.NET单元测试使用AutoFixture按需填充的几种方式和最佳实践记录

public class User
{
	public int Id { get; set; }
	public string Name { get; set; } = null!;
	[EmailAddress]
	public string? Email { get; set; }
	[StringLength(512)]
	public string? Address { get; set; }
	public DateTime CreatedAt { get; set; } = DateTime.Now;
}

var fixture = new Fixture();
fixture.Customize<User>(c => c
    .With(x => x.Email, "特定值")
    .Without(x => x.Id));

var fixture = new Fixture();
fixture.Customize<User>(c => c.FromFactory(() => new User
{
    Email = "通过工厂方法生成",
}));

public class MyCustomClassCustomization : ICustomization
{
    public void Customize(IFixture fixture)
    {
        fixture.Customize<User>(c => c
            .With(x => x.Email, "自定义值")
            .Without(x => x.Id));
    }
}
// 使用定制化
var fixture = new Fixture();
fixture.Customize(new MyCustomClassCustomization());

var myCustomObject = fixture.Build<User>()
                            .With(x => x.Email, $"{Guid.NewId()}@example.com")
                            .Without(x => x.Id)
                            .Create();

public  class UserAutoDataAttribute : InlineAutoDataAttribute
    {
        public UserAutoDataAttribute(params object[] values) : base(values)
        {
            ArgumentNullException.ThrowIfNull(values[0]);
        }
        public override IEnumerable<object[]> GetData(MethodInfo testMethod)
        {
            var fixture = new Fixture();
            //这里使用上面的4种方式的一种,亦或者根据自身情况定制!
            var user = fixture.Build<User>()
                 //.With(x => x.Id, 0)
                 .Without(x => x.Id) //ID需要排除因为EFCore需要插入时自动生成
                 .With(x => x.Email, $"{Uuid7.NewUuid7()}@example.com") //邮箱地址,需要照规则生成
                 .Create();
            yield return new object[] { Values[0], user };
        }
    }

public class UnitOfWorkTests(ITestOutputHelper output)
{
	[Theory]
	[UserAutoData(1)]
	[UserAutoData(2)]
	public async Task MyUnitOfWorkTest(int db, User user)
	{
		var services = new ServiceCollection();
		services.AddLogging();
		services.AddDbContext<TestDbContext>(options =>
		 {
                    options.UseInMemoryDatabase($"test-{db}");
		});
		services.AddUnitOfWork<TestDbContext>();
		var provider = services.BuildServiceProvider();
		var uow = provider.GetRequiredService<IUnitOfWork<TestDbContext>>();
		//add user
		await uow.GetRepository<User>().InsertAsync(user);
		await uow.SaveChangesAsync();
		// select user
		var user2 = await uow.GetRepository<User>().FindAsync(1);
		Assert.NotNull(user2);
		// delete user
		uow.GetRepository<User>().Delete(1);
		var row = await uow.SaveChangesAsync();
		Assert.Equal(1, row);
		// select user
		user2 = await uow.GetRepository<User>().GetFirstOrDefaultAsync(x => x.Id == 1);
		Assert.Null(user2);
	}
}