Testing is important because the existence of errors or bugs in software is inevitable. The testers should not only find the errors, but also know how the specific bug occurred. The two goals in detecting errors are risk measurement and confidence building. This article is about increasing the effectiveness of testing through strategies and through certain methodologies.
The test manager should write down the goals before starting the testing process so that he can actually be compared with the goals set at the end of the test. Traditional software methodologies and practices are taken into account when drafting the test strategies for the re-engineering program.
Testing considerations depend on the type of re-engineering process the organization uses and also the type of migration.
For example, let’s say a product needs to be migrated to the cloud for re-engineering purposes. The product requires outdated and new functional tests and additionally requires the following tests
Because it is cloud environment, security testing is important
Data migration also requires scalability testing
Performance and load testing
Test strategy plays an essential role in the implementation of the test program. Given the business risk, critical systems and huge investments, it is important to design a strategy for the test phase. The best way to do this is to identify the threats and failure rate and then develop a strategy. Testing is not a one-time activity. Applications must be tested throughout their life cycle. Every development or improvement, upgrade or migration must be extensively tested.
There are 2 types of testing strategies to follow
Product enhancement does not change existing operating specifications and systems, so that the old system and the redesigned system are functionally compatible.
This type of system would mean that the functionality remains the same from the user’s point of view, but the re-engineering helps to improve the legacy system.
- Reverse Engineering: After studying the system through available documentation, resources, market research, an internal development team etc., the reverse engineering process is required to know the reason for a bug. First, the process goes through the existing test plans and then analyzes with the old test plans to improve test coverage and output results
- Migration: According to business requirements, the old system can then be migrated to the new one
- Test execution: After migration, the test plans are executed and the functional results are compared with the results of the pre-migration phase
Product improvement: The old functionalities and old business functions are retained in order to implement new requirements or business functions.
- Reverse Engineering:After studying the system through available documentation, resources, market research, an internal development team etc., the reverse engineering process is required to know the reason for a bug. The analyzed business need is collected and documented. Later, depending on the functionality, the existing test plans can be used to keep the old functionalities and the full test lifecycle is followed if the new functionalities are to be added.
- Migration: New requirements require functional and non-functional test planning to be done and old test plans to be improved.
- Test execution: The outdated system results are compared with a new system to monitor the system status.
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