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MSTEST0009: TestCleanup method should have valid layout

  • Article
Property Value
Rule ID MSTEST0009
Title TestCleanup method should have valid layout
Category Usage
Fix is breaking or non-breaking Non-breaking
Enabled by default Yes
Default severity Warning
Introduced in version 3.3.0
Is there a code fix Yes

Cause

A method marked with [TestCleanup] should have valid layout.

Rule description

Methods marked with [TestCleanup] should follow the following layout to be valid:

  • it should be public
  • it should not be abstract
  • it should not be async void
  • it should not be static
  • it should not be a special method (finalizer, operator...).
  • it should not be generic
  • it should not take any parameter
  • return type should be void, Task or ValueTask

The type declaring these methods should also respect the following rules:

  • The type should be a class.
  • The class should be public or internal (if the test project is using the [DiscoverInternals] attribute).
  • The class shouldn't be static.
  • If the class is sealed, it should be marked with [TestClass] (or a derived attribute).

How to fix violations

Ensure that the method matches the layout described above.

When to suppress warnings

Do not suppress a warning from this rule. If you ignore this rule, flagged instances will be either skipped or result in runtime error.