tests/DotNetCommon.Test/ExpressionHelperTests/GetAccessNamesTest.cs

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using DotNetCommon.Extensions;
using DotNetCommon.Test.ExpressionHelperTests.Model;
using NUnit.Framework;
using Shouldly;
using System;
using System.Collections.Generic;
using System.Linq.Expressions;
using System.Text;
using System.Threading.Tasks;

namespace DotNetCommon.Test.ExpressionHelperTests
{
    namespace Model
    {
        public class Person
        {
            public int Id { get; set; }
            public string Name { get; set; }
            public object Obj { get; set; }
            public int Age { get; set; }
            public DateTime? Birth { get; set; }
            public TaskStatus Status { get; set; }
            public Person InnerPerson { get; set; }
        }
    }

    [TestFixture]
    internal class GetAccessNamesTest
    {
        [Test]
        public void OneParamenterTest()
        {
            Expression<Func<Person, Object>> expression = p => p.Id;
            var cols = ExpressionHelper.GetAccessNames(expression);
            cols.ShouldBe(new List<string>() { "Id" });

            expression = p => new { p.Id, p.Name };
            cols = ExpressionHelper.GetAccessNames(expression);
            cols.ShouldBe(new List<string>() { "Id", "Name" });

            expression = p => new { p.Id, p.Name, p.Obj };
            cols = ExpressionHelper.GetAccessNames(expression);
            cols.ShouldBe(new List<string>() { "Id", "Name", "Obj" });

            expression = p => p.Id + p.Name + p.Obj;
            cols = ExpressionHelper.GetAccessNames(expression);
            cols.ShouldBe(new List<string>() { "Id", "Name", "Obj" });

            expression = p => p.Age + p.InnerPerson.Id;
            cols = ExpressionHelper.GetAccessNames(expression);
            cols.ShouldBe(new List<string>() { "Age", "InnerPerson" });

            expression = p => p.Id > 0 ? p.Name : $"小明{p.Birth}";
            cols = ExpressionHelper.GetAccessNames(expression);
            cols.ShouldBe(new List<string>() { "Id", "Name", "Birth" });

            expression = p => p;
            cols = ExpressionHelper.GetAccessNames(expression);
            cols.ShouldBe(new List<string>());
        }