how to use displayname in xml file

Question

i am a student, i cant find how i giva a name for each of my tests when i am using xml file. when we use datarow we can use displayname="". and then when i will run the tests evry test will have its own name. how can i do it when i use xml file in my test? im usung vs c# my xml file:

<?xml version="1.0" encoding="utf-8" ?>
<tar>
    <IsEarlier  Name="General" DisplayName="General">
        <hour1>13</hour1>
        <min1>15</min1>
        <hour2>13</hour2>
        <min2>17</min2>
        <res>true</res>
    </IsEarlier>

    <IsEarlier>
        <hour1>13</hour1>
        <min1>15</min1>
        <hour2>13</hour2>
        <min2>15</min2>
        <res>false</res>
    </IsEarlier>
    
    <IsEarlier DisplayName="check_clock">
        <hour1>13</hour1>
        <min1>15</min1>
        <hour2>13</hour2>
        <min2>15</min2>
        <res>false</res>
    </IsEarlier>

</tar>

my test:

[TestClass]
    public class UnitTest1
    {

        private TestContext context;
        public TestContext TestContext
        {
            get { return context; }
            set { context = value; }
        }


        [TestMethod]
        [DataSource("Microsoft.VisualStudio.TestTools.DataSource.XML",
            @"|DataDirectory|\TestDate\Clock.xml",
            "IsEarlier",
            DataAccessMethod.Sequential)]
        public void IsEarlierByXML()
        {
            int h1  = Convert.ToInt32(TestContext.DataRow["hour1"].ToString());
            int m1  = Convert.ToInt32(TestContext.DataRow["min1"].ToString());
            Clock.Clock c1 = new Clock.Clock(h1, m1);

            int h2 = Convert.ToInt32(TestContext.DataRow["hour2"].ToString());
            int m2 = Convert.ToInt32(TestContext.DataRow["min2"].ToString());
            Clock.Clock c2 = new Clock.Clock(h2, m2);


            bool expected = Convert.ToBoolean(TestContext.DataRow["res"].ToString());
            bool actual;

            actual = c1.IsEarlier(c2);

            Assert.IsTrue(expected == actual);
        }

Answer 1

The class file(s) would be .cs and best practice is usually one file per class with the class name and the filename matching, like IsEarlier.cs and Tar.cs. If you wanted them in the same file, something like ClockTestData.cs would make sense and maybe the same name instead of "Tar" for the list class.

Once you have the IsEarlier and Tar classes defined (as Luuk helped with), use the XmlSerializer to populate the class with your XML content. https://learn.microsoft.com/en-us/dotnet/standard/serialization/how-to-deserialize-an-object (so, something like this)

var xmlSerializer = new XmlSerializer(typeof(Tar));
using var fileStream = new FileStream("clock.xml", FileMode.Open);
var tar = (Tar)xmlSerializer.Deserialize(fileStream);

(Note in my example, the objects have the same names as the classes except camelCase vs PascalCase).

Then you'd be able to loop through the IsEarlier items in your tar.IsEarlier list and perform each test. E.g., if isEarlier is your object assigned in a foreach or for loop,

Clock.Clock c1 = new Clock.Clock(isEarlier.Hour1, isEarlier.Min1);