using System;
using System.Collections.Generic;
using System.Text;
using System.Xml;
using NUnit.Framework;

namespace ChadSoft.Utils.Configy.Tests
{
    [TestFixture]
    public class ConfigMergerTests
    {
        [Test]
        public void MergeAppSettings()
        {
            XmlDocument expected = new XmlDocument();
            expected.LoadXml("<?xml version=\"1.0\" encoding=\"UTF-8\"?><appSettings><add key=\"Key1\" value=\"UPDATED\" /></appSettings>");

            XmlDocument first = new XmlDocument();
            XmlDocument second = new XmlDocument();

            first.LoadXml("<appSettings><add key=\"Key1\" value=\"Value1\" /></appSettings>");
            second.LoadXml("<appSettings><add key=\"Key1\" value=\"UPDATED\" /></appSettings>");
            
            XmlDocument actual = ConfigurationMerger.Merge(first, second);

            Assert.AreEqual(expected.OuterXml, actual.OuterXml);
        }


        [Test]
        public void MergeConnectionStrings()
        {
            XmlDocument expected = new XmlDocument();
            expected.LoadXml("<?xml version=\"1.0\" encoding=\"UTF-8\"?><connectionStrings><add name=\"conn1\" connectionString=\"UPDATED\" provider=\"System.Data.SqlClient\" /></connectionStrings>");

            XmlDocument first = new XmlDocument();
            XmlDocument second = new XmlDocument();

            first.LoadXml("<connectionStrings><add name=\"conn1\" connectionString=\"Value1\" /></connectionStrings>");
            second.LoadXml("<connectionStrings><add name=\"conn1\" connectionString=\"UPDATED\" provider=\"System.Data.SqlClient\" /></connectionStrings>");

            XmlDocument actual = ConfigurationMerger.Merge(first, second);

            Assert.AreEqual(expected.OuterXml, actual.OuterXml);
        }

        [Test]
        [ExpectedException(typeof(NotSupportedException))]
        public void MergeUnsupportedConfiguration()
        {
            XmlDocument first = new XmlDocument();
            XmlDocument second = new XmlDocument();

            first.LoadXml("<unsupportedConfig><add name=\"key1\" connectionString=\"Value1\" /></unsupportedConfig>");
            second.LoadXml("<unsupportedConfig><add name=\"key1\" connectionString=\"UPDATED\" /></unsupportedConfig>");

            // Throws exception
            ConfigurationMerger.Merge(first, second);
        }
    }
}