using System;
using Luticate2.Utils.Utils;
using Xunit;

namespace TestUtils.Utils
{
    public class LuCoreUtilsExtensionsTest
    {
        [Fact]
        public void TestStringToOptGuidNull()
        {
            string str = null;
            Assert.Null(str.ToOptGuid());
        }

        [Fact]
        public void TestStringToGuidValid()
        {
            var str = "365989fc-cbd6-11e6-99ca-3085a902d67c";
            Assert.Equal(str, str.ToGuid().ToString());
        }

        [Fact]
        public void TestStringToGuidInvalid()
        {
            var str = "42";
            Assert.Throws<FormatException>(() => str.ToGuid());
        }

        [Fact]
        public void TestStringToSnakeCaseNull()
        {
            string str = null;
            Assert.Throws<ArgumentNullException>(() => str.ToSnakeCase());
        }

        [Fact]
        public void TestStringToSnakeCaseEmpty()
        {
            var str = "";
            Assert.Equal("", str.ToSnakeCase());
        }

        [Fact]
        public void TestStringToSnakeCase1()
        {
            var str = "TestNotEmpty";
            Assert.Equal("test_not_empty", str.ToSnakeCase());
        }

        [Fact]
        public void TestStringToSnakeCase2()
        {
            var str = "testNotEmpty";
            Assert.Equal("test_not_empty", str.ToSnakeCase());
        }

        [Fact]
        public void TestStringToSnakeCase3()
        {
            var str = "DBContext";
            Assert.Equal("d_b_context", str.ToSnakeCase());
        }
    }
}