ISTQB FOUNDATION 4.0 | Tutorial 30 | Equivalence Partition | Black Box Test Techniques | CTFL

Summary

This tutorial delves into the ISTQB Foundation Level certification, focusing on Chapter 4.2's blackbox test techniques, specifically equivalence partitioning (EP). The instructor explains EP's definition, its purpose in minimizing test cases, and its application based on detailed requirements. Through examples, viewers learn to create partitions, understand valid and invalid ranges, and tackle sample questions. The tutorial aims to clarify misconceptions and build confidence in using EP for effective test case design.

Takeaways

• 📘 The tutorial is focused on the ISTQB Foundation level certification, specifically discussing test analysis and design in Chapter 4.
• 🔍 The segment delves into blackbox testing techniques, emphasizing the importance of detailed requirements for their application.
• 💡 Equivalence Partitioning (EP) is introduced as a blackbox testing technique that divides inputs into ranges or classes, assuming similar behavior within each class.
• 📝 EP aims to minimize the number of test cases by selecting one test case from each partition, based on the principle that elements within a partition are expected to behave the same.
• 🔑 The definition of Equivalence Partitioning is highlighted, explaining how inputs are categorized into partitions where each element is assumed to produce the same output.
• 🚫 The script points out a drawback of EP where configurations and settings may not be identical across roles or designations, which can affect the reliability of the technique.
• 📉 The tutorial provides examples to illustrate how to create partitions and apply EP, including a scenario involving leave approval based on job roles.
• 📝 The importance of correctly identifying valid and invalid partitions is stressed, as this determines the effectiveness of the test cases derived from EP.
• 🔢 The script uses an example of an integer field with a specified range to demonstrate the creation of partitions and the selection of test cases.
• 📚 It is emphasized that understanding the context and mathematical principles is crucial for correctly applying EP and solving related questions.
• 📉 An advanced example involving tax calculation is presented to show the application of EP in a complex scenario, highlighting the process of creating slabs and identifying equivalence classes.

Q & A

What is the main topic of this tutorial?

The main topic of this tutorial is 'Equivalence Partitioning', a blackbox test technique discussed in the context of the ISTQB Foundation Level certification.

What is the purpose of blackbox test techniques?

The purpose of blackbox test techniques is to derive the minimum number of test cases needed to test a particular scenario based on detailed requirements without considering the internal workings of the system.

What is Equivalence Partitioning (EP) and how does it help in testing?

Equivalence Partitioning (EP) is a technique that divides inputs into ranges or classes, where all elements within a range are expected to behave the same way. It helps in minimizing the number of test cases by ensuring that one test case is taken from each partition.

Why might blackbox test techniques not be applicable in some projects?

Blackbox test techniques might not be applicable in some projects if they do not have detailed requirements, in which case experience-based test techniques might be more suitable.

What is the drawback of using Equivalence Partitioning?

The drawback of using Equivalence Partitioning is that the configuration and settings may not be exactly the same for all roles or designations within a partition, which could lead to the assumption that testing one element will cover all being incorrect.

How does the tutorial explain the creation of partitions in Equivalence Partitioning?

The tutorial explains the creation of partitions by using examples such as leave approval scenarios and integer field value ranges, emphasizing the importance of understanding the context and requirements to create valid partitions.

What is the significance of the term 'equivalence class' in the context of Equivalence Partitioning?

In the context of Equivalence Partitioning, an 'equivalence class' refers to the ranges or sets of values that are grouped together and expected to behave the same way under test conditions.

How does the tutorial handle the question about an integer field with values between 1 to 15?

The tutorial handles the question by creating three partitions: less than one, 1 to 15, and 16 and above, and explains that three test cases are needed for maximum coverage using Equivalence Partitioning.

What is the importance of understanding the difference between 'less than' and 'less than or equal to' when creating partitions?

Understanding the difference between 'less than' and 'less than or equal to' is crucial when creating partitions because it determines the correct range of values included in each partition, which affects the accuracy of the test cases.

How does the tutorial address the complexity of questions in Equivalence Partitioning?

The tutorial addresses the complexity of questions by providing an advanced level question related to tax calculation, demonstrating how to create partitions for different tax slabs and apply Equivalence Partitioning to determine which numbers fall into the same equivalence class.

What advice does the tutorial give for those who find Equivalence Partitioning confusing?

The tutorial advises those who find Equivalence Partitioning confusing to rewind the video and watch it from the beginning to gain a complete understanding and confidence in applying the technique correctly.