NUnit1027

The test method has parameters, but no arguments are supplied by attributes

Topic	Value
Id	NUnit1027
Severity	Error
Enabled	True
Category	Structure
Code	TestMethodUsageAnalyzer

Description

The test method has parameters, but no arguments are supplied by attributes.

Motivation

To prevent tests that will fail at runtime due to improper construction.

How to fix violations

Example Violation

[Test]
public void SampleTest(int numberValue)
{
    Assert.That(numberValue, Is.EqualTo(1));
}

Problem

In the test case above, the declares that it expects one integer parameter, but no argument is supplied by the attributes. This will lead to a runtime failure.

Fix

Ensure that the correct number of arguments - and of the correct type - is supplied to test methods that expect parameters.

One possible fix to this problem would be to supply the argument using a TestCase:

[TestCase(1)]
public void SampleTest(int numberValue)
{
    Assert.That(numberValue, Is.EqualTo(1));
}

Another approach could be to supply the argument using an attribute on the argument - like Range

[Test]
public void SampleTest([Range(1, 10)] int numberValue)
{
    Assert.That(numberValue, Is.EqualTo(1));
}

Configure severity

Via ruleset file

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

Via .editorconfig file

# NUnit1027: The test method has parameters, but no arguments are supplied by attributes
dotnet_diagnostic.NUnit1027.severity = chosenSeverity

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

Via #pragma directive

#pragma warning disable NUnit1027 // The test method has parameters, but no arguments are supplied by attributes
Code violating the rule here
#pragma warning restore NUnit1027 // The test method has parameters, but no arguments are supplied by attributes

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

#pragma warning disable NUnit1027 // The test method has parameters, but no arguments are supplied by attributes

Via attribute [SuppressMessage]

[System.Diagnostics.CodeAnalysis.SuppressMessage("Structure",
    "NUnit1027:The test method has parameters, but no arguments are supplied by attributes",
    Justification = "Reason...")]