NUnit2044

Non-delegate actual parameter

Description

The actual argument needs to be evaluated by the Assert to catch any exceptions.

Motivation

In order for the Assert.That to catch an exception or a timeout, the code must be a delegate so it can be evaluated by the method. If the parameter is not a delegate, it will be evaluated before the call to Assert.That and stop further execution.

How to fix violations

Convert the call into a delegate using a lambda expression or method group.

Configure severity

Via ruleset file

Configure the severity per project, for more info see MSDN.

Via .editorconfig file

# NUnit2044: Non-delegate actual parameter
dotnet_diagnostic.NUnit2044.severity = chosenSeverity

where chosenSeverity can be one of none, silent, suggestion, warning, or error.

Via #pragma directive

#pragma warning disable NUnit2044 // Non-delegate actual parameter
Code violating the rule here
#pragma warning restore NUnit2044 // Non-delegate actual parameter

Or put this at the top of the file to disable all instances.

#pragma warning disable NUnit2044 // Non-delegate actual parameter

Via attribute [SuppressMessage]

[System.Diagnostics.CodeAnalysis.SuppressMessage("Assertion",
    "NUnit2044:Non-delegate actual parameter",
    Justification = "Reason...")]