A test case comprises of components, which describe the expected response, action and input for determining whether a feature of a product is functioning properly. A test case is regarded as a set of specific instructions about how to validate a specific test target or test objective. As the test case is executed, it will determine if the expected behavior of the system is satisfying the requirements of the end user or not.
Writing an effective test case is recognized to be a skill. You will be capable of learning about how to write test cases, from the knowledge and experience of the application or software under test.
The above resources provide basics about the test writing process. Here are the levels of the process of test case writing:
Here, you will be writing the basic cases from the user documentation and the available specification.
It is recognized to be the practical stage in which writing the test cases depend on the system and functional flow of the software.
In this stage, the test cases are grouped after which a certain test procedure is written. The test procedure refers to a group of different small cases, with the maximum number of ten.
This level involves the automation of the project. It reduces the interaction of human with the system and the Quality assurance focuses on the latest updated functionalities for testing.
Benefits of writing test cases
The ultimate goal of writing the test cases is the validation of test coverage of a specific product. If you are working in any CMMI organization, it is a prerequisite to follow the test standards more closely. Writing the test cases introduces few kinds of standardization and reducing the ad-hoc approach in testing.
Tips for writing test cases
Writing test cases and test scenarios is considered to be a crucial part of software testing. Here are certain factors, you need to consider while writing the test cases:
Test cases needs to be updated and revised regularly
The world is changing continuously and the same is applicable for software. The changes in software requirements have an effect on the test cases directly. If any of the requirements are changed, it is a prerequisite to update the test cases. It is not just the change in the requirement which might lead to update and revision of test cases.
At the time of execution of the test cases, several ideas might arise and it is essential to identify the sub-conditions of every test case. All the above factors lead to an update of test case, and it might result in addition of the latest test cases.
Test cases are distributed among a plethora of testers
There is no situation in which only one tester tests all the test cases. There are a plethora of testers who will be testing various modules of single software. Hence, the test cases are divided among a bunch of testers, in accordance with the specific areas of the software which is under test. Few test cases which are related to the integration of software are known to be executed by a plethora of testers whereas a bunch of test cases can be executed just one tester.
Test cases are more prone to batching and clustering
Test cases are known to belong to a singular test scenario which demands the execution in the form of a group or in certain sequence. There might be specific prerequisites of a test case in which the execution of other test cases are required before running the specific test cases. In accordance with the business logic of the Application Under Test, a singular test case might lead to different test conditions whereas a singular test condition comprises of a bunch of test cases.
Test cases tend to be inter-dependent on each other
It is recognized to be a crucial trait of the test cases, denoting that they are interdependent on another. Whether it is a medium scale application or a large application with the most complicated business logic, this tendency is known to be more visible.
The clearest area of the software or application in which the behavior is observed is regarded as the interoperability between various applications or modules. Whenever the various modules of a single or multiple applications are known to be interdependent, the similar behavior gets reflected in the test cases.
In test driven development environment, the test cases need to be distributed among the developers
An important factor, you need to keep in mind that test cases are not used by software testers only. In normal case, if an error is fixed by the software developers, they need to use the test case for fixing the problem. In a similar way, if the test driven development needs to be adopted, it is a prerequisite that the developers need to use the test cases for creating the logic as well as covering the different scenarios in the code, which are addressed by the test cases.
If you are a software tester, you are well aware of the fact that creating a well written test document happens to be a challenging task. If you have been asked to create a test documentation, you should never begin it in an ad-hoc way. It is essential to gain an understanding of the objectives of writing the test cases, before working on the documentation procedures.
You however need to keep in mind that the test cases are lucid and clear. It needs to be written in a way which offers ease to the testers for conducting the complete testing by following the defined steps in every test. Besides this, the test case document should comprise of a plethora of test cases which are required for offering complete test coverage. For instance, you need to aim at testing every possible scenario which might occur within the software application. To launch an error free product in the market, the testers offering software testing services should be capable of writing well defined test cases.