Detox: Superfast E2E React Native UI Testing

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In recent years, React Native has become a very popular technology in the cross-platform mobile application development race, but choosing a UI testing tool for React Native apps might be quite tricky. There are two great UI testing frameworks for React Native apps — Appium and Detox. Appium is widely used for UI testing but Detox is a grey-box, faster and easy to learn tool for the UI testing of React Native apps. In this tutorial, we will set up some Detox tests for a simple, new React Native app.

Detox: End-to-End Mobile UI Testing

As you may have already known, the major problems in the mobile UI testing are slowness and flakiness. Tools like Appium are completely black-box and use client-server architecture which causes flakiness in UI tests. Detox is designed to solve the problem of slowness and flakiness for mobile UI testing. Some of Detox’s great features are:

JavaScript Objects in Depth, Part 1: The Fundamentals

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Introduction

JavaScript has two main data types: primitives and objects. The interesting thing here is that other than the primitive type everything else is an object, including functions. Therefore, if we are really interested in learning JavaScript, then understanding objects should be on the top in the list.

An object can be created with figure brackets ( {...})with an optional list of properties where a property is a key:value pair, where the key is a string and the value can be anything. By anything, we mean it can be a primitive or an object or even a function.

Why Clojure? Four Tech Reasons

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Clojure isn’t a mainstream programming language. But the FreshCode team regularly completes projects with this powerful and convenient solution. That’s why I want to describe technical reasons in which Clojure development matters.

Original published at freshcodeit.com

Why Clojure?

What is the final goal of creating any programming language? From my point of view, it aims to enable writing clear and effective code. Rich Hickey, the author of Clojure, wanted to make written programs simple. This helps to speed up the software development process, as well as reduce the time needed for code understanding, changing, and support.

The Laravel Synchronous Queue

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Using queues for asynchronous processing is one of my favorite tricks for offloading hard work from web servers. When working with Laravel recently I was pleased to find that it supports beanstalkd out of the box. I’ve got opinions about frameworks with Opinions but I did find one thing I really liked in the way Laravel uses queues: the sync queue option that runs your queue synchronously on your development platform so you can develop and debug your work, then switch the queue platform you use later.

It’s quite tricky to debug Laravel "Jobs" as they call the worker code — if errors occur, they don’t show up in the general output. You can use error_log() and see that output, but if there’s a PHP error, you won’t see that error. However you can configure the QUEUE_CONNECTION in .env to be "sync". The sync queue type is not asynchronous at all — instead of putting the job onto your chosen queue backend, it goes right ahead and processes the job in the current thread of execution. This completely defeats the object of using a queue but is a brilliant approach for debugging how the data passes from the dispatching context (where the data is put into the job and onto a queue) to the worker context (where the job comes back off the queue and actually gets processed) and how the job is processed.

Beginner’s Guide to Creating a Maven Plugin

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Maven Project Tutorial

Maven plugins are software components that allow for the reuse of common build logic across multiple projects or modules. In this article, I would like to demonstrate how to build a Maven plugin and test it.

Creating a Maven Plugin Project

This article assumes that you have already installed Maven. In this article, I am going to create a small plugin which creates a zip file for multiple files listed in a directory. Create a Maven project using the command maven-archetype-mojo .

Show the Weather Forecast in a NativeScript With Vue.js iOS and Android Application

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About a week ago I had written a tutorial around using the HERE Weather API in a NativeScript with Angular application. This was an extension to my popular tutorial which focused on strictly Angular with the HERE Weather API. However, if you’re a NativeScript developer, you probably know that Angular isn’t the only way to do business.

In this tutorial, we’re going to explore using the HERE Weather API in NativeScript, but this time use Vue.js and simple JavaScript.

What Is Visual Testing? A Definitive Answer [and Approach]

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What Is Visual Testing?

Visual testing is how you ensure that your app appears to the user as you intended.

In today’s world, in the world of HTML, a web developer create pages that appear on a mix of browsers and operating systems. Because HTML and CSS are standards, front-end developers want to feel comfortable with a ‘write once, run anywhere’ approach to their software. Which also translates to "Let QA sort out the implementation issues." QA is still stuck checking each possible output combination for visual bugs.

Build a Countries List with Telerik UI for WinForms

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RadDomainUpDown in Telerik UI for WinForms is a combination of a text-box and a pair of moving up and down buttons to navigate through a limited selection of options. This control may save you some screen space since it occupies the space needed for a standard text-box. However, in addition, it allows the end user to select one of a variety of several items.

A common use-case is to build an input form for filling personal information. One of the required fields is the nationality. RadDomainUpDown is suitable for introducing the countries options if you don’t want to allocate a lot of space on the form.

Validating Arguments in JavaScript Like a Boss

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In software engineering, we try to discover and eliminate bugs as soon as possible. One of most important heuristics here is validation of input/output on functions and methods. If you are going with TypeScript or Flow, you are fine. But if not? Then we have to manually validate at least the input (arguments). But what would be the best way of doing this?

The first thing that comes to mind is the aproba library. It’s "ridiculously" light-weight and equally popular:

AWS Amplify GraphQL Queries With TypeScript and Hooks

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I’m a big fan of AWS Amplify. I’m also a big fan of TypeScript.

Amplify is not built with TypeScript, and to use it effectively, sometimes you need to give it a little help, especially when it comes to GraphQL. With the advent of hooks, we can create some nice utilities for ourselves that let us leverage the power of TypeScript with our GraphQL queries. Let’s see what that looks like.

Connect to Cloudant Data in Ruby

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The CData ODBC Driver for Cloudant makes it easy to integrate connectivity to live Cloudant data in Ruby. This article shows how to create a simple Ruby app that connects to Cloudant data, executes a query, and displays the results.

Create an ODBC Connection to Cloudant Data

If you have not already, first specify connection properties in an ODBC DSN (data source name). This is the last step of the driver installation. You can use the Microsoft ODBC Data Source Administrator to create and configure ODBC DSNs.

Building Blazor Shared Components

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Blazor has experimental support for shared components. Developers can build application-agnostic Blazor components and, when packed with a Blazor shared components library, these components can be shared between Blazor applications. This blog post shows how to build shared Blazor components.

Prerequisites

This blog post was written when the following prerequisites were valid:

All About Flutter – Differences, Layout Widgets, UI, and Its Future

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What Is Flutter?

While mobile application developers are fed up with cookie cutter apps, Google is here with a new mobile application SDK to help app developers develop speedy and attractive mobile apps. Also, just like Android, Flutter is an open source SDK.

Why Is Flutter Different?

We have known many cross-platform development systems; why is Flutter different?

An Angular PWA From Front-End to Backend: Send/Receive Messages

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This is the third part of the series about the AngularPwaMessenger project. It is a chat system with offline capability. The second part showed how the login process for online and offline works.

This part will be about how to send and receive messages. A message can be sent while offline. It is then stored in the indexed DB and sent when the device is online again.

Access Redshift Data With Entity Framework 6

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Entity Framework is an object-relational mapping framework that can be used to work with data as objects. While you can run the ADO.NET Entity Data Model wizard in Visual Studio to handle generating the Entity Model, this approach, the model-first approach, can put you at a disadvantage if there are changes in your data source or if you want more control over how the entities operate. In this article you will complete the code-first approach to accessing Redshift data using the CData ADO.NET Provider.

  • Open Visual Studio and create a new Windows Form Application. This article uses a C# project with .NET 4.5.
  • Run the command ‘Install-Package EntityFramework’ in the Package Manger Console in Visual Studio to install the latest release of Entity Framework.
  • Modify the App.config file in the project to add a reference to the Redshift Entity Framework 6 assembly and the connection string.To connect to Redshift, set the following:

    Deploying an Angular App on a Google VM Using Bitbucket Pipelines

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    Angular is one of the most widely used JavaScript frameworks. But though the builds are easy, developers face issues when configuring deployments and setting up CI/CD pipelines. This post outlines the steps required to deploy an Angular application to a Google VM using Bitbucket Pipelines.

    What Are Pipelines?

    Bitbucket Pipelines allow developers to configure continuous delivery (in the cloud) of source files to test/production servers. These pipelines are configured to connect to the production server using YAML scripts.

    View Component or Tag Helper?

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    Suppose you are working on an ASP.NET Core web application. To avoid havingn the views and layouts grow massively, you plan to separate some parts of these to independent components. This way you don’t repeat code you wrote once. You find view components and tag helpers, but which one should you use?

    The Difference Between View Components and Tag Helpers

    It’s important to understand what is what before doing any work.

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