What is System Testing?
In this system is checked and tested based on the risks and requirement specifications, business processes, and use cases. The testing is carried out from the user’s point of view. It is most often the final round of tests to verify that the software to be delivered meets the specification and its purpose and it may also find as many defects as possible. It is the type of black-box testing.
System testing requires test environment, control version of the software, test cases, and test data where the test environment corresponds to the production environment in order to minimize the risk of environment-specific failures not being found by testing. It also assesses the user-experience during the testing.
Followings incorporated in System Testing
Both functional and non-functional requirements of the system where non-functional tests include performance, compatibility, and reliability. Certain incomplete or undocumented requirements are also incorporated for testing at this level. The tests with different input data get executed to check the application is returning the expected outputs.
Objectives of System Testing
- To test the complete integrated applications including external components to check how components interact with one another and with the system as a whole. This is also called End to End testing.
- To verify the system by providing different input and check for desired outputs.
- To test the user’s experience with the application.
Different types of System testing
- Usability Testing
- Performance Testing
- Regression Testing
- Security Testing
- Recovery Testing
- Functional Testing
System Testing Process:
System Testing is performed in the following steps:
Test Environment Setup: In the test environment setup, a platform is built with software and network configured upon which the test cases are supposed to get executed. The configuration setup is done based on the need of the application under test. Setting up a right test environment will ultimately ensure software testing success otherwise it leads to depriving cost and time.
Create Test Case: Test cases are generated at a system level to determine if the system works as per the expected behavior. Test cases are written are supposed to verify the functionality of the software and use cases as well as it also includes negative scenarios and boundary conditions.
Create Test Data: Test data are generated with which the test cases need to be executed. Test data is generated both for testing the positive scenarios as well as negative scenarios. Test data is generally developed either through a manual way (which actually consumes a lot of time) or with the help of an automated test data generation tool.
Execute Test Case: The test case execution is the next step after designing test data and test cases. The test cases are executed in the designed testing environment. Test cases are executed based on priority.
Defect Reporting: With the execution of test cases, defects are identified in the system. Any deviation from the expected result marks the test case as ‘Fail’ and the defect is raised. Testcase is marked as ‘blocked’ if it is not possible to execute them due to defect.
Regression Testing: It is carried as a part of the testing process and performed each time code is changed and a software update is about to be released. Risk-based testing is also carried out at this phase in which the critical functionality of the application is tested in the first phase.
Defect Fixing: In this step, a fix is provided for the defect to test with a new software build released.
Retest: The defects which are fixed are verified and the corresponding failed test cases are executed again. If the defect exists while re-testing, it is marked as open, and then the cycle continues. Learn the defect life cycle.
Advantages of System Testing
- It verifies the system against the business, functional and non-functional requirements of the end-users.
- It helps in getting maximum bugs fixes before acceptance testing.
- It helps in increasing the confidence level of the team in the product before it goes for release.
Disadvantages of System Testing
- System testing starts only after all the components are ready and integration testing is completed, thus the cost of fixing bugs is higher.
- It is difficult to localize the bug as the entire system is participating in the testing.