xenadmin/XenAdminTests/Controls/LongStringComboBoxTest.cs

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using System;
using System.Text;
using NUnit.Framework;
using XenAdmin.Controls;

namespace XenAdminTests.Controls
{
    [TestFixture, Category(TestCategories.Unit)]
    public class LongStringComboBoxTest
    {
        private class LongStringComboBoxWrapper : LongStringComboBox
        {
            public LongStringComboBoxWrapper()
            {
                Items.AddRange(new object[]{"This", "is", "some", "base", "data"});
                Width = 200;
            }
            public void TriggerDropDown()
            {
                OnDropDown(new EventArgs());
            }
        }
        
        [Test]
        public void CheckValidDropDownWidthSetUnderSize()
        {
            LongStringComboBoxWrapper cb = new LongStringComboBoxWrapper();
            cb.Items.Add("Word");
            cb.TriggerDropDown();
            Assert.That(cb.Items.Count, Is.EqualTo(6));
            Assert.That(cb.Width, Is.EqualTo(200));
            Assert.That(cb.DropDownWidth, Is.EqualTo(200));
        }

        [Test]
        public void CheckValidDropDownWidthSetOverSize()
        {
            LongStringComboBoxWrapper cb = new LongStringComboBoxWrapper();
            cb.Items.Add(ALongWord);
            cb.TriggerDropDown();
            Assert.That(cb.Items.Count, Is.EqualTo(6));
            Assert.That(cb.Width, Is.EqualTo(200));
            Assert.That(cb.DropDownWidth, Is.Not.EqualTo(200));
            Assert.That(cb.DropDownWidth, Is.GreaterThan(200));
        }

        private string ALongWord
        {
            get
            {
                StringBuilder sb = new StringBuilder();
                for (int i = 0; i < 2000; i++)
                {
                    sb.Append("Word");
                }
                return sb.ToString();
            }
        }
    }
}