It is possible to check compliance to coding standards on both source code and unit tests code.
To monitor the compliance to coding standards, add the Issues and Technical Debt widget to your dashboard:
The Technical Debt is the effort in days to fix all the issues. The technical debt can be broken down by characteristic (Technical Debt Pyramid widget).
Use the differential views to monitor new issues.
You can set your coding standards (active coding rules, severity, etc.) through the Quality Profiles administration page.