v2 v3   Error

xUnit9007

"Test classes may not be decorated with ICollectionFixture<>"

Cause

A violation of this rule occurs when a test class is decorated with IConnectionFixture<>.

Reason for rule

Collection fixtures may only be declared on collection definition classes.

The two most common scenarios for this to occur are:

• The developer mistakenly meant to use IClassFixture<>
• The developer is attempting to use the test class as its own collection definition

How to fix violations

To fix a violation of this rule, either replace ICollectionFixture<> with IClassFixture<>, or separate the collection definition into its own class.

Examples

Violates

using Xunit;

public class xUnit9007 : ICollectionFixture<object>
{
    [Fact]
    public void TestMethod()
    { }
}

using Xunit;

[CollectionDefinition]
[Collection(typeof(xUnit9007))]
public class xUnit9007 : ICollectionFixture<object>
{
    [Fact]
    public void TestMethod()
    { }
}

Does not violate

using Xunit;

public class xUnit9007 : IClassFixture<object>
{
    [Fact]
    public void TestMethod()
    { }
}

using Xunit;

[CollectionDefinition]
public class xUnit9007Collection : ICollectionFixture<object>
{ }

[Collection(typeof(xUnit9007Collection))]
public class xUnit9007
{
    [Fact]
    public void TestMethod()
    { }
}