What are the principles and strategies of software testing?

Testing methodology is the collection of technical means or tools to solve a problem.

Software testing strategy refers to how methods are selected and applied to solve specific problems.

Software testing has many methods equivalence classes, boundary values, statement coverage, conditional coverage, path coverage, scenario method, top-down & bottom-up integration method and so on. When you master and understand these methods, how to apply to the actual project. Need to develop a test strategy, what time in the test project, what tasks need to use which or which methods or which tools, how to organize to solve the completion, this is the strategy.

For example: a test project in the unit testing phase of the technical review method (code review), in the integration phase of the sandwich method, in the system testing phase of the scenario method, in the testing of functionality for the selection of appropriate black-box testing methods to design test cases; in unit and integration testing, the selection of appropriate white-box methods to design test cases; in the performance-related testing, the selection of appropriate test tools and so on. appropriate testing tools and so on, this is the test strategy.

Their scope is not in terms of size, nor is it an inclusive relationship. Testing involves a lot of methods, the strategy is based on the project needs from the method set to select the appropriate technical methods, they are reasonably organized to complete the test task; test strategy can guide the smooth progress of the test work.