using System;
using System.Collections.Generic;
using System.Text;
using NUnit.Framework;
using ImageSorter;
using System.IO;

namespace ImageSorterTests
{
    [TestFixture]
    public class TestSaveLoad
    {
        const string c_simpleImageList = @"
<images>
  <image file=""IMG_2097.JPG"">
    <bike />
  </image>
</images>
";

        [Test]
        public void TestSimpleLoad()
        {
            doSImpleLoadTest(c_simpleImageList);
        }

        private static void doSImpleLoadTest(string fileToLoad)
        {
            ImageCollection images;
            using (StringReader rdr = new StringReader(fileToLoad))
            {
                images = new ImageCollection(rdr);
            }

            Assert.AreEqual(1, images.Count);
            Assert.AreEqual("IMG_2097.JPG", images[0].Filename);
            Assert.IsTrue(images[0].HasTag("bike"));
            Assert.IsFalse(images[0].HasTag("sunshine"));

            Assert.AreEqual(1, images.Tags.Count);
            List<string> tags = new List<string>(images.Tags);
            Assert.AreEqual("bike", tags[0]);
        }
        [Test]
        public void TestSave()
        {
            // GIVEN an image collection loaded from the
            // simple file above
            ImageCollection images;
            using (StringReader rdr = new StringReader(c_simpleImageList))
            {
                images = new ImageCollection(rdr);
            }

            // WHEN we save it again
            string saveFile;
            using (StringWriter wrt = new StringWriter())
            {
                images.WriteTo(wrt);
                saveFile = wrt.ToString();
            }

            // THEN the save file should be reasonable
            StringAssert.Contains("IMG_2097.JPG", saveFile);
            StringAssert.Contains("bike", saveFile);

            // and it should be possible to re-read
            // it, with the same results as the original
            // save file.
            doSImpleLoadTest(saveFile);
        }
    }
}