Things I learnt the hard way in thirty years of software development

It gives us some idea if things are going right or not, but they lack a view of how the whole is going on — a thing integration tests, which tests how the system as a whole behaves — do better. You can be sure that if a language brings a testing framework — even minimal — in its standard library, the ecosystem around it will have better tests than a language that doesn’t carry a testing framework, no matter how good the external testing frameworks for the language are. If the language comes with its own way of documenting and it comes even with the simplest doc generator, you can be sure that all the language will have a good documentation (not great, but at least good).

Source: blog.juliobiason.net