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TestOps Infrastructure : Theoretical and Technical Features

The creation of a TestOps infrastructure is a demanding activity. TestOps (or check operations) refers back to the self-discipline of managing the operational elements of testing inside the software program supply lifecycle. On this article, we concentrate on theoretical and technical elements, and talk about some case research to think about.

Creator: Maksim Sarychau, Check Automation Answer Architect and QA Engineering Supervisor at Solvd

Theoretical elements

Within the first a part of this text, we talk about check maintainability based mostly on Object Oriented Programming (OOP) finest practices, methods to hold automation outcomes clear for administration, and different theoretical elements of TestOps infrastructure.

Reaching all platforms

More and more, prospects demand a cross-platform answer. From Internet, Cellular, AI, to gaming consoles, a wider array of purchasers means contemplating all platforms. So as to make your assessments actually built-in, you should use an all-in-one open-source answer known as Carina. Should you choose, you should use any framework you need, although utilizing a extra complicated answer will save money and time.

Testing Maintainability

In relation to check maintainability, you need to adhere to the primary practices and good projecting patterns which might be based mostly on object-oriented programming. Utilizing web page objects for purposeful testing is a trending follow. Nonetheless, these assessments are troublesome to keep up; look outdoors of the ‘proof-of-concept’ facet for a clearer overview.

Professional-tip: use an abstraction of UI for cellular automation with iOS and Android. On this approach, you may reuse supply code with out having to make drastic adjustments to it.

Utilizing web page objects and UI parts must be accomplished as a lot as potential to keep up a transparent construction of assessments while sustaining a hyperlink to enterprise logic. UI parts must be gathered into differing teams: menus, controls, and many others.

UI validations and REST calls permit for secure testing, although this technique requires knowledge parametrization utilizing the next elements:

  • Parametrize assessments from Excel and databases
  • Make the most of many assessments and canopy all area areas
  • Mix REST calls with UI validation for stability

Preserving automation outcomes clear

Managers choose visible representations, so charts and linkable reviews are vital. Observe orthodox approaches, providing visibility throughout improvement/guide QA. Testing from a particular method of check automation engineers, for instance, is just too one-sided to get legible outcomes: visibility throughout groups is important. Give administration what they need: outcomes represented clearly. On this sense, clear visualization is the important thing to all groups understanding automation outcomes.

Equally, concentrate on quick automation outcomes. Ideally, check automation is built-in into CI/CD course of. Visibility is once more vital right here, hold outcomes easy and develop belief. Clarify check procedures correctly, in addition to integration processes. Moreover, make small check suites working in small chunks for readability. Builders choose this method, resulting in an efficient relationship between them and the QA division.

Be certain that guide QA can work together with outcomes. Supply instruments to test assessments outcomes: logs, artifacts, video or screenshots. If assessments commonly fail, clarify why: is it the testing setting? Are there points with Selenium or Appium? As soon as consequence elements are communicated, manually checking assessments might be accomplished by QA engineers, saving time.

Visualizations and reviews permit your QA administration to trace progress, velocity, and productiveness, giving them an opportunity to supply their enter on the method, doubtlessly enhancing time administration.

Full integration into the CI/CD course of

Relying on desire, automation might be scheduled, or guide. Regarding integration into the CI course of, permit your check automation to be trigged on a commit and pull request foundation – depart the chance to start out assessments manually, in addition to common assessments additionally.

With versatile configuration, the AUT setting/execution setting might be chosen. Assessments might be custom-made by selecting an setting, browser, or cellular system.

Software program points, akin to in Selenium, can waste assets. For instance, 50/300 assessments failed, and rerunning the entire regression is futile. Select open-source merchandise that mean you can rerun solely failed assessments or their sequences to collate reviews.

Beneficial open-source instruments:

  • Selenium for internet automation and Appium for cellular
  • For check life-cycle management, use TestNG. It’s extra versatile in comparison with opponents.
  • Maven SureFire Plugin permits for working sure teams of assessments beneath CI to parametrize them.
  • Use Selenoid as a textual content execution setting: it means that you can run assessments in a dockerized setting and separate Docker container, by way of browsers and cellular.
  • For real-time or historic reviews, use RabbitMQ, and Elastic Stack for arching logs and future evaluation.
  • Cellular automation might be run by way of an MCloud system farm. Join these to a server by way of hubs and it may be utilized by guide and automation QA engineers.
  • Open STF is a superb open-source software permitting you to regulate outdoors units – swipe, sort, click on, set up apps.

Instruments and applied sciences for orchestrating infrastructure parts, testing, and steady integration and supply are described on this passage. Ansible is used for automating deployment and configuration, whereas SeleniumGrid or AppiumGrid built-in with Docker containers are used for the testing infrastructure. Kubernetes can be utilized to manage the infrastructure whether it is hosted on platforms like Amazon or Google Cloud. Jenkins is the popular open-source CI/CD software, and pipelines are used to configure and run assessments after a construct.

Sensible method

The second a part of this text discusses the setup course of and emphasizes the significance of sure components for the system to operate appropriately.

Within the technical a part of the article, we concentrate on sensible implementation. Our firm has developed a set of instruments over the previous decade that work properly for our tasks and purchasers. We suggest utilizing instruments that work finest to your particular wants, akin to automation scripts and reporting instruments for visualization. This method has been tried and examined in manufacturing and might be replicated efficiently.

Carina/Zebrunner Logging

Zebrunner is a Java-based internet utility constructed on the Spring Framework, used for aggregating check outcomes from Carina by way of the Zebrunner Listener Agent. The outcomes are displayed in an internet interface that features graphs and interactive dashboards. ZebrunnerLogAppender is a Log4j Appender that publishes logging occasions to RabbitMQ, which might be seen in real-time by way of the Zebrunner internet reporting software.

To entry historic check logs, the Elastic Stack (Elasticsearch and Logstash) is used to retailer the information. A Logstash pipeline is about as much as obtain enter from RabbitMQ and report the information with the corresponding Check Run ID and Check ID in Elasticsearch. This permits customers to retrieve related check logs by forming an HTTP request in Zebrunner.

The method: to assessment check logs later, a pipeline is established in LogStash that receives enter from RabbitMQ. This knowledge within the enter alternate is recognized by a correlation ID consisting of the Testrun ID and Check ID, and it’s recorded into Elastic search. When accessing the Zebrunner internet UI after a sure interval – akin to every week, day, or hour – customers can acquire the related data by offering the Check ID or Check Run ID, querying the Elastic search by way of an HTTP request, and retrieving the required log knowledge. This allows customers to simply entry the context of the information they want.

Logstash Pipeline Configuration

Create a Logstash file and configure the pipeline with enter from RabbitMQ and output to Elastic search. The ELK stack is being utilized in a Docker context. Host is about to “elasticsearch”, it’s additionally a neighborhood host for Logstash, ES and LS are in the identical container.

RabbitMQ configuration:

            	host => "rabbitmq"
            	port => "5672"
            	alternate => "logs"
            	metadata_enabled => true
            	person => ”qps"
            	password=> ”secret"
            	sturdy => true
                subscription_retry_interval_seconds => 5

ELK configuration:

            hosts => ["localhost"]
            index => '%{[@metadata][rabbitmq_properties]
            document_type => 'check'

To entry Elastic Search from an exterior REST consumer, cross-origin request insurance policies in Elastic Search YAML must be adjusted. Set http.cors.enabled: true and specify the allowed hosts or use “*” for requests not tied to an origin host.

Elasticsearch CORS configuration (elasticsearch.yml):

http.cors.enabled : true
http.cors.allow-origin : "*”
http.cors.allow-methods : OPTIONS, HEAD, GET, POST, PUT, DELETE
http.cors.allow-headers : "*"

Let’s speak briefly about streaming video now. Selenoid has helpful plugins: allow VNC and video. With allow VNC, you should use a container to connect with a testing session in real-time and troubleshoot any points by way of a VNC session. That is accomplished by opening a port and connecting by way of a browser or VNC consumer.

Carina/Zebrunner – VNC Streaming (Internet)

To allow VNC assist in a check session, use the enableVNC=true command with a testing framework or Carina itself, which runs Aerokube’s Selenoid container. Nonetheless, Selenoid doesn’t assist accessing this session by way of a safe web-socket protocol by default. To handle this, use NGinX as an entry level from the skin, with Zebrunner or one other reporting software interacting with it by way of a safe protocol. NGinX proxies the site visitors into the setting by way of an unsecured web-socket, utilizing a distant framebuffer protocol as a consumer. This ensures safe interplay with pre-installed certificates for manufacturing environments.

Config makes use of GoGridRouter hub to combination a number of Selenoid cases. GGR distributes requests amongst nodes to run massive check quantities. VNC parameters inform GGR methods to proxy site visitors from VNC level to Selenoid node. NGinX config permits safe socket entry by way of WSS protocol to proxy site visitors by way of VSS to GGR utilizing unsecured protocol.

Selenoid configuration:

<?xml model="1.0"?>
<qa:browsers xmlns:qa="urn:config.gridrouter.qatools.ru">
  <browser title="chrome" defaultVersion="67.0">
   <model quantity="66.0">
 	<area title="stage">
   	<host title=”host" port="4446” vnc="ws://host:4446/vnc"/>

NGinX configuration:


location /vnc {
  	proxy_pass http://ggr_server;
  	proxy_http_version 1.1;
  	proxy_set_header Improve $http_upgrade;
  	proxy_set_header Connection "improve";
  	proxy_set_header Host $http_host;
  	proxy_set_header Entry-Management-Permit-Origin 
  	proxy_set_header X-Actual-IP $remote_addr;
  	proxy_set_header X-Forwarded-For 
  	proxy_set_header X-NginX-Proxy true;

Carina/Zebrunner – VNC Streaming (Cellular)

VNC streaming for cellular units allows interacting by way of an internet interface. To automate cellular testing, create a Docker container with ADB, consisting of Java, Appium and STF.

STF connects to cellular units by way of TCP, so it’s important to moreover set up it which might allow you to proxy-pass the site visitors from a web-socket sort to a TCP-type.

To allow VNC streaming, use the plug enableVNC=true to start out /websockifyproxy. Nonetheless, the unsecured protocol requires NGinX and WSS for safety. Use an RFB consumer to connect with the URL for real-time data on the examined cellular system.

Video Recording

All of the logs are accessible in each real-time and in historic format. Regarding video, a related VNC session is in actual time. Nonetheless, it generally occurs that you simply later analyze the assessments in perspective. It’s worthwhile to test 5–6 failed assessments and watch the incident’s video recording. Each enterprise platform, akin to BrowserStack, data the video so you may see what’s occurring and the the reason why the assessments failed. Allow Video is an ordinary functionality of Selenoid. Which means that Selenoid runs an extra container that proxies all VNC site visitors and creates an mp4 video file.

Video Recording (Internet)

To make a recorded video accessible by way of the online, arrange NGiNX and Selenoid to make use of the identical folder. Use the session ID to correlate recorded periods with assessments. Override the video output variable in Selenoid and switch every little thing within the container “decide/Selenoid/video” to the present host machine listing “/Selenoid/video”.

Selenoid configuration

	network_mode: bridge
	picture: aerokube/selenoid:latest-release
  	- /var/run/docker.sock:/var/run/docker.sock
  	- $PWD/selenoid/:/and many others/selenoid/
  	- $PWD/selenoid/video/:/decide/selenoid/video/
  	- OVERRIDE_VIDEO_OUTPUT_DIR=$PWD/selenoid/video/

NGiNX Configuration:

	picture: nginx
 	- ./selenoid/video:/usr/share/nginx/video
location /video {
    	root   /usr/share/nginx;

NGiNX is about up in a Docker Compose and the Selenoid video quantity is shared internally at person/share/nginx/video. The NGiNX content material requires addressing assets within the /video folder statically.

Video Recording (Cellular)

In Appium 1.22.4, you may report an actual utility testing session on a cellular system or emulator by setting parameters for video decision, bitrate, and offering FTP server credentials. Appium routinely uploads the video to the FTP server when recording stops.

A public Docker picture can be utilized to arrange the FTP server, and NGiNX and FTP level to the identical folder. You possibly can entry the recorded video by utilizing the common scheme host/video/sessionID/mp4, the place SessionID corresponds to the check run. It’s potential to construct an economical TestOps infrastructure utilizing solely open-source merchandise.

Solutions for additional studying

About writer

Maksim Sarychau is a Check Automation Answer Architect and QA Engineering Supervisor at Solvd, Inc. He took his first steps in IT when he was solely 8. He has a grasp diploma in radiophysics & synthetic intelligence, labored as a system administrator, programmer and designer, and after taking a check automation course in 2003, obtained his first job in testing. He’s an expert in Java, Ruby, C#, Node.js and Carina, to call a number of, and has contributed to creating a number of new check automation frameworks.



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