support edited_at metadata (#539)

* support edited_at metadata
* Adding unit test for dates
* Test for the Result object

Author: vgregoirecoveo

src/ZendeskApi_v2/Models/Articles/Article.cs

@@ -64,6 +64,10 @@ public class Article
         [JsonConverter(typeof(IsoDateTimeConverter))]
         public DateTimeOffset CreatedAt { get; set; }
 
+        [JsonProperty("edited_at")]
+        [JsonConverter(typeof(IsoDateTimeConverter))]
+        public DateTimeOffset EditedAt { get; set; }
+
         [JsonProperty("updated_at")]
         [JsonConverter(typeof(IsoDateTimeConverter))]
         public DateTimeOffset UpdatedAt { get; set; }

src/ZendeskApi_v2/Models/Articles/Result.cs

@@ -43,6 +43,9 @@ public class Result
         [JsonProperty("created_at")]
         public string CreatedAt { get; set; }
 
+        [JsonProperty("edited_at")]
+        public string EditedAt { get; set; }
+
         [JsonProperty("updated_at")]
         public string UpdatedAt { get; set; }
 

tests/ZendeskApi_v2.Tests/HelpCenter/ArticleTests.cs

@@ -1,5 +1,6 @@
 using NUnit.Framework;
 using System;
+using System.Linq;
 using System.Threading.Tasks;
 using ZendeskApi_v2.Models.Articles;
 using ZendeskApi_v2.Requests.HelpCenter;
@@ -220,5 +221,29 @@ public void CanSearchForArticles()
 
             Assert.That(resp.Count, Is.GreaterThan(0));
         }
+
+        [Test]
+        public void CanGetDateStringWhenSearchingArticle()
+        {
+            var response = Api.HelpCenter.Articles.GetArticle(_articleIdWithComments);
+            var expectedArticle = response.Article;
+            var searchRes = Api.HelpCenter.Articles.SearchArticlesFor("Test", createdBefore: DateTime.Now);
+            var resultArticle = searchRes.Results.First(res => res.Id == _articleIdWithComments);
+            
+            Assert.That(expectedArticle.CreatedAt.ToString("yyyy-MM-ddTHH:mm:ssZ"), Is.EqualTo(resultArticle.CreatedAt));
+            Assert.That(expectedArticle.EditedAt.ToString("yyyy-MM-ddTHH:mm:ssZ"), Is.EqualTo(resultArticle.EditedAt));
+            Assert.That(expectedArticle.UpdatedAt.ToString("yyyy-MM-ddTHH:mm:ssZ"), Is.EqualTo(resultArticle.UpdatedAt));
+        }
+
+        [Test]
+        public void CanDeserializeDatesCorrectly()
+        {
+            var defaultDate = new DateTimeOffset();
+            
+            var res = Api.HelpCenter.Articles.GetArticle(_articleIdWithComments);
+            Assert.That(res.Article.CreatedAt, Is.Not.EqualTo(defaultDate));
+            Assert.That(res.Article.EditedAt, Is.Not.EqualTo(defaultDate));
+            Assert.That(res.Article.UpdatedAt, Is.Not.EqualTo(defaultDate));
+        }
     }
 }