CH05.L08 . Conclusion

Summary

This video script delves into test case design techniques, categorizing them into Black box and White box methods. Black box techniques, like Equivalent Partitioning and Boundary Value Analysis, rely on software specifications without access to internal structures. Decision tables and State transition techniques organize inputs and outputs for effective test case creation. Use case technique utilizes project analysis for function-specific testing. White box techniques, applicable with internal knowledge or source code, include Statement and Decision testing to cover all code paths and decisions. The script emphasizes the importance of understanding software requirements to select the most suitable testing approach.

Takeaways

• 🔍 Black Box Testing Techniques are used when the tester lacks knowledge of the software's internal structure and relies on external specifications.
• 📝 Careful reading of software specifications and requirements is crucial to determine the most suitable testing technique.
• 📊 Equivalent Partitioning is a technique used for creating effective test cases when dealing with a range of data or variables.
• 📈 Boundary Value Analysis complements EP by focusing on the boundaries of data, which is essential for writing test cases.
• 📋 The Decision Table Technique organizes inputs and outputs to assist in writing correct test cases for software with multiple inputs and outputs.
• 🔄 State Transition Technique is used to determine the number of test cases needed for systems with changeable states influenced by events.
• 📌 Use Case Technique applies to test cases creation based on use cases developed during the project analysis stage, focusing on system functions.
• 👁️ White Box Testing Techniques are used when the tester has access to the software's internal structure or source code.
• 📝 Statement Testing aims to execute all lines of code with the least number of test cases possible.
• 🔍 Decision Testing is about writing test cases for all possible code paths, covering both true and false conditions in conditional statements.
• 🔑 The presence of decisions in code, such as 'If', 'Then', 'While', 'Else', is a prerequisite for using Decision Testing.

Q & A

What are the two main types of test case design techniques mentioned in the script?

The two main types of test case design techniques are Black box testing techniques and White box testing techniques.

Why are Black box testing techniques used?

Black box testing techniques are used when the tester does not have access to the internal structure of the software and relies on software specifications.

What is the importance of reading the software specifications and requirements before applying Black box testing techniques?

Reading the software specifications and requirements is crucial to determine which Black box testing technique is most suitable for writing effective test cases.

When is the Equivalent Partitioning technique used in test case design?

The Equivalent Partitioning technique is used when dealing with a range of data sets, numbers, or variables, to write an effective number of test cases.

What is the primary focus of Boundary Value Analysis in test case design?

Boundary Value Analysis focuses on the data boundaries, which are crucial for writing test cases to ensure all edge cases are covered.

What is the purpose of the Decision Table technique in test case design?

The Decision Table technique organizes inputs and outputs to help in writing correct test cases, especially when dealing with multiple inputs and their corresponding outputs.

How does the State Transition technique help in specifying the number of test cases for a system with changeable states?

The State Transition technique helps by specifying the number of test cases needed based on the system's changeable states and the events that affect them.

What is the Use case technique and how is it applied in test case design?

The Use case technique is applied through the use cases created during the project's analysis stage, which helps in specifying the test cases for the system's functions.

When are White box testing techniques applied in test case design?

White box testing techniques are applied when the tester has access to the internal structure or the source code of the software.

What is the goal of Statement testing in White box testing?

The goal of Statement testing is to execute all code lines using the least number of test cases possible.

What is the objective of Decision testing in White box testing?

The objective of Decision testing is to write test cases for all possible code paths, covering the true and false possibilities in the code's decision structures.

Outlines

00:00

📚 Black Box and White Box Testing Techniques

This paragraph discusses the two primary types of testing techniques: Black Box and White Box. Black Box testing is used when the tester lacks knowledge of the software's internal structure and relies on software specifications. It emphasizes the importance of understanding specifications to choose the most effective testing technique. Examples include Equivalent Partitioning for data ranges, Boundary Value Analysis for data boundaries, Decision Table for input-output combinations, State Transition for systems with changeable states, and Use Case for functions defined during project analysis. White Box techniques, used when the tester has access to the internal structure or source code, include Statement Testing to execute all code lines and Decision Testing to cover all code paths with true/false conditions.

Keywords

💡Black box testing

Black box testing is a method of software testing where the tester focuses on the software's functionality without considering its internal structure. It is used when the tester does not have access to the software's code. In the script, this concept is central to the discussion of test case design techniques, emphasizing the importance of relying on software specifications and requirements to determine the most suitable testing approach.

💡Software specifications

Software specifications are detailed descriptions of the features and requirements of a software system. They serve as a blueprint for developers and testers. In the context of the video, carefully reading the software specifications is crucial for selecting the appropriate black box testing techniques and writing effective test cases.

💡Equivalent Partitioning

Equivalent Partitioning is a black box testing technique used to divide the input data of a software system into equivalent classes, reducing the number of test cases needed. The script mentions this technique as a method to write effective test cases when dealing with a range of data sets or variables.

💡Boundary value analysis

Boundary value analysis is a testing technique that focuses on the boundaries of input data rather than the data itself. It is highlighted in the script as an important complement to the Equivalent Partitioning technique, ensuring that test cases cover critical data boundaries.

💡Decision table technique

The Decision table technique is used to organize inputs and outputs for complex software systems with multiple conditions and actions. The script describes this technique as a tool for writing correct test cases by systematically considering various combinations of inputs and their corresponding outputs.

💡State transition

State transition refers to the process of changing from one state to another in response to events. In the video, the State transition technique is mentioned for creating test cases for systems with changeable states, ensuring that all possible state changes are tested.

💡Use case technique

The Use case technique involves applying use cases that were developed during the project's analysis phase to specify test cases for the system's functions. The script explains that this technique is used to define test cases based on the use cases created for the software's intended functionalities.

💡White box techniques

White box techniques are testing methods that require knowledge of the software's internal structure or source code. The script contrasts these with black box techniques, noting that white box testing is used when the tester has access to the code, with Statement testing and Decision testing being specific examples.

💡Statement testing

Statement testing is a white box technique aimed at executing every line of code with the least number of test cases possible. The script mentions this technique as a way to ensure that all parts of the code are tested, which is crucial for identifying potential errors.

💡Decision testing

Decision testing is another white box technique that focuses on writing test cases for all possible outcomes of decisions within the code, such as true and false conditions in if-then-else statements. The script explains that this technique is used to cover all logical paths in the code.

💡Test case design

Test case design is the process of creating a set of test cases intended to verify the functionality of a software system. The script discusses various techniques for designing test cases, emphasizing the importance of selecting the right technique based on the software's specifications and the tester's access to the code.

Highlights

Test case design techniques are divided into two types: Black box and White box testing techniques.

Black box testing is used when the tester lacks knowledge of the software's internal structure and relies on specifications.

Reading specifications and requirements is crucial for selecting the most suitable black box testing technique.

Equivalent Partitioning is applied for data ranges, sets of numbers, or variables to write effective test cases.

Boundary Value Analysis complements EP by focusing on data boundaries for test case creation.

Decision Table technique organizes inputs and outputs to assist in writing correct test cases for multiple inputs and outputs.

State Transition technique helps determine the number of test cases for systems with changeable states influenced by events.

Use Case technique applies use cases from the project analysis stage to specify test cases for system functions.

White box testing is used when the internal structure or source code of the software is available.

Statement testing aims to execute all code lines using the minimum number of test cases.

Decision testing covers all code paths, focusing on possibilities represented by true and false conditions in the code.

Test case design requires understanding the software's specifications and requirements for effective technique selection.

Examples were provided to illustrate when to use each black box testing technique.

Decision Table technique is particularly useful for complex scenarios involving multiple inputs and outputs.

State Transition technique is essential for systems with dynamic states affected by various events.

Use Case technique links project analysis with test case creation for system functionality.

White box testing techniques focus on the software's internal logic and structure for comprehensive testing.

Decision testing is crucial for ensuring all possible code paths are covered by the test cases.

Transcripts

At the end of

the test case design techniques,

lets remember that

the techniques are divided into 2 types.

The first one is the Black box testing techniques,

which you will use if

the tester doesn't have the internal structure

of software and he will depend on

the software specifications.

therefore, we need to read carefully

the specifications and the requirements

of the software, to know

exactly which technique of them

is the most suitable for writing the effective

test cases. We have also applied

different examples, and learned when we

will use each technique.

For example, the Equivalent Partitioning

technique will be used when you have

a range of data,

sets of number or variables

and you need to write the effective

number of test cases.

The Boundary value analysis,which is important

in addition to the EP technique,

because it focuses on the data boundaries

at which we write the test cases.

Regarding, the test combination between

several inputs, software

and several relative outputs

so it time to the Decision table technique,

which organize the inputs and outputs

that help us to write the correct test cases.

While, using the State transition technique,

we were able to specify the number

of test cases we should create for a system

with changeable states according

to some events affecting them.

The Use case technique which

can be applied through the use case

that were made during the analysis stage of the project,

through which we specified the

test cases we would create

for the functions of the system.

finally, the 2 White box techniques

which we will use if we have the internal

structure or the source code of

the software. they are: the Statement testing,

which aims to execute all

the code lines using the less number of

test cases. and the Decision testing

in which we aim to write

the test cases for all the tracks

that cover the possibilities of the code.

the decisions don't appear unless

the code has the possibility (true) &(false)

in case we use (If , then , while , else)