques for adapting content like responsive web design, progressive enhancement, and server-side adaptation. Mobile browser stats and popular devices on Douban are mentioned. Frameworks like Bootstrap and tools like Weinre for debugging mobile apps are referenced.
This document discusses various techniques for making web applications work offline and with unreliable network connections, including:
- The application cache manifest which allows specifying cached resources to work offline
- Issues with the current manifest specification and potential enhancements
- The window.applicationCache API for caching resources and monitoring cache status
- Detecting online/offline status using the navigator.onLine property
In 3 sentences or less, it summarizes approaches for offline web applications using the application cache manifest, applicationCache API, and navigator.onLine property.
Be ef presentation-securitybyte2011-michele_orruMichele Orru
Outline:
What the hell is BeEF? ✴Cutting
Target enumeration and analysis ✴Devouring
Internal net fingerprint Exploiting internal services through the hooked browser Keylogging, browser pwnage
✴Digesting Persistence, tunneling sqlmap/Burp through BeEF proxy XSSrays integration
✴Future development and ideas
An introduction to PhantomJS: A headless browser for automation test.BugRaptors
PhantomJS has a whole set of features that testers love and use for many purposes. It is primarily used for a headless testing of web applications. PhantomJS fits for both as a part of a constant integration system and universal command-line based testing. It is important to recall that PhantomJS itself is not a testing framework, it is only engaged to launch the tests through a suitable test runner.
How to build web sites that work well across various browsers versions and devices is always challenging for web developers. In the session, you’ll learn the best practices and strategy to develop cross-browser web sites that will work with the existing and future browsers. Tools for interoperability tests, cross-browser fundamentals, and tips and tricks on HTML5, CSS, JavaScript development will be illustrated. Feature detection, CSS prefix, and fallbacks will all be examined in the session. A real life example will be used to demonstrate step by step how to build cross-browser and plug-in-Free experiences. With a couple of simple changes to your sites, you can take advantage of web standards and HTML5 features today without breaking your sites in the future. Expect a lot of demos and code in the session.
This document discusses building testable, client-side MVC apps in JavaScript using Spine, Jasmine, and Node.js. It advocates pushing as much work to the client as possible for responsiveness, and outlines a thin-server architecture with common front-end technologies and libraries to structure code, add interactivity, and optimize resources.
Similar to Technical Tips: Visual Regression Testing and Environment Comparison with Backstop.JS (20)
Advice on how organisations can focus on the four digital transformation foundational pillars – People, Process, Platform and Performance – to drive change and instill digital into their organisation’s DNA.
Digital Foundations: 3 Simple Steps to Changing your Digital DNABuilding Blocks
This document provides information on developing a digital roadmap. It discusses constructing a simple roadmap of digital activities mapped out over the short, medium, and long term. It also discusses mapping audience needs by developing personas and experience maps. Finally, it discusses measuring digital performance by developing key performance indicators and tracking tools. The overall goal is to help organizations plan and prioritize their digital investments and strategies over time to maximize efficiency and drive digital progress.
How to create a compelling business case for Digital TransformationBuilding Blocks
Often, one of the greatest challenges for marketers is persuading senior leaders to more fully embrace digital within their organisations. Many marketers have a good idea about what they want to do, but need to argue the case internally in order to receive funding. In many cases, this is the major barrier to moving towards digital transformation.
It is imperative to have a clearly informed business case that helps position how digital can closely align with the goals of the business, and not on digital trends and fashions.
This presentation, which Building Blocks' co-founder, Jonathan Whiteside presented at the Figaro Digital Summit in March 2015, provides six practical tips for creating a business case.
Transforming One Small Step At A Time: Optimisation & TestingBuilding Blocks
Digital transformation isn't a project - it's continuous: small experiments which lead to a culture of improvement through learning.
In the presentation, Principle Consultant Jonathan Whiteside and UX & Site Optimisation Consultant Kyle Cassidy discuss how to plan and test for continual user experience improvements, to ensure your optimisation goals are aligned with your organisation's overall annual objectives. They also share practical measuring and reporting tips.
First presented at the Figaro Digital Conference on 27 November 2014.
Tackling 8 Digital Challenges of the Agrochemical, Industrial & Specialty Che...Building Blocks
Digital marketing presents a large opportunity for the chemical sectors. Building Blocks work with a number of global organisations in this industry, and have found that the complexity of these businesses creates a number of unique challenges when using digital communications.
However, with the challenges come opportunities. In this whitepaper and supporting slide deck, we’ve identified eight of the key challenges faced by these industries, that we’ve helped tackle over the past few years.
The importance of testing in a web design & build projectBuilding Blocks
Building Blocks co-founder Jonathan Whiteside's slides on the importance of testing in a web design and build project, as presented at Figaro Digital's design and build seminar in August 2014.
Going Digital First with Publishing for Lloyd's RegisterBuilding Blocks
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2. 1
I would define visual testing as using a headless browser to capture and
compare images of components of a website.
This can be used to implement unit tests for how the CSS is rendering the HTML
in a browser.
Not intended to test how the HTML is generated or replace Unit tests in a back
end service layer.
Not intended to replace cross browser testing.
Allows comparison between sites or comparing against a reference image
captured form the same site before changes were made.
What do you mean by Visual
Testing ?
3. 1. Chrome Headless
2. Setup and Examples
3. What to test
4. Setup in your project
Contents :
5. 4
Headless Chrome is shipping in Chrome 59. It's a way to run the Chrome
browser in a headless environment. Essentially, running Chrome without
chrome! It brings all modern web platform features provided by Chromium
and the Blink rendering engine to the command line.
Why is that useful?
A headless browser is a great tool for automated testing and server
environments where you don't need a visible UI shell. For example, you may
want to run some tests against a real web page, create a PDF of it, or just
inspect how the browser renders an URL.
Announcement blog :
https://developers.google.com/web/updates/2017/04/headless-chrome
How to Get it:
As long as you have a version of chrome installed greater than Chrome 59 –
( Chrome 61 on Windows) you already have it
Chrome Headless
6. 5
BackstopJS automates visual regression testing of your responsive web UI by
comparing DOM screenshots over time.
Backstop is a open source project to run visual tests using headless browsers to
capture screenshots.
Originally ran using either PhantomJS or SlimerJS headless browser libraries.
These were implementations of WebKit (Chrome) or Gecko (Firefox).
From release v3.0.19 this now supports Chrome headless.
The latest release has a lot of stability improvements v3.0.27
Git Hub URL : https://github.com/garris/BackstopJS
Features :
• Allows capture and comparison of screenshots form headless browser
• Excellent comparison tool to identify and highlight differences
• Allows setup of multiple breakpoints to test responsive sites
• Uses simple CSS selectors to identify what to capture
• Pre capture scripts can be enabled to be ran
Backstop JS
7. 6
Chrome is based on WebKit but using PhantomJS as a headless browser
caused issues making it unusable.
There would be styling issues that would be thrown that would not be present on
the site when viewed through chrome.
As visual testing is about how the site renders this causes the tests to be
unreliable.
When I investigated implementing visual testing this was the stumbling block
each time.
Chrome != Webkit
9. 8
• backstop init : Set up a new BackstopJS instance -- specify URLs, cookies,
screen sizes, DOM selectors, interactions etc. (see examples directory)
• backstop test : BackstopJS creates a set of test screenshots and compares
them with your reference screenshots. Any changes show up in a visual
report. (Run this after making CSS changes as many times as needed.)
• backstop approve : If the test you ran looks good, then go ahead and
approve it. Approving changes will update your reference files with the
results from your last test. Future tests are compared against your most
recent approved test screenshots.
The BackstopJS workflow
15. 14
On the CIPD PM build we have incorporated it in to the HTML dev process.
When components are created a new test scenario is added to the backstop
tests.
This captures the components from the locally setup demo site.
This creates a reference image for that component that is then checked in to
source control.
Project Setup
17. 16
Visual regression testing is the process of creating reference images for each
component as they are created. This allows a comparison over time to monitor
changes.
Ran by the developer on their local development environment after changes
made to ensure no regressions issues have occurred due to their changes.
Why is that useful?
• This allows the developer greater test coverage than they could do manually
when ensuring their changes have not had regression impact on other
components.
• Allows greater detail comparison than possible reviewing the site manually.
E.g. If the font size is increased by 1px then it will be caught which could
easily be missed.
• Allows developers without a full understanding of the project have a safety
net about what the site should look like before their changes.
Visual Regression Testing
18. 17
Using visual testing to compare different environments involves comparing one
site against another . The reference images are not stored beyond the test.
A reference image set is generated form one site and then another site is
compared against them
Why is that useful?
• To ensure that the HTML created has been integrated within the website
correctly and is rendering out in the same way. This highlights mistakes with
the integration or conflicting integrations that are not present on the HTML
Demo site.
• Running regression tests against the Staging and Live instances of a site to
see where the changes have occurred.
• When setting up comparison between a demo and dev site powered by a
CMS this can make the tests brittle so the tests pages need to be isolated
from changes in content as possible.
Environment Comparison
19. 18
Within a site their are hover states and interactive components. These need the
mouse or user interactions to trigger them.
How to test these in a headless browser?
Backstop allows scripts to be ran before a screenshot is captured. Using the
chromy API you can move the mouse and manipulate the page through script.
This allows testing of :
• Field entry
• Hover states
• Interactive items
• Video loading – Playing
• Ajax content loading
Chromy Git Hub URL : https://github.com/OnetapInc/chromy
Interacting with the site
20. 19
When capturing items it is much quicker to capture components on a page than
the whole page to compare them
• It is much quicker to compare the smaller images
• It is more relevant the items that are being tested.
This allows the components themselves to be bested in isolation and most of our
development work is done using component based development.
Smaller is better
22. Process to include in you
project
21
Install
Backstop
init within you
project Create
scenarios
Run Baseline
generation
Keep running
and
monitoring
23. 22
Prerequisites
• Node – (If you don’t already have it)
• Chrome - (61 needed but latest is 62.0.3202.62 at the moment)
• Update node to v8+
• Update npm to v5+
On Windows you will also need to have python installed
> PhantomJS needs Python -- please make sure you have Python installed...
see https://github.com/garris/BackstopJS/issues/185
Installation
• npm install -g backstopjs
• Installs backstop globally
This allows the backstop command to be ran from anywhere on the PC.
Install Backstop - Globally
24. 23
Backstop can also be installed as a grunt dependency and called through grunt.
var backstopjs = require('backstopjs');
grunt.registerTask('backstop', 'BackstopJS integration', function(cmd) {
// cmd is either 'reference', 'test', or 'openReport'
var done = this.async();
backstopjs(cmd).then(function() {
done(true);
}).catch(function() {
done(false);
});
});
This allows it to be integrated in to the existing grunt tasks.
Including it in grunt also allows the dynamic creation of the scenarios using
variables instead of them being held in a JSON file.
Installing Backtop in Grunt
25. 24
There is a basic backstop.json file that is created when you run backstop init.
This can be edited to add in your own scenarios.
This is an example of the setup we are using.
Key Points:
• The Viewports are defined for use in all tests
• resembleOutputOptions define the comparison colours and display style
• The asyncCaptureLimit and asyncCompareLimit are used to control the
number of threads and memory the tests use.
• "engine": "chrome“ defines that the chrome headless browser will be used.
Configuration Setup
{
"id": "pm",
"viewports": [
{
"label": "phone",
"width": 320,
"height": 1024
},
{
"label": "tablet",
"width": 768,
"height": 1024
},
{
"label": "desktop",
"width": 1268,
"height": 1024
}
],
"onBeforeScript": "chromy/onBefore.js",
"onReadyScript": "chromy/onReady.js",
"scenarios": [
{
……..
}
],
"resembleOutputOptions": {
"errorColor": {
"red": 255,
"green": 0,
"blue": 255
},
"errorType": "movement",
"transparency": 0.3,
"ignoreAntialiasing" : true
},
"asyncCaptureLimit": 25,
"asyncCompareLimit": 400,
"engineFlags": [],
"engine": "chrome",
"report": ["browser","CI"],
"debug": false,
"debugWindow": false
}
26. 25
For scenarios setup there are two key parameters :
• url
• selectors
These define the page the what will be captured on the page. The selectors
used simple CSS selectors to identify elements on the page to capture.
To capture the contents of the <div id=“header”> then the #header is used as a
selector.
If a referenceUrl is specified then this will be used instead of the url when
generating the reference images. This is used when comparing sites.
The hideSelectors parameter is used to define the elements on the page that
should not be shown. This is useful to hide cookie notifications for example that
could obscure capture of components.
Scenario Setup
{
"label": "header",
"url": "http://people-management.local/bb-prototype-
website_example_grid.html",
"selectors": [
"#header"
],
"hideSelectors": [
"#monitor_mq",
".grid",
".visible-grid-btn"
],
"readySelector": ".page-loaded“
},
{
"label": "podcast",
"url": "http://beta.pmdev.co.uk/test/podcast",
"referenceUrl": "http://internal.people-
management.demo.building-blocks.com/bb-prototype-
website_components-podcast.html",
"selectors": [
".podcast-container"
],
"hideSelectors": [
"#monitor_mq",
"#SEStartButton",
"#cookieMsgWrapper2",
".grid",
".visible-grid-btn"
]
}
27. 26
Scenario Setup :
"onReadyScript": "burgerMenuTest.js",
Chromy Script :
module.exports = function (chromy, scenario) {
var clickSelector = scenario.clickSelector;
var postInteractionWait = scenario.postInteractionWait; // selector [str] | ms [int]
if (clickSelector) {
chromy
.wait(clickSelector)
.click(clickSelector)
}
if (postInteractionWait) {
chromy.wait(postInteractionWait);
}
};
Chromy
28. Backstop JS the future …..
27
• Catch Regression
• Allow comparison between DEMO HTML and Website
• Quick to setup
• Easily integrate in to existing HTML build process