The aim of testing is to prevent software failure. Using normal, exceptional and extreme test data as part of a test plan will reduce the prevalence of syntax, logic and execution errors in code.

The new structured data testing tool added these features: Validation for all Google features powered by structured data Support for markup in the JSON-LD syntax, including in dynamic HTML pages ...

Higher; Testing Syntax, execution and logic errors. Programmers often encounter logic, syntax and execution errors and use dry runs, trace tables and breakpoints to resolve errors and finalise code.