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Blog Post #1 JUnit 5 Testing

In class, we have been learning about testing with Junit 5 and doing assignments related to it. After watching the video for the advanced part of the assignment,  I decided that I wanted to research further into the topic for my first blog post. So, what is Junit? In a short answer, JUnit is a Java open sources unit testing framework that is used to write and run repeatable automated tests. JUnit 5 Is the updated version of the highly popular testing library that is Junit 4 which I’m sure you all have heard of it. Junit 5 was released in 2017 that adds good use for Java 8 features. In fact, JUnit 5 requires Java 8 JDK or higher to work.

While researching a few of the key differences between the two versions are Junit 5 is composed of 3 sub-projects JUnit Platform, JUnit Jupiter, and JUnit Vintage. The Assertions and Annotations have been changed, and most importantly Junit 5 adds the support of the lambda expression in which we went over in class. One of the blogs I read recommends doing this example,  which I found quite helpful and easy to understand. The code below is just a conversion between Fahrenheit to Celsius and Junit to test it. The author breaks each part down into subsections which made It easier to follow along. I was also, curious about how Junit 5 worked in the Gradle so I followed tutorials to see how the build systems provide supports to the new feature. I highly recommend watching the video that I have provided; it explains everything you need to know about Junit 5 and the architecture behind It.

 

Resources: 

https://www.youtube.com/watch?v=flpmSXVTqBI 

https://www.parasoft.com/junit-tutorial-setting-up-writing-and-running-java-unit-tests/

From the blog Derin's CS Journey by and used with permission of the author. All other rights reserved by the author.

Apprenticeship Patterns Chapter 1 and Chapter 2-6 Introductions

Software Craftsmanship raises some of the thorniest and most sensitive questions about software development and comes to the controversial conclusion of finding answers in a system that has thrived for hundreds of years: technology. Software Technology is a systematic expression of the author’s ideas and attempts to answer the difficult questions that have been plaguing the software industry. How should we restructure the process of building software, such as we want it to be effective?

 

The author of Software Craftsmanship has been emphasizing the role of the craftsman in the project. Craftsmen sounds is a very old word, the craftsman in other industries is a what kind of person I want to say, must be done in the field of a good man, I explain the below mentioned software process artisans do what kind of person, craftsman is mentioned there is a very rich in the process of software development experience, after years of development, products are well received by customers, has a certain reputation, they can submit a robust, high quality of the user application. A good craftsman can make or break a project. This shows that the human factor plays a very important role in the development of the project. Someone I have been thinking without learning software engineering in software development has a very important role in understanding of software engineering make me realize software can also like assembly line engineering, development mode, people do not development process, mainly the development process of software engineering control, a relatively fixed process, as long as people do some mechanical work can complete this project. In the current environment, software engineering ideas are still dominant, but software technology ideas also have their base of support, such as workers in the open-source community.

 

Software technology of the main pressure is a very important role in the whole project, software process is very strict requirements of the team, the team first small number, no more than 15 people, the general team is three people, but for the team of personal ability request, the other teams also are in high demand of health, a more stable team, team members can develop the tacit understanding.

 

The book Software Craftsmanship gives us a good development model, but many projects in the current environment are developed using software engineering ideas. Why is this? In my analysis, the main reason is that software technology requires too much of the team, and there are too few excellent craftsmen, so it is difficult for many companies to organize such an efficient team. Right now, the idea of software craftsmanship can only be seen in the open-source community, where many of the true craftsmen are gathered.

From the blog haorusong by and used with permission of the author. All other rights reserved by the author.

Apprenticeship Patterns

We are at the point of life that in a few years we all be fully working adults. It is crazy to think that 4 years of college just flew by so fast. This semester the software capstone class will be the most interesting and challenging I believe. When it comes to reading a book, I have no patience at all, but after reading the introduction, something about this book: Apprenticeship Patterns: Guidance for the Aspiring Software Craftsman is making me want to read it appropriately. It is possible to be that I can relate to this book on so many levels and it is relevant to me. After just reading the introduction I feel like it changed the way I think and view my profession.

All the patterns in the book are interesting and powerful in a way that we can adapt and combine these patterns in many ways and situations. One of the patterns that stood out to me the most was “Be the worst” from chapter four. The author has explained the concept very well in which it states that “Surround yourself with developers who are better than you. Find a stronger team where you are the weakest member and have room to grow” This statement Is very interesting and when I think deep into it, I believe that being worst in a team at least for me is a motivation to work hard and grow to improve. The goal is not to stay the weakest but instead work my way from the bottom to the top.

The author also talked about the risk factor that associates with being worst in the team including dragging the team down, good teams do not tolerate you, and the risk of being fired. Although I do agree that in situations all these scenarios could be possible but on the positive side this can motivate a person to improve and build a mindset that helps the individual. I do not think I disagree with any aspects of the pattern but, these patterns and the whole book have certainly changed the way I think about a certain aspect of software development. I realized that I need to work even harder and push myself to the limits for me to get where I want in life.

 

 

 

From the blog Derin's CS Journey by and used with permission of the author. All other rights reserved by the author.

My first post for CS 443

 

Welcome to Haoru’s Blog

Hello Everyone! This is my first post for CS 443.

From the blog haorusong by and used with permission of the author. All other rights reserved by the author.

First post for CS 448

 

Welcome to Haoru’s Blog

Hello Everyone! This is my first post for 448.

From the blog haorusong by and used with permission of the author. All other rights reserved by the author.

Introductory Blog Post CS-443 & CS-448

Hello Everyone, I’m Derin Sabu, this is my introductory blog post for CS-443 and CS-448. Excited and looking forward to learning new concepts. It won’t be easy, but it is worth it.  Good Luck!

From the blog Derin's CS Journey by and used with permission of the author. All other rights reserved by the author.

What is the difference between a software framework and a software architecture？

Software frameworks are reusable “semi-finished” software for domains (such as ERP, computing, etc.) that implement common parts of the domain and provide well-defined points of variability to ensure flexibility and extensibility. In other words, the software framework is the softwarenation of the results of domain analysis and the template for the final application in the domain.

With the expansion of software scale, wide application and the development of software reuse technology, the software reuse based on subroutine and class has a lot of shortcomings:

(1) The library of the subroutine is becoming more and more huge, which makes it difficult for its users to master

(2) Most classes are too small to do all the useful work by themselves

It is for these reasons that a set of classes (modules) are considered as a whole in reuse, resulting in a software framework. The software framework contains at least the following components:

(1) A series of modules to complete the calculation become components

(2) The relationship between components and the interaction mechanism

(3) A series of variable points (hot spots, or adjustment points)

(4) Behavior adjustment mechanism of variable point

Developers through the software framework behavior adjustment mechanism, peculiar to the general application domain software module bound to the variable point of a software framework, and got the final application system, this process is called software example of a software framework, the existence of software framework allows developers will be the main energy on the development system of the module, so as to improve software productivity and quality.

The behavior adjustment mechanism of the software framework refers to how to adjust the variable part of the framework for the specific application and how to add the method and rules of the specific application module at the variable point.

Ii. Software architecture

Software architecture is a sketch of a system. The objects described by software architecture are abstract components that directly constitute the system. The wires between the components describe the communication between the components explicitly and in relative detail.

Software architecture, by definition, is divided into two camps of ‘constituent’ and ‘decision-maker’, which are described as follows:

The componentized view of software architecture is that the system is described as computing components and their interactions. It has two very obvious characteristics:

Focus on the object of architectural practice — software, with the software itself as the object of description.

This paper analyzes the composition of the software, and shows that the software is not a whole in the sense of “atom”, but a whole composed of different parts connected through a specific interface, which is very important for software development.

Decision-makers believe that software architecture involves a series of decisions, mainly including:

Organization of software systems

Choose the structural elements that make up the system, the interfaces between them, and the behavior that these elements exhibit when they cooperate with each other

How do you combine these elements so that they gradually synthesize into larger subsystems?

The architectural style used to guide the organization of the system: these elements and their interfaces, collaborations, and combinations

Software architecture is concerned not only with the structure and behavior of the software itself, but also with other features: usage, functionality, performance, elasticity, reuse, understandability, economy, and technical constraints and trade-offs.

Personal understanding: When software engineering has a certain scale, software development does not exist in the form of data structure + algorithm, but “divide and conquer” software based on many factors such as technical choices and user needs. The main task of the architect is to divide the software into different modules and define the interfaces between modules.

Sources:

https://softwareengineering.stackexchange.com/questions/229415/difference-between-an-architecture-and-a-framework#:~:text=An%20architecture%20is%20the%20the,that’s%20designed%20to%20be%20extended.&text=Frameworks%20are%20specifically%20designed%20to%20be%20built%20on%20or%20extended.

From the blog haorusong by and used with permission of the author. All other rights reserved by the author.

The must knows of Architectural patterns (12/10/2020)

When thinking about going into the job market for a computer scientist there is a common theme. This includes big enterprises needing systems or designed to be produced in order to benefit you and their operations. Although before even starting this we need to understand Software architecture. An architectural pattern, in general, is considered to be a reusable solution to a commonly occurring problem. within the Architectural pattern, we tend to see a total of 10 different patterns that make up the basic framework. One of these simple frameworks is a layered pattern. this pattern can be used to structure programs that will be decomposed into groups of sub-categories. with this particular pattern, we see it being used in desktop applications and E-commerce web applications. the second pattern we see is a client-server pattern which is made up of a server and multiple clients. This will allow server components which will allow assisting multiple clients among a broad range of devices.  you will be able to find this pattern most frequently in Emails, documents, sharing, and banking. The third pattern that mostly relates to a big data analyst would be the master-slave pattern. The master-slave pattern is able to distribute the work among identical slave components, which will ultimately compute the final results from the results which then gets fed to the slaves to return. this is mainly used in datasets and databases in replication. the database is usually considered an authoritative source and usually synchronized between the databases of slaves and masters.  In inorder for this to work correctly we need to have them connected to a bus in a computer system in a sense of branches where we see that the master usually has 3 slave nodes. The 4th design pattern we usually see is the Pipe filter pattern. A pipe filter pattern can be used to structure systems that produce and process a stream of data. Each of the said processes is enclosed within the filter component, which allows the data to be processed through pipes. you can think of these pipes to be as a buffer so the data can be synchronized in the dataset if new data arrives. As well you may think of the architectural pattern as a pattern which recurring a solution to a recurring problem. in most cases, you are able to figure out which classes we have as well as how they will interact with each other to see how they will be implemented in a sequence of systems. usually, an Architectural pattern has the most impact in regard to the code which will then impact the whole application usually horizontally or vertically. 

From the blog Nicholas Dudo by and used with permission of the author. All other rights reserved by the author.

Why are software Frame Works important (12/10/2020)

 As we continue to live out life on earth we as people have to go through trials and tribulations that build from the very basic of things. We also tend to take inventions that have been long in the tooth and retool or re event them. When looking at a software Framework you can consider it to be the same idea or concept. A software framework is considered to be a platform used as a foundation in order to develop different sorts of applications. As well when it comes to software frameworks we are allowed to have a structure or the base program to develop specific programs without having to start from scratch. There two different types of frameworks, opinionated and unopinionated. An opinionated framework is considered to be more of an enforced approach in the sense that the developer is allowed to choose the application structure while the users are able to enforce conventions in regard to the framework itself. while on the other hand, we have an unopinionated framework which is considered to be less strict and considered to be flexible for other less experienced developers to use. Unopinionated is considered to be more simplistic in the sense of not having to have a prescribed method to solve problems while still having flexible tools that could be used to solve problems in a variety of ways. With a framework, you’re allowed a model, view, and controller. A model for a framework is the application for the data. in specific, this focuses on the web application is dealing with a user, video, picture, or comment. The view of a framework on the other hand is considered to be the user interface. You can consider it to be like the computer screen where whenever you make a change the screen will always show the updates or changes that have been made. Then the final piece is the controller where it handles the input such as clicks or different browser inputs. In a sense, you’re allowed to think of a framework as a house where it’s the foundation of the house. frameworks allow you to establish a sense of order to the code when you allow it to give it an application. They can be highly customizable to developers because in the sense it is Skelton code where then you can fill in whatever you want to make the program work for your needs in particular. another piece of the puzzle is that it allows you to integrate libraries which allows having a useful methodology from different sites. 

From the blog Nicholas Dudo by and used with permission of the author. All other rights reserved by the author.

What is software architecture design?

I. Concept of system architecture

By Edward Crawley, Bruce Cameron, And Daniel Selva co-authored SYSTEM ARCHITECTURE: Strategy and Product Development for Complex Systems. In the book, the word “system” is defined in this way: a system is a set of entities and their relationships, whose functions are greater than the sum of their respective functions.

In other words, the function has to be 1+1>2, which is called emergence. For example, a pile of bricks and wood cannot provide shelter from the wind and rain, but they can form a warm house. The function of the house is greater than the sum of the functions of the pile of materials, so the house is a system.

Now that you know what a system is, let’s look at what a system architecture does:

1) Determine the form and function of the system. To put it bluntly, it’s analyzing requirements.

2) Determine the entities, forms, and functions of the entities in the system. It’s dividing up the system. To accomplish this task, the book proposes some points of attention: identifying potential entities, focusing on important entities, abstracting entities, and defining the boundaries of the system and the environment in which the system resides.

3) Determine the relationship between entities. This includes identifying relationships between internal entities and entities located at boundaries and defining the form and function of those relationships. That is to define internal and external interfaces.

4) Forecast emergence. The prediction of final function realization, performance realization, and also the prediction of system failure, is the emergence of non-expectations.

II. The book also explains the architect’s function from another perspective:

1) Disambiguation. That is, the architecture is designed so that you don’t have a vague understanding of the requirements.

2) Define the system concept. Put forward the overall solution, define the key terms in the system, define the key measurement criteria.

3) Design decomposition. The key to breaking down the system into entities and the relationships between entities is to control the complexity of the system and not overscale it.

It can be seen that the system architecture is a step between the requirements and the implementation, which not only analyzes the requirements but also proposes a feasible implementation scheme.

The system architecture is suitable for a team composed of one or a few people because many people will lead to insufficient integrity of thinking. If multiple people work together, the best form is also to divide up the hierarchy, with a hierarchy of units to be completed by a single person. This requires a high level of knowledge, synthesis, analysis, and imagination on the part of the architect.

Sources:

Click to access Preface.pdf

From the blog haorusong by and used with permission of the author. All other rights reserved by the author.