This session is about the performance testing mistakes which newbies and even experienced performance tester mostly did while doing performance testing
FAQ - why does my code throw a null pointer exception - common reason #1 Rede...Alan Richardson
A common reason for Null Pointer Exceptions in Java is a variable redeclaration instead of instantiation. Learn what that means, how to avoid it, and how to spot it, in this presentation.
Read the full blog post: http://testerhq.com/post/blogs/javafortesters/2017-08-29-faq-null-pointer-exception/
Visit my Java Web Site: http://javafortesters.com
---
# FAQ - why does my code throw a null pointer exception - common reason #1 Redeclaration
- Using `@BeforeClass` or `@Before` can setup data for use in tests
- Any 'variables' we instantiate need to be 'fields' rather than variables
- We want to instantiate them in the setup method rather than redeclare them
---
# Example of the Problem
I know I will use an `Adder` in my test so I create it as a field:
~~~~~~~~
public class WhyCodeThrowsNullPointerExceptionTest {
Adder adder;
~~~~~~~~
I don't want to re-instantiate it each time so I make an `@BeforeClass` method to instantiate it:
~~~~~~~~
@BeforeClass
public static void setupAdder(){
Adder adder = new Adder();
}
~~~~~~~~
**Warning: Error in the above code**
---
# Semantic Error
I just made a Semantic coding error. This won't be caught by a compiler, but it will cause my `@Test` to fail with a Null Pointer Exception.
In the setup method I really wanted to assign a value to the field, instead I created an new variable with the same name.
# In General
- Try to write one test at a time so that if you have a problem it is easier to identify where the problem is
- Try to write working isolated tests and then refactor to a more general solution when you need it - that way, you know it was working, so you just have to work backwards to find out what went wrong
- Try to use automated IDE refactoring rather than move code around manually
- Use the IDE syntax highlighting to help spot any issues
Design patters exist for years in software development. Some developers love them, some think they are useless. But design patters has very clear goals: describe common solutions for common problems, create shared language for community, improve understanding and reuse of existing approaches. Test automation has its own set of problems, so there is a set of helpful design patterns for this area. In this talk I will run through all known patterns and describe them in details with several practical samples.
Testing GraphQL in Your JavaScript Application: From Zero to Hundred PercentRoy Derks
Testing JSX components can be quite tricky, especially if they include GraphQL queries. What if I told you it is possible to both test your GraphQL queries and mutations, while also testing the way they interact with your JSX components? This talk will show how you can push your testing principles to the next level by writing unit tests and integration tests that will use the type system of GraphQL. Not only can you drastically increase your test coverage after this talk, you’ll know for sure that your data is flowing correctly through your application.
This session is about the performance testing mistakes which newbies and even experienced performance tester mostly did while doing performance testing
FAQ - why does my code throw a null pointer exception - common reason #1 Rede...Alan Richardson
A common reason for Null Pointer Exceptions in Java is a variable redeclaration instead of instantiation. Learn what that means, how to avoid it, and how to spot it, in this presentation.
Read the full blog post: http://testerhq.com/post/blogs/javafortesters/2017-08-29-faq-null-pointer-exception/
Visit my Java Web Site: http://javafortesters.com
---
# FAQ - why does my code throw a null pointer exception - common reason #1 Redeclaration
- Using `@BeforeClass` or `@Before` can setup data for use in tests
- Any 'variables' we instantiate need to be 'fields' rather than variables
- We want to instantiate them in the setup method rather than redeclare them
---
# Example of the Problem
I know I will use an `Adder` in my test so I create it as a field:
~~~~~~~~
public class WhyCodeThrowsNullPointerExceptionTest {
Adder adder;
~~~~~~~~
I don't want to re-instantiate it each time so I make an `@BeforeClass` method to instantiate it:
~~~~~~~~
@BeforeClass
public static void setupAdder(){
Adder adder = new Adder();
}
~~~~~~~~
**Warning: Error in the above code**
---
# Semantic Error
I just made a Semantic coding error. This won't be caught by a compiler, but it will cause my `@Test` to fail with a Null Pointer Exception.
In the setup method I really wanted to assign a value to the field, instead I created an new variable with the same name.
# In General
- Try to write one test at a time so that if you have a problem it is easier to identify where the problem is
- Try to write working isolated tests and then refactor to a more general solution when you need it - that way, you know it was working, so you just have to work backwards to find out what went wrong
- Try to use automated IDE refactoring rather than move code around manually
- Use the IDE syntax highlighting to help spot any issues
Design patters exist for years in software development. Some developers love them, some think they are useless. But design patters has very clear goals: describe common solutions for common problems, create shared language for community, improve understanding and reuse of existing approaches. Test automation has its own set of problems, so there is a set of helpful design patterns for this area. In this talk I will run through all known patterns and describe them in details with several practical samples.
Testing GraphQL in Your JavaScript Application: From Zero to Hundred PercentRoy Derks
Testing JSX components can be quite tricky, especially if they include GraphQL queries. What if I told you it is possible to both test your GraphQL queries and mutations, while also testing the way they interact with your JSX components? This talk will show how you can push your testing principles to the next level by writing unit tests and integration tests that will use the type system of GraphQL. Not only can you drastically increase your test coverage after this talk, you’ll know for sure that your data is flowing correctly through your application.
Solving Flaky Automated Tests Using Machine LearningJames Farrier
Learn different ways of handling flaky tests/unreliable automation. We will go through the different processes that companies like Microsoft, Google and Facebook have used to stop Flaky tests from breaking the build and how you can implement similar techniques and processes.
Aistė Stikliutė - Testing in continuous deliveryAgile Lietuva
Continuous delivery makes it possible to develop and deploy software within hours instead of months or weeks or days. But what about testing? Testing is not fast. Which means you will have to cut corners, but add additional measures to compensate. Many companies market their continuous delivery practices, so others can see how cool they are, but also learn from their experiences. In this talk I will go through some highlights and things that work well and not so well in these example continuous delivery implementations, and then will concentrate on testing patterns, approaches and little hints that I have learnt both from these examples and from my own experience.
Automating Strategically or Tactically when TestingAlan Richardson
"Test Automation" can be viewed as strategic or tactical.
This presentation describes reasons for making this distinction and how you know if you are working strategically or tactically when you automate as part of your test approach.
Automated Agility?! Let's Talk Truly Agile Testing - Adam Howard - AgileNZ 2017AgileNZ Conference
The move towards agility is an acceptance that we operate in an uncertain world. We can’t predict what will change in the future so we’ve evolved our practices toward flexibility, instead of attempting precognition. But have we evolved every practice?
About Adam Howard:
Adam Howard is the Test Practice Manager at Trade Me in Wellington, New Zealand. He is passionate about helping to evolve the way testing is perceived and performed. A regular speaker at Meetups and conferences in NZ and internationally, Adam also helps organise local WeTest Workshops and is chief design and layout editor for Testing Trapeze, a bi-monthly testing magazine. He also writes about testing on his blog and occasionally manages to be concise enough to tweet as @adammhoward.
Webinar: Estrategias para optimizar los costos de testingFederico Toledo
Webinar en colaboración de QAminds y Abstracta Tech Talks.
Abstract: En estos días de lockdown y recesión económica muchas empresas están buscando formas de recortar costos por acá y por allá, y por supuesto, el testing es de las cosas que se suele recortar primero. El problema de recortar presupuesto y recursos para testing queda reflejado en el viejo dicho "pan para hoy hambre para mañana". En esta charla quiero compartir algunas estrategias con las que puedes optimizar costos de testing sin comprometer la calidad del sistema o producto que estás desarrollando.
Solving Flaky Automated Tests Using Machine LearningJames Farrier
Learn different ways of handling flaky tests/unreliable automation. We will go through the different processes that companies like Microsoft, Google and Facebook have used to stop Flaky tests from breaking the build and how you can implement similar techniques and processes.
Aistė Stikliutė - Testing in continuous deliveryAgile Lietuva
Continuous delivery makes it possible to develop and deploy software within hours instead of months or weeks or days. But what about testing? Testing is not fast. Which means you will have to cut corners, but add additional measures to compensate. Many companies market their continuous delivery practices, so others can see how cool they are, but also learn from their experiences. In this talk I will go through some highlights and things that work well and not so well in these example continuous delivery implementations, and then will concentrate on testing patterns, approaches and little hints that I have learnt both from these examples and from my own experience.
Automating Strategically or Tactically when TestingAlan Richardson
"Test Automation" can be viewed as strategic or tactical.
This presentation describes reasons for making this distinction and how you know if you are working strategically or tactically when you automate as part of your test approach.
Automated Agility?! Let's Talk Truly Agile Testing - Adam Howard - AgileNZ 2017AgileNZ Conference
The move towards agility is an acceptance that we operate in an uncertain world. We can’t predict what will change in the future so we’ve evolved our practices toward flexibility, instead of attempting precognition. But have we evolved every practice?
About Adam Howard:
Adam Howard is the Test Practice Manager at Trade Me in Wellington, New Zealand. He is passionate about helping to evolve the way testing is perceived and performed. A regular speaker at Meetups and conferences in NZ and internationally, Adam also helps organise local WeTest Workshops and is chief design and layout editor for Testing Trapeze, a bi-monthly testing magazine. He also writes about testing on his blog and occasionally manages to be concise enough to tweet as @adammhoward.
Webinar: Estrategias para optimizar los costos de testingFederico Toledo
Webinar en colaboración de QAminds y Abstracta Tech Talks.
Abstract: En estos días de lockdown y recesión económica muchas empresas están buscando formas de recortar costos por acá y por allá, y por supuesto, el testing es de las cosas que se suele recortar primero. El problema de recortar presupuesto y recursos para testing queda reflejado en el viejo dicho "pan para hoy hambre para mañana". En esta charla quiero compartir algunas estrategias con las que puedes optimizar costos de testing sin comprometer la calidad del sistema o producto que estás desarrollando.
This slideshow describes how a teacher can use the Internet and it's various services such as blogs, podcasts, screencasts to enable better teaching and learning.
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
The publishing industry has been selling digital audiobooks and ebooks for over a decade and has found its groove. What’s changed? What has stayed the same? Where do we go from here? Join a group of leading sales peers from across the industry for a conversation about the lessons learned since the popularization of digital books, best practices, digital book supply chain management, and more.
Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
Let's dive deeper into the world of ODC! Ricardo Alves (OutSystems) will join us to tell all about the new Data Fabric. After that, Sezen de Bruijn (OutSystems) will get into the details on how to best design a sturdy architecture within ODC.
GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
State of ICS and IoT Cyber Threat Landscape Report 2024 previewPrayukth K V
The IoT and OT threat landscape report has been prepared by the Threat Research Team at Sectrio using data from Sectrio, cyber threat intelligence farming facilities spread across over 85 cities around the world. In addition, Sectrio also runs AI-based advanced threat and payload engagement facilities that serve as sinks to attract and engage sophisticated threat actors, and newer malware including new variants and latent threats that are at an earlier stage of development.
The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
Connector Corner: Automate dynamic content and events by pushing a buttonDianaGray10
Here is something new! In our next Connector Corner webinar, we will demonstrate how you can use a single workflow to:
Create a campaign using Mailchimp with merge tags/fields
Send an interactive Slack channel message (using buttons)
Have the message received by managers and peers along with a test email for review
But there’s more:
In a second workflow supporting the same use case, you’ll see:
Your campaign sent to target colleagues for approval
If the “Approve” button is clicked, a Jira/Zendesk ticket is created for the marketing design team
But—if the “Reject” button is pushed, colleagues will be alerted via Slack message
Join us to learn more about this new, human-in-the-loop capability, brought to you by Integration Service connectors.
And...
Speakers:
Akshay Agnihotri, Product Manager
Charlie Greenberg, Host
"Impact of front-end architecture on development cost", Viktor TurskyiFwdays
I have heard many times that architecture is not important for the front-end. Also, many times I have seen how developers implement features on the front-end just following the standard rules for a framework and think that this is enough to successfully launch the project, and then the project fails. How to prevent this and what approach to choose? I have launched dozens of complex projects and during the talk we will analyze which approaches have worked for me and which have not.
Slack (or Teams) Automation for Bonterra Impact Management (fka Social Soluti...Jeffrey Haguewood
Sidekick Solutions uses Bonterra Impact Management (fka Social Solutions Apricot) and automation solutions to integrate data for business workflows.
We believe integration and automation are essential to user experience and the promise of efficient work through technology. Automation is the critical ingredient to realizing that full vision. We develop integration products and services for Bonterra Case Management software to support the deployment of automations for a variety of use cases.
This video focuses on the notifications, alerts, and approval requests using Slack for Bonterra Impact Management. The solutions covered in this webinar can also be deployed for Microsoft Teams.
Interested in deploying notification automations for Bonterra Impact Management? Contact us at sales@sidekicksolutionsllc.com to discuss next steps.
Kubernetes & AI - Beauty and the Beast !?! @KCD Istanbul 2024Tobias Schneck
As AI technology is pushing into IT I was wondering myself, as an “infrastructure container kubernetes guy”, how get this fancy AI technology get managed from an infrastructure operational view? Is it possible to apply our lovely cloud native principals as well? What benefit’s both technologies could bring to each other?
Let me take this questions and provide you a short journey through existing deployment models and use cases for AI software. On practical examples, we discuss what cloud/on-premise strategy we may need for applying it to our own infrastructure to get it to work from an enterprise perspective. I want to give an overview about infrastructure requirements and technologies, what could be beneficial or limiting your AI use cases in an enterprise environment. An interactive Demo will give you some insides, what approaches I got already working for real.
Essentials of Automations: Optimizing FME Workflows with ParametersSafe Software
Are you looking to streamline your workflows and boost your projects’ efficiency? Do you find yourself searching for ways to add flexibility and control over your FME workflows? If so, you’re in the right place.
Join us for an insightful dive into the world of FME parameters, a critical element in optimizing workflow efficiency. This webinar marks the beginning of our three-part “Essentials of Automation” series. This first webinar is designed to equip you with the knowledge and skills to utilize parameters effectively: enhancing the flexibility, maintainability, and user control of your FME projects.
Here’s what you’ll gain:
- Essentials of FME Parameters: Understand the pivotal role of parameters, including Reader/Writer, Transformer, User, and FME Flow categories. Discover how they are the key to unlocking automation and optimization within your workflows.
- Practical Applications in FME Form: Delve into key user parameter types including choice, connections, and file URLs. Allow users to control how a workflow runs, making your workflows more reusable. Learn to import values and deliver the best user experience for your workflows while enhancing accuracy.
- Optimization Strategies in FME Flow: Explore the creation and strategic deployment of parameters in FME Flow, including the use of deployment and geometry parameters, to maximize workflow efficiency.
- Pro Tips for Success: Gain insights on parameterizing connections and leveraging new features like Conditional Visibility for clarity and simplicity.
We’ll wrap up with a glimpse into future webinars, followed by a Q&A session to address your specific questions surrounding this topic.
Don’t miss this opportunity to elevate your FME expertise and drive your projects to new heights of efficiency.
Builder.ai Founder Sachin Dev Duggal's Strategic Approach to Create an Innova...Ramesh Iyer
In today's fast-changing business world, Companies that adapt and embrace new ideas often need help to keep up with the competition. However, fostering a culture of innovation takes much work. It takes vision, leadership and willingness to take risks in the right proportion. Sachin Dev Duggal, co-founder of Builder.ai, has perfected the art of this balance, creating a company culture where creativity and growth are nurtured at each stage.
5. What will happen if we do not ?
We may get an Exception which is unrelated
We may get an incorrect result
We may create an object which will fail at a totally
different and unrelated time
6. What should be checked ?
Constructors
Public, protected, package methods
7. When not to check ?
If the check is very expensive
a method which expects a sorted list
If the check will be done implicitly in the
computation
sorting automatically checks for comparable
instances
Possible to omit checks in private methods
