Skip to main content

How did I start practising BDD?


In the beginning days, I have practiced TDD (Test Driven Development) using JUnit, I approached that I should test methods belong to a class. For example:

I have a class with some methods:

public class A{
 public void method1(){

 }

 public void method2(){

 }
}

And then, I wrote some test methods to check the corresponding ones, for example:

public class ATest{
 @Test
 public void testMethod1(){
  ....
  assertTrue(...);
  .....
  assertEquals(...);
 }

 @Test
 public void testMethod2(){
 }
}

After that, I know that a test method (ex: testMethod1) should just only test one thing, so I decided to write more methods for each case. It looks like the following:

@Test
public void testMethod1_When_Case1(){
 ....
 assertTrue(...);
}

@Test
public void testMethod1_When_Case2(){
 ....
 assertEquals(...);
}

However, it was not a really good approach because it seems that I just focused on test the functionality of the method of the class. With the TDD approach, I knew that I should test the behaviors of a class, not the methods that belong to this class. Because we all know the class's behaviors have represented the behaviors of our system.

Therefore, I would like to turn to a behavior testing approach; and BDD (behavior-driven development) is my response. Here is it:

- From the requirements, I call them are user stories in Agile. Something likes:
As a [Role]
I want [Feature]
So that I receive [Value]
I define some acceptance tests in order to know what exactly their values are. These acceptance tests have represented the behaviors of my system. Somethings likes:
Given [Context]
When [Event Occurs]
Then  [Outcome]
- From the acceptance tests, I started to build a class that implements the behaviors. With TDD and BDD  approach together, I start writing test code first. For example:

@Test
public void shouldReceiveOrDoSomethingWhenEvent1Occurs(){
}

@Test
public void shouldReceiveOrDoSomethingWhenEvent2Occurs(){
}

Yeah, that was all. Now, I follow this approach and I have a test case that represented the behavior of a class, not only the test for a method as previously.

References:
[1]. http://dannorth.net/introducing-bdd/
[2]. http://www.ryangreenhall.com/articles/bdd-by-example.html

Comments

Popular posts from this blog

[Snippet] CSS - Child element overlap parent

I searched from somewhere and found that a lot of people says a basic concept for implementing this feature looks like below: HTML code: <div id="parent">  <div id="child">  </div> </div> And, CSS: #parent{   position: relative;   overflow:hidden; } #child{   position: absolute;   top: -1;   right: -1px; } However, I had a lot of grand-parents in my case and the above code didn't work. Therefore, I needed an alternative. I presumed that my app uses Boostrap and AngularJs, maybe some CSS from them affects mine. I didn't know exactly the problem, but I believed when all CSS is loaded into my browser, I could completely handle it. www.tom-collinson.com I tried to create an example to investigated this problem by Fiddle . Accidentally, I just changed: position: parent; to position: static; for one of parents -> the problem is solved. Look at my code: <div class="modal-body dn-placeholder-parent-positi...

Coders are NERDS | Learning English with Podcast

Let's learn three English vocabulary words based on real-life context through a humorous video about the life of software coders, especially at big tech companies when they work from home. Credit to Joma Tech. 🤓

The HelloWorld example of JSF 2.2 with Myfaces

I just did by myself create a very simple app "HelloWorld" of JSF 2.2 with a concrete implementation Myfaces that we can use it later on for our further JSF trying out. I attached the source code link at the end part. Just follow these steps below: 1. Create a Maven project in Eclipse (Kepler) with a simple Java web application archetype "maven-archetype-webapp". Maven should be the best choice for managing the dependencies , so far. JSF is a web framework that is the reason why I chose the mentioned archetype for my example. 2. Import dependencies for JSF implementation - Myfaces (v2.2.10) into file pom.xml . The following code that is easy to find from  http://mvnrepository.com/  with key words "myfaces". <dependency> <groupId>org.apache.myfaces.core</groupId> <artifactId>myfaces-api</artifactId> <version>2.2.10</version> </dependency> <dependency> <groupId>org.apache.myfaces.core<...

Styling Sort Icons Using Font Awesome for Primefaces' Data Table

So far, Primefaces has used image sprites for displaying the sort icons. This leads to a problem if we want to make a different style for these icons; for example, I would make the icon "arrow up" more blurry at the first time the table loading because I want to highlight the icon "arrow down". I found a way that I can replace these icons with Font Awesome icons. We will use "CSS Pseudo-classes" to achieve it. The hardest thing here is that we should handle displaying icons in different cases. There is a case both "arrow up" and "arrow down" showing and other case is only one of these icons is shown. .ui-sortable-column-icon.ui-icon.ui-icon-carat-2-n-s { background-image: none; margin-left: 5px; font-size: 1.1666em; position: relative; } .ui-sortable-column-icon.ui-icon.ui-icon-carat-2-n-s:not(.ui-icon-triangle-1-s)::before { content: "\f106"; font-family: "FontAwesome"; position: ...

A Template for Software Engineering Standards

Software engineering standard template A well-structured standard acts as a blueprint that guides engineers in their daily tasks and long-term goals. Below, I will outline a template for creating a comprehensive software engineering standard. Header The header serves as the document's identifier. It contains the following: Authors : The people who have contributed to the creation of the standard. Created Date : The date when the document was initially created. Version : The version of the standard. It is typically updated with significant changes. Status : The current status of the document, whether it's in draft, in-review, or official. Next Review Date : The date when the standard will be reviewed for relevancy and accuracy. Table of Contents A table of contents provides an overview of what the document contains, making it easier for readers to navigate through the document. Body The body of the standard comprises: Values : The core beliefs that guide the decision-maki...