add modification tests

PocketSharp.Tests/ModifyTests.cs

@@ -6,8 +6,89 @@ using PocketSharp.Models;
 
 namespace PocketSharp.Tests
 {
-  class ModifyTests : TestsBase
+  public class ModifyTests : TestsBase
   {
     public ModifyTests() : base() { }
+
+
+    [Fact]
+    public async Task IsAnItemArchivedAndUnarchived()
+    {
+      PocketItem item = await Setup();
+
+      Assert.True(await client.Archive(item));
+
+      item = await GetItemById(item.ID, true);
+
+      Assert.True(item.IsArchive);
+
+      Assert.True(await client.Unarchive(item));
+
+      item = await GetItemById(item.ID);
+
+      Assert.False(item.IsArchive);
+    }
+
+
+    [Fact]
+    public async Task IsAnItemFavoritedAndUnfavorited()
+    {
+      PocketItem item = await Setup();
+
+      Assert.True(await client.Favorite(item));
+
+      item = await GetItemById(item.ID);
+
+      Assert.True(item.IsFavorite);
+
+      Assert.True(await client.Unfavorite(item));
+
+      item = await GetItemById(item.ID);
+
+      Assert.False(item.IsFavorite);
+    }
+
+
+    [Fact]
+    public async Task IsAnItemDeleted()
+    {
+      PocketItem item = await Setup();
+
+      Assert.True(await client.Delete(item));
+
+      item = await GetItemById(item.ID);
+
+      Assert.Null(item);
+    }
+
+
+    private async Task<PocketItem> Setup()
+    {
+      PocketItem item = await client.Add(
+        uri: new Uri("https://github.com"),
+        tags: new string[] { "github", "code", "social" }
+      );
+
+      itemsToDelete.Add(item.ID);
+
+      return await GetItemById(item.ID);
+    }
+
+
+    private async Task<PocketItem> GetItemById(int id, bool archive = false)
+    {
+      List<PocketItem> items = await client.Retrieve(state: archive ? State.archive : State.unread);
+      PocketItem itemDesired = null;
+
+      items.ForEach(itm =>
+      {
+        if (itm.ID == id)
+        {
+          itemDesired = itm;
+        }
+      });
+
+      return itemDesired;
+    }
   }
 }