NUnit1001

The individual arguments provided by a TestCaseAttribute must match the type of the corresponding parameter of the method

Topic	Value
Id	NUnit1001
Severity	Error
Enabled	True
Category	Structure
Code	TestCaseUsageAnalyzer

Description

The individual arguments provided by a TestCaseAttribute must match the type of the corresponding parameter of the method.

Motivation

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

How to fix violations

Example Violation

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

[TestCase<double>(42)]
public void SampleTest(int numberValue)
{
    Assert.That(numberValue, Is.EqualTo(1));
}

Problem

In the test case above, true in the test case indicates that numberValue should be a boolean. However, the test declares that numberValue is an integer. This will lead to a runtime failure.

Fix

Ensure that the type of the test case and the input matches.

So, this fix would be acceptable:

// TestCase input and parameter are both of type bool
[TestCase(true)]
public void SampleTest(bool booleanValue)
{
    Assert.That(booleanValue, Is.True);
}

And this would also work:

// TestCase input and parameter are both of type int
[TestCase(1)]
public void SampleTest(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

# NUnit1001: The individual arguments provided by a TestCaseAttribute must match the type of the corresponding parameter of the method
dotnet_diagnostic.NUnit1001.severity = chosenSeverity

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

Via #pragma directive

#pragma warning disable NUnit1001 // The individual arguments provided by a TestCaseAttribute must match the type of the corresponding parameter of the method
Code violating the rule here
#pragma warning restore NUnit1001 // The individual arguments provided by a TestCaseAttribute must match the type of the corresponding parameter of the method

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

#pragma warning disable NUnit1001 // The individual arguments provided by a TestCaseAttribute must match the type of the corresponding parameter of the method

Via attribute [SuppressMessage]

[System.Diagnostics.CodeAnalysis.SuppressMessage("Structure",
    "NUnit1001:The individual arguments provided by a TestCaseAttribute must match the type of the corresponding parameter of the method",
    Justification = "Reason...")]