xUnit Test output helper

Author : MD TAREQ HASSAN

Points to Note

Test constructor (setup) and dispose (teardown) will be called per test which is expensive if constructor contains heavy lifting thats why we need shared context ()
When using shared context, setup and teardown will be shared (all tests of a class or across many classes)
Use IClassFixure<T> for sharing context between tests (all test of a class will share same setup and teardown)
Use ICollectionFixture<T> for sharing context across multiple test classes
Shared Context between Tests

IClassFixture

FooFixture.cs

public class FooFixture : IDisposable
{
    public Foo State { get; private set; }

    public FooFixture()
    {
        State = new Foo();
    }

    public void Dispose()
    {
        // Cleanup
    }
}

FooTest.cs

public class FooTest : IClassFixture<FooFixture>
{
    private readonly FooFixture _fooFixture;

    public FooTest(FooFixture fooFixture)
    {
        _fooFixture = fooFixture;
    }

    [Fact]
    public void ATest()
    {
        // Assert here
        // use _fooFixture.State to test Foo class
    }
}

ICollectionFixture

FooCollectionFixture.cs (using FooFixture.cs)

[CollectionDefinition("FooFixtureCollection")]
public class GameStateCollection : ICollectionFixture<FooFixture> {}

Using in TestClassOne.cs

[Collection("FooFixtureCollection")]
public class TestClassOne
{
    private readonly GameStateFixture _gameStateFixture;

    public TestClassOne(GameStateFixture gameStateFixture)
    {
        _gameStateFixture = gameStateFixture;
    }

    [Fact]
    public void ATest()
    {
        // Assert here
        // use _fooFixture.State to test Foo class
    }
}

Using in TestClassTwo.cs

[Collection("FooFixtureCollection")]
public class TestClassTwo
{
    private readonly GameStateFixture _gameStateFixture;

    public TestClassTwo(GameStateFixture gameStateFixture)
    {
        _gameStateFixture = gameStateFixture;
    }

    [Fact]
    public void ATest()
    {
        // Assert here
        // use _fooFixture.State to test Foo class
    }
}