Basic principles of testing and assessing the language skills based on cefr

Chapter II. Testing and assessing in CEFR
The Chapter II is about testing and assessing in CEFR, what language skills should be tested and assessed. Language testing is a broad category of testing that assesses aspects of a person's ability to understand or communicate in a particular language. Language testing is used for a variety of purposes. In academic settings, language testing can assess a student's current abilities or progress for the purposes of academic placement. In professional settings, language testing can determine whether a candidate has the language skills needed for a job. Whatever the context, language assessments can effectively measure a person's language abilities.
Forms of Language Testing.
When you take an English test, you get a score. Often, you'll also get some indication of what that score means, expressed as an English level or label, for example "beginner" or "advanced". There are many different English leveling systems in use around the world, and an even wider variety of English tests, which have implicit or explicit leveling systems built into their scoring. Some English levelling schemes are built into a particular English test, while others are theoretical frameworks without any associated test.
The CEFR, Common European Framework of Reference for Languages, is one of many frameworks that describe your language proficiency. There are several frameworks with similar aims including the American Council on the Teaching of Foreign Languages Proficiency Guidelines ACTFL, the Canadian Language Benchmarks CLB, and the Interagency Language Roundtable scale ILR.
While the CEFR is a European scale and specifically designed to apply to any European language, it is now becoming a worldwide standard framework for language abilities, especially European languages, including English. The CEFR is not tied to any specific language test - and most standardized language tests now provide CEFR level equivalents.

2.1. Types of testing and assessing