NUnit1004

NUnit1004

Too many arguments provided by TestCaseAttribute.

Topic	Value
Id	NUnit1004
Severity	Error
Enabled	True
Category	Structure
Code	TestCaseUsageAnalyzer

Description

The number of arguments provided by a TestCaseAttribute must match the number of parameters of the method.

Motivation

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

How to fix violations

Example Violation

[TestCase("1", "2")]
public void NUnit1004SampleTest(string parameter1)
{
    Assert.That(parameter1, Is.EqualTo("1"));
}

Explanation

In the sample above, there are two arguments provided by test case (TestCase("1", "2")), but only one parameter is being expected by the test itself ((string parameter1)).

Fix

Either make use of the additional argument:

[TestCase("1", "2")]
public void NUnit1003SampleTest(string parameter1, string parameter2)
{
    Assert.That(parameter1, Is.EqualTo("1"));
    Assert.That(parameter2, Is.EqualTo("2"));
}

Or remove it:

[TestCase("1")]
public void NUnit1003SampleTest(string parameter1)
{
    Assert.That(parameter1, Is.EqualTo("1"));
}

Configure severity

Via ruleset file.

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

Via #pragma directive.

#pragma warning disable NUnit1004 // Too many arguments provided by TestCaseAttribute.
Code violating the rule here
#pragma warning restore NUnit1004 // Too many arguments provided by TestCaseAttribute.

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

#pragma warning disable NUnit1004 // Too many arguments provided by TestCaseAttribute.

Via attribute [SuppressMessage].

[System.Diagnostics.CodeAnalysis.SuppressMessage("Structure", 
    "NUnit1004:Too many arguments provided by TestCaseAttribute.",
    Justification = "Reason...")]