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Test Case Design Technique

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Software testing involves creation and execution of the test cases to confirm if all the features, and functionalities of the software are working as expected. The test case design techniques include the planning, creation, and execution of tests. All these improve the effectiveness of the tests and help to detect bugs in the software.

What are Software Test Case Design Techniques?

The test case design techniques describe various ways to generate the test cases. They help to ensure that every functionality of the software is working correctly without any bottlenecks. Let us take an example of an e-commerce application, where only valid users should be able to login.

Test Case Title − This test verifies that only valid users should be able to login to the e-commerce site.

Test Case Design − Verify that only users with valid phone number and email address can register and later login to the e-commerce site.

Test Case Prerequisites − The user possesses an accurate email address, and phone number.

Test Case Assumptions − The user is using a mobile device or desktop to login.

Test Case Steps

Launch any browser.
Open the correct URL.
Click on the Sign Up link.
Complete the sign up process with an email address, and phone number and choosing a username and password.
Get confirmation email on successful sign up.
Again open the same URL used in Step 2.
Click on the login button, and enter the credentials selected in Step 2.

Test Case Expected Results − The user should be able to login successfully.

Types of Software Test Case Design Techniques

The various types of test case design techniques are listed below −

Requirement Based

It is also known as the black box testing technique that validates the features of the software without considering its internal working. It consists of the procedures listed below −

Boundary Value Analysis − In this methodology, the verification is done around the boundary values of the valid and invalid data sets. The behavior of the software at the edge of the equivalence partitions has a higher probability of finding errors.
Equivalence Partitioning − This methodology allows the testers to segregate input data into groups. It reduces the total count of tests without compromising the test coverage.
Decision Table − This methodology allows building of test cases from the decision tables created using various combinations of input data and their outcomes which originate from different situations and use cases.
State Transition Diagram − This methodology is used to test the change in the states of a software using different inputs. If the conditions under which the input are updated, then there are changes to the states of the software.
Use Case Testing − This methodology is focussed on verifying the test scenarios involving the entire software.

Structure Based

It is also known as the white box testing technique that validates the internal working of the software by the developers. It consists of the procedures listed below −

Statement Coverage Testing − This methodology validates every executable line in the program source code at least once.
Decision Coverage Testing − This methodology tests all decision outcomes in the program.
Condition Coverage Testing − This methodology primarily verifies all the conditions in the program source code.
Multiple Condition Testing − This methodology is used to verify different circumstances to get a very good test coverage. It relies on multiple test scripts, hence requires more time for completion.
Path Testing This methodology uses the control flow graph to calculate a group of linearly independent paths. Moreover, the cyclomatic complexity of the code is calculated to obtain the number of the linearly independent paths, and finally the test cases are built from those paths.

Experience Based

It consists of the procedures listed below −

Error Guessing − This methodology is an informal testing where the testers use their knowledge, experience, expertise, and domain understanding to identify potential defects in the software. Those defects may not have been found by the formal test cases or by simply analyzing the requirements.
Exploratory Testing − This methodology is an informal testing technique practiced on the software to determine bugs. It is an unsystematic approach.

Tools Used for Test Case Design Techniques

The various tools used for test case design techniques are listed below −

TestRail
Jira
ALM/HP
Zephyr
TestLink

Advantages of Software Test Case Design Techniques

The advantages of the software test case design techniques are listed below −

The test case design techniques provide a systematic procedure for testing resulting in improving the test coverage, and quality of the software.
The test case design techniques help to identify the complicated use cases, and scenarios. It also allows testing with efficient test data which ultimately helps to validate all the features of the software.
The test case design techniques reduce the probability of finding defects in the production. Thus it increases its reliability, reduces project cost, and enables a very productive form of testing.

Conclusion

This concludes our comprehensive take on the tutorial on Software Test Case Design Technique. Weve started with describing what are software test case design techniques, what are the various types of software test case design techniques, what are the various tools used for test case design techniques, and what are the advantages of software test case design techniques. This equips you with in-depth knowledge of Software Test Case Design Technique. It is wise to keep practicing what youve learned and exploring others relevant to Software Testing to deepen your understanding and expand your horizons.

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