Init Db with Xunit

InitDbXunit.cs

    public class InMemoryDbInstance 
    {
        public InMemoryDbInstance()
        {
            Data = "";
        }

        public string Data { get; set; }
    }

    public class InitializedDb
    {
        private readonly InMemoryDbInstance _db;

        public string Data => _db.Data;

        public InitializedDb()
        {
            _db = new InMemoryDbInstance
            {
                Data = "Claudio"
            };
        }
    }

    [CollectionDefinition("InitializedDb")]
    public class DatabaseCollection : ICollectionFixture<InitializedDb>
    {
    }

    [Collection("InitializedDb")]
    public class TestClass1
    {
        private readonly InitializedDb _db;

        public TestClass1(InitializedDb db)
        {
            _db = db;
        }

        [Fact]
        public void Test()
        {
            Assert.Equal("Claudio", _db.Data);
        }
    }