xUnit1005 Warning

Fact methods should not have test data

Cause

A fact method has one or more attributes that provide test data.

Reason for rule

Unlike theory methods, fact methods do not have any parameters. Providing a fact method with test data is therefore pointless, as there is no way to actually pass that data to the test method.

How to fix violations

To fix a violation of this rule, either:

Turn the fact method into a theory method by replacing [Fact] with [Theory], if your test method is parameterized.
Remove any attributes that provide test data, if your test method is not parameterized. (That is, remove all attributes of a type deriving from DataAttribute, such as [ClassData], [InlineData], or [MemberData].)

Examples

Violates

using Xunit;

public class xUnit1005
{
    [Fact, InlineData(1)]
    public void TestMethod()
    { }
}

Does not violate

using Xunit;

public class xUnit1005
{
    [Fact]
    public void TestMethod()
    { }
}

using Xunit;

public class xUnit1005
{
    [Theory, InlineData(1)]
    public void TestMethod(int _)
    { }
}