YiXu Zhang

YiXu Zhang


Maintaining End-To-End Quality With Visual Testing

Testing is a critical part of any developer’s workflow. It helps us to ensure that our project is going to maintain a high level of quality, as well as prevent any pesky bugs from getting out into the wild.

But often automated tests can be a pain to manage. Between an endless amount of code to make sure you’re providing full coverage and dealing with the fragile nature of front-end tests — where a simple selector change can completely break an end-to-end workflow — it can sometimes feel like an uphill battle.

By adding automated visual testing, we can eliminate those flaky tests, leveling up our testing pipelines providing that coverage (and more) by taking advantage of smart image comparisons using screenshots of our website or app.

Before we dive into visual testing, let’s take a minute to refresh ourselves on the different types of automated testing and how they fit together. We’ll then talk about what exactly visual testing is and how it can provide you another level of testing coverage for your project.

A Quick Look At Some Of The Types Of Automated Testing

Automated testing is an interesting part of the development cycle. Some clients or stakeholders are able to clearly see the value they provide, but others would prefer any development time spent on pure feature development.

This can sometimes be counterintuitive, where the goal of automated testing is to protect the business or prevent the team from having to spend time fixing bugs in the first place. Writing solid automated tests can prevent major financial losses! It’s ultimately a risk that some are more willing to take than others.

Luckily, that value isn’t always hard to sell, and when we are afforded the time to focus on quality automated tests, we have a variety of options for how to tackle those tests like unit testing, integration testing, end-to-end testing, and visual testing (which can also provide extended coverage for the first three).

When applied with the strengths of each type of test, we’re able to spend more time writing tests that can actually help protect our work and save our customers’ frustration.

Let’s take a look at what some of these testing strategies look like in practice.

#testing #web-development #webdev

Maintaining End-To-End Quality With Visual Testing
Tamia  Walter

Tamia Walter


Testing Microservices Applications

The shift towards microservices and modular applications makes testing more important and more challenging at the same time. You have to make sure that the microservices running in containers perform well and as intended, but you can no longer rely on conventional testing strategies to get the job done.

This is where new testing approaches are needed. Testing your microservices applications require the right approach, a suitable set of tools, and immense attention to details. This article will guide you through the process of testing your microservices and talk about the challenges you will have to overcome along the way. Let’s get started, shall we?

A Brave New World

Traditionally, testing a monolith application meant configuring a test environment and setting up all of the application components in a way that matched the production environment. It took time to set up the testing environment, and there were a lot of complexities around the process.

Testing also requires the application to run in full. It is not possible to test monolith apps on a per-component basis, mainly because there is usually a base code that ties everything together, and the app is designed to run as a complete app to work properly.

Microservices running in containers offer one particular advantage: universal compatibility. You don’t have to match the testing environment with the deployment architecture exactly, and you can get away with testing individual components rather than the full app in some situations.

Of course, you will have to embrace the new cloud-native approach across the pipeline. Rather than creating critical dependencies between microservices, you need to treat each one as a semi-independent module.

The only monolith or centralized portion of the application is the database, but this too is an easy challenge to overcome. As long as you have a persistent database running on your test environment, you can perform tests at any time.

Keep in mind that there are additional things to focus on when testing microservices.

  • Microservices rely on network communications to talk to each other, so network reliability and requirements must be part of the testing.
  • Automation and infrastructure elements are now added as codes, and you have to make sure that they also run properly when microservices are pushed through the pipeline
  • While containerization is universal, you still have to pay attention to specific dependencies and create a testing strategy that allows for those dependencies to be included

Test containers are the method of choice for many developers. Unlike monolith apps, which lets you use stubs and mocks for testing, microservices need to be tested in test containers. Many CI/CD pipelines actually integrate production microservices as part of the testing process.

Contract Testing as an Approach

As mentioned before, there are many ways to test microservices effectively, but the one approach that developers now use reliably is contract testing. Loosely coupled microservices can be tested in an effective and efficient way using contract testing, mainly because this testing approach focuses on contracts; in other words, it focuses on how components or microservices communicate with each other.

Syntax and semantics construct how components communicate with each other. By defining syntax and semantics in a standardized way and testing microservices based on their ability to generate the right message formats and meet behavioral expectations, you can rest assured knowing that the microservices will behave as intended when deployed.

Ways to Test Microservices

It is easy to fall into the trap of making testing microservices complicated, but there are ways to avoid this problem. Testing microservices doesn’t have to be complicated at all when you have the right strategy in place.

There are several ways to test microservices too, including:

  • Unit testing: Which allows developers to test microservices in a granular way. It doesn’t limit testing to individual microservices, but rather allows developers to take a more granular approach such as testing individual features or runtimes.
  • Integration testing: Which handles the testing of microservices in an interactive way. Microservices still need to work with each other when they are deployed, and integration testing is a key process in making sure that they do.
  • End-to-end testing: Which⁠—as the name suggests⁠—tests microservices as a complete app. This type of testing enables the testing of features, UI, communications, and other components that construct the app.

What’s important to note is the fact that these testing approaches allow for asynchronous testing. After all, asynchronous development is what makes developing microservices very appealing in the first place. By allowing for asynchronous testing, you can also make sure that components or microservices can be updated independently to one another.

#blog #microservices #testing #caylent #contract testing #end-to-end testing #hoverfly #integration testing #microservices #microservices architecture #pact #testing #unit testing #vagrant #vcr

Testing Microservices Applications
Aarna Davis

Aarna Davis


Top Software Testing/ QA Company | Software Quality Assurance Services

We are a top-rated software quality assurance & testing company leveraging our potential to profound expertise in delivering quality tested applications to businesses.

In the past 16 years, we have delivered over 4200 quality-assured software to a global clientele catering to various industries such as healthcare, adtechs, eLearning, and more.

Planning to outsource software QA services? Or would you like to hire an offshore software testing team?

Visit: https://www.valuecoders.com/software-quality-assurance-testing-services-company

#software quality assurance testing services #software quality assurance services #quality assurance testing services #quality assurance software testing company #quality assurance software testing

Top Software Testing/ QA Company | Software Quality Assurance Services
Mikel  Okuneva

Mikel Okuneva


Where To Learn Test Programming — July 2020 Edition

What do you do when you have lots of free time on your hands? Why not learn test programming strategies and approaches?

When you’re looking for places to learn test programming, Test Automation University has you covered. From API testing through visual validation, you can hone your skills and learn new approaches on TAU.

We introduced five new TAU courses from April through June, and each of them can help you expand your knowledge, learn a new approach, and improve your craft as a test automation engineer. They are:

These courses add to the other three courses we introduced in January through March 2020:

  • IntelliJ for Test Automation Engineers (3 hrs 41 min)
  • Cucumber with JavaScript (1 hr 22 min)
  • Python Programming (2 hrs)

Each of these courses can give you a new set of skills.

Let’s look at each in a little detail.

Mobile Automation With Appium in JavaScript

Orane Findley teaches Mobile Automation with Appium in JavaScript. Orane walks through all the basics of Appium, starting with what it is and where it runs.


“Appium is an open-source tool for automating native, web, and hybrid applications on different platforms.”

In the introduction, Orane describes the course parts:

  • Setup and Dependencies — installing Appium and setting up your first project
  • Working with elements by finding them, sending values, clicking, and submitting
  • Creating sessions, changing screen orientations, and taking screenshots
  • Timing, including TimeOuts and Implicit Waits
  • Collecting attributes and data from an element
  • Selecting and using element states
  • Reviewing everything to make it all make sense

The first chapter, broken into five parts, gets your system ready for the rest of the course. You’ll download and install a Java Developer Kit, a stable version of Node.js, Android Studio and Emulator (for a mobile device emulator), Visual Studio Code for an IDE, Appium Server, and a sample Appium Android Package Kit. If you get into trouble, you can use the Test Automation University Slack channel to get help from Orane. Each subchapter contains the links to get to the proper software. Finally, Orane has you customize your configuration for the course project.

Chapter 2 deals with elements and screen interactions for your app. You can find elements on the page, interact with those elements, and scroll the page to make other elements visible. Orane breaks the chapter into three distinct subchapters so you can become competent with each part of finding, scrolling, and interacting with the app. The quiz comes at the end of the third subchapter.

The remaining chapters each deal with specific bullets listed above: sessions and screen capture, timing, element attributes, and using element states. The final summary chapter ensures you have internalized the key takeaways from the course. Each of these chapters includes its quiz.

When you complete this course successfully, you will have both a certificate of completion and the code infrastructure available on your system to start testing mobile apps using Appium.

Selenium WebDriver With Python

Andrew Knight, who blogs as The Automation Panda, teaches the course on Selenium WebDriver with Python. As Andrew points out, Python has become a popular language for test automation. If you don’t know Python at all, he points you to Jess Ingrassellino’s great course, Python for Test Programming, also on Test Automation University.


In the first chapter, Andrew has you write your first test. Not in Python, but Gherkin. If you have never used Gherkin syntax, it helps you structure your tests in pseudocode that you can translate into any language of your choice. Andrew points out that it’s important to write your test steps before you write test code — and Gherkin makes this process straightforward.

first test case

The second chapter goes through setting up a pytest, the test framework Andrew uses. He assumes you already have Python 3.8 installed. Depending on your machine, you may need to do some work (Macs come with Python 2.7.16 installed, which is old and won’t work. Andrew also goes through the pip package manager to install pipenv. He gives you a GitHub link to his test code for the project. And, finally, he creates a test using the Gherkin codes as comments to show you how a test runs in pytest.

In the third chapter, you set up Selenium Webdriver to work with specific browsers, then create your test fixture in the pytest. Andrew reminds you to download the appropriate browser driver for the browser you want to test — for example, chromedriver to drive Chrome and geckodriver to drive Firefox. Once you use pipenv to install Selenium, you begin your test fixture. One thing to remember is to call an explicit quit for your webdriver after a test.

Chapter 4 goes through page objects, and how you abstract page object details to simplify your test structure. Chapter 5 goes through element locator structures and how to use these in Python. And, in Chapter 6, Andrew goes through some common webdriver calls and how to use them in your tests. These first six chapters cover the basics of testing with Python and Selenium.

Now that you have the basics down, the final three chapters review some advanced ideas: testing with multiple browsers, handling race conditions, and running your tests in parallel. This course gives you specific skills around Python and Selenium on top of what you can get from the Python for Test Programming course.

#tutorial #performance #testing #automation #test automation #automated testing #visual testing #visual testing best practices #testing tutorial

Where To Learn Test Programming — July 2020 Edition

Top Security Penetration Testing Companies

Cybercrime is one of the world’s fastest-growing threats, with malicious actors constantly elaborating their methods of undetectable intrusion. According to Verizon’s Business 2020 Data Breach Investigations report, there has been a 100% increase in web app breaches, and stolen credentials were used in more than 80% of these cases. These statistics are worrying for many businesses that actively move their processes to the cloud and deal heavily with customers’ personal data.

Under these circumstances, companies need to run regular automated and manual tests to determine weak spots in their infrastructure, software, network and physical perimeter security. One of the most efficient testing methods is security penetration testing, or pentesting.

Pentesting is a benign hacking attempt, manual or automated, to break into the system and uncover its vulnerabilities before actual cyber criminals do it. This method is directed at testing the system security controls for their real-world effectiveness. It involves such stages as data collection, threat modeling, vulnerability scans, penetration tests, and so on.

To get proactive with their cyber security protection, many businesses cooperate with professional security testing companies that are able to comprehensively check the system, identify risks, fix vulnerabilities, and stay one step ahead of potential hackers.

The ranking criteria for security testing companies

When asking a professional software testing company to check your system’s security, in most cases you need to grant them access to sensitive information. For this reason, it’s important to choose a reliable company with an exceptional reputation, which will become your trusted partner.

Unsurprisingly, the market of security penetration testing companies is overwhelmingly crowded. To narrow down your search, we have analyzed hundreds of testing companies and compiled the list of top testing professionals. We have applied the following criteria:

  • Pentesting expertise
  • Portfolio
  • Software QA experience
  • Market penetration
  • Online reviews

As a result, we’ve picked 30 skilled security testing companies and rated them accordingly.

1. a1qa

a1qa is a software testing company from Lakewood, CO, that has delivered over 1,500 successful projects and established 10 Centers of Excellence during their 17 years of operation. It has partnered with more than 500 companies, from smaller businesses to Fortune 500 giants. The company’s prominent customers include adidas, Kaspersky Lab, SAP, Yandex, Forex Club, and more.

a1qa specializes in delivering full-cycle QA and testing services, including comprehensive security penetration testing. Its expertise covers testing of web apps such as portals, ecommerce, media and e-learning platforms, games and online casinos, and line-of-business testing, such as CRM, collaboration, document management, and financial systems. The company also runs a specialized security testing lab.

2. QA Mentor

Founded in New York in 2010, QA Mentor has managed to establish a strong global presence with 12 testing centers around the world. Its team consists of 300 certified QA professionals that have successfully completed over 870 projects, including the ones for Amazon, eBay, Bosch, HTC, and more. The company offers more than 30 testing services, with cyber security penetration testing among them.

QA Mentor is recognized as a top software testing company by Clutch, GoodFirms, and Gartner.

3. UnderDefense

UnderDefense is a certified computer and network security company that was established in New York in 2016. It provides a wide range of testing services, with a special focus on security penetration testing. The company’s certified security testing team has performed hundreds of penetration tests, including compliance-specific tests, app and wireless network penetration testing, and social engineering security testing. UnderDefense has been repeatedly awarded by Clutch.

#testing #software-testing #security-testing #penetration-testing #top-software-testing-companies #software-testing-companies #good-company #code-quality

Top Security Penetration Testing Companies
Mikel  Okuneva

Mikel Okuneva


Mutation Testing Systems: Improving the Quality of Tests

Professionally, I label myself as a developer, although I don’t like labels very much, and I prefer to say that the reason for my work is: to create quality software. But what is quality software? I like to define it as follows:

Quality software is that which meets the user’s needs

efficiently and without errors.

I could add more adjectives, go into detail why needs and not requirements… but for me, that would be the definition. However, it’s difficult to get quality software if it’s not written with quality code.

Quality Software → Quality Code

Fortunately, developers are not alone in this task. There are tools for static code analysis (Checkstyle, PMD, FindBugs, SonarQube…) and different recommendations for good practices (personally I would highlight Clean Code and The Pragmatic Programmer). And there among proposals, acronyms, =and metrics, there’s no developer that doesn’t directly associate the term quality with the term testing (right?)

Quality code → Quality tests

Testing: the Path to Quality

Tests are as important to the health of a project as the production code is.

Clean Code. Chapter 9: Unit Tests

There are several types of tests (unit, integration, acceptance…). The most widespread are unit tests and integration tests. With them you get a certain perception of security, since although we do not know if the code does what it should, at least it does what it says.

But is this so? Paradoxically, this practice consists of generating more code. So we continue programming, but who says this code does what it says? That is, who watches over the quality of the tests? Again another association of terms: quality tests are those that offer a high % of code coverage.

Quality tests → High % coverage of our code

A higher percentage of code coverage gives better tests and more reliable code. This is nothing new. If I talk from my personal experience, a few years ago (back in the early 2000s) the minimum % coverage requirement was part of the delivery specifications of some projects. “This deliverable must have a battery of tests that ensure a minimum of 70% code coverage”, as a synonym of error-free code and proven quality in at least 70% of the code.

Taking as an example an application to check the hours (or part hours) worked, let’s imagine that we are developing a method that, given a worker and a day, checks the status of the worker’s time sheets on that day (whether or not he has done the required hours, if he has done extra time…).



public DayStatusSummary getDayStatusSummaryForWorkerAndDay(String workerUserName, LocalDate date) {

  DayStatusSummary status = new DayStatusSummary();



List worklogsForDay = worklogRepository.findByUsernameAndDate(workerUserName, date);

  int totalDuration = 0;

for (Worklog worklog : worklogsForDay) {

    totalDuration = totalDuration + worklog.getDuration();


  if (totalDuration == 8) {


  if (totalDuration > 8) {



if (totalDuration < 8) {



  return status;


Let's see an example of tests that we submitted at the time:



public void get_status_summary_for_worker_and_day() {

reportsService.getDayStatusSummaryForWorkerAndDay(“USU”, LocalDate.now());




public void calculates_the_status_based_on_worker_and_date_worklogs() {

  List<Worklog> partes = new ArrayList<Worklog>();

Worklog wl = new Worklog();






LocalDate fecha = LocalDate.now();

  reportsService.getDayStatusSummaryForWorkerAndDay("USU", fecha);

Mockito.verify(worklogRepository).findByUsernameAndDate(“USU”, fecha);


We configured [JaCoCo](https://www.eclemma.org/jacoco/) to get the test coverage report and the result is as follows.

![Work time reports](https://dzone.com/storage/temp/13690332-01jacocoreport.png)

We have a coverage of 92% of lines and 87% of branches: objective met. But...if you look: the first test will (almost) never fail because it always ends with `assert true`, the second is a bit “more complete” because at least it verifies that the hours (or part hours) are retrieved...

If you want to try all this then download the code from [Github](https://github.com/wearearima/time-report-app/tree/feature/01_tests_for_project_requirements).

Well, this was my reality, and I am very much afraid that it was THE reality of that time in many projects (and who knows if in some of today). The projects met the code coverage requirements, which was far from having quality software. 

It’s true that the example I have given is extreme, but it is real. In my opinion, the problem is in the focus: everything has been turned around, and the tests are created as a mere tool to fulfill one of the requirements of the project.

#test #software developent #software quality #mutation testing #coverage #test quality #pitest

Mutation Testing Systems: Improving the Quality of Tests