docs/articles/nunit-analyzers/NUnit2040.md
| Topic | Value |
|---|---|
| Id | NUnit2040 |
| Severity | Error |
| Enabled | True |
| Category | Assertion |
| Code | SameAsOnValueTypesAnalyzer |
The SameAs constraint always fails on value types as the actual and the expected value cannot be the same reference.
var expected = Guid.Empty;
var actual = expected;
Assert.That(actual, Is.SameAs(expected));
As Guid is a struct, actual will be a copy of expected but not have the same reference.
Replace Is.SameAs with Is.EqualTo.
var expected = Guid.Empty;
var actual = expected;
Assert.That(actual, Is.EqualTo(expected));
Configure the severity per project, for more info see MSDN.
# NUnit2040: Non-reference types for SameAs constraint
dotnet_diagnostic.NUnit2040.severity = chosenSeverity
where chosenSeverity can be one of none, silent, suggestion, warning, or error.
#pragma warning disable NUnit2040 // Non-reference types for SameAs constraint
Code violating the rule here
#pragma warning restore NUnit2040 // Non-reference types for SameAs constraint
Or put this at the top of the file to disable all instances.
#pragma warning disable NUnit2040 // Non-reference types for SameAs constraint
[SuppressMessage][System.Diagnostics.CodeAnalysis.SuppressMessage("Assertion",
"NUnit2040:Non-reference types for SameAs constraint",
Justification = "Reason...")]