Can I add tests and descriptions in a config block?

dbt has the ability to define node configs in .yml files, in addition to config() blocks and dbt_project.yml. But the reverse isn't always true: there are some things in .yml files that can only be defined there.

Certain properties are special, because:

• They have a unique Jinja rendering context
• They create new project resources
• They don't make sense as hierarchical configuration
• They're older properties that haven't yet been redefined as configs

These properties are:

• description
• tests
• docs
• columns
• quote
• source properties (e.g. loaded_at_field, freshness)
• exposure properties (e.g. type, maturity)
• macro properties (e.g. arguments)

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