NUnit2022

Missing property required for constraint

Topic	Value
Id	NUnit2022
Severity	Error
Enabled	True
Category	Assertion
Code	MissingPropertyAnalyzer

Description

The actual argument should have the required property for the constraint.

Motivation

Using property constraints (e.g. Has.Count.EqualTo(1), Has.Property("Prop").EqualTo(expected), etc) makes sense only when provided actual argument has those properties defined.

[Test]
public void Test()
{
    var enumerable = new [] {1,2,3}.Where(i => i > 1);

    // Actual argument type 'IEnumerable<int>' has no property 'Count'.
    Assert.That(enumerable, Has.Count.EqualTo(2));
}

How to fix violations

Fix your property name, or use another constraint.

Configure severity

Via ruleset file

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

Via .editorconfig file

# NUnit2022: Missing property required for constraint
dotnet_diagnostic.NUnit2022.severity = chosenSeverity

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

Via #pragma directive

#pragma warning disable NUnit2022 // Missing property required for constraint
Code violating the rule here
#pragma warning restore NUnit2022 // Missing property required for constraint

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

#pragma warning disable NUnit2022 // Missing property required for constraint

Via attribute [SuppressMessage]

[System.Diagnostics.CodeAnalysis.SuppressMessage("Assertion",
    "NUnit2022:Missing property required for constraint",
    Justification = "Reason...")]