Allow all markdown files to be processed

src/Pretzel.Logic/Templating/Context/PathExtensions.cs

@@ -5,7 +5,7 @@ namespace Pretzel.Logic.Templating.Context
 {
     public static class PathExtensions
     {
-        private static readonly string[] MarkdownFiles = new[] { ".md", ".mdown", ".markdown" };
+        private static readonly string[] MarkdownFiles = new[] { ".md", ".mkd", ".mkdn", ".mdown", ".markdown" };
         private static readonly string[] ImageFiles = new[] { ".png", ".gif", ".jpg" };
 
         public static bool IsMarkdownFile(this string extension)

src/Pretzel.Logic/Templating/Context/SiteContextGenerator.cs

@@ -278,7 +278,7 @@ private string RenderContent(string file, string contents, IDictionary<string, o
             try
             {
                 var contentsWithoutHeader = contents.ExcludeHeader();
-                html = string.Equals(Path.GetExtension(file), ".md", StringComparison.InvariantCultureIgnoreCase)
+                html = Path.GetExtension(file).IsMarkdownFile()
                        ? Markdown.Transform(contentsWithoutHeader)
                        : contentsWithoutHeader;
 

src/Pretzel.Tests/Templating/Context/SiteContextGeneratorTests.cs

@@ -334,5 +334,58 @@ public void site_context_pages_have_date_in_bag(string fileName, bool useDefault
 
             Assert.Equal(expectedDate, actualDate);
         }
+
+        [Fact]
+        public void site_context_generator_processes_page_markdown_mkd()
+        {
+            // arrange
+            fileSystem.AddFile(@"C:\TestSite\_posts\2012-01-01-SomeFile.mkd", new MockFileData(ToPageContent("# Title")));
+
+            // act
+            var siteContext = generator.BuildContext(@"C:\TestSite", false);
+
+            // assert
+            Assert.Equal("<h1>Title</h1>", siteContext.Posts[0].Content.Trim());
+        }
+
+        [Fact]
+        public void site_context_generator_processes_page_markdown_mkdn()
+        {
+            // arrange
+            fileSystem.AddFile(@"C:\TestSite\_posts\2012-01-01-SomeFile.mkdn", new MockFileData(ToPageContent("# Title")));
+
+            // act
+            var siteContext = generator.BuildContext(@"C:\TestSite", false);
+
+            // assert
+            Assert.Equal("<h1>Title</h1>", siteContext.Posts[0].Content.Trim());
+        }
+
+        [Fact]
+        public void site_context_generator_processes_page_markdown_mdown()
+        {
+            // arrange
+            fileSystem.AddFile(@"C:\TestSite\_posts\2012-01-01-SomeFile.mdown", new MockFileData(ToPageContent("# Title")));
+
+            // act
+            var siteContext = generator.BuildContext(@"C:\TestSite", false);
+
+            // assert
+            Assert.Equal("<h1>Title</h1>", siteContext.Posts[0].Content.Trim());
+        }
+
+        [Fact]
+        public void site_context_generator_processes_page_markdown_markdown()
+        {
+            // arrange
+            fileSystem.AddFile(@"C:\TestSite\_posts\2012-01-01-SomeFile.markdown", new MockFileData(ToPageContent("# Title")));
+
+            // act
+            var siteContext = generator.BuildContext(@"C:\TestSite", false);
+
+            // assert
+            Assert.Equal("<h1>Title</h1>", siteContext.Posts[0].Content.Trim());
+        }
+
     }
 }