wrote rubric parsing tests

Management.Web/Shared/Components/AssignmentForm/RubricMarkdownEditor.razor

@@ -9,6 +9,7 @@
   private string rubricText = "";
   private int rubricReloadKey = 0;
 
+
   protected override void OnInitialized()
   {
     assignmentContext.StateHasChanged += reload;

Management/Models/Local/LocalAssignment.cs

@@ -1,4 +1,5 @@
 using System.Collections;
+using System.Text;
 using System.Text.RegularExpressions;
 using YamlDotNet.Serialization;
 
@@ -97,27 +98,40 @@ public record LocalAssignment
     return assignmentMarkdown;
   }
 
+  public string RubricToMarkdown()
+  {
+    var builder = new StringBuilder();
+    foreach (var item in Rubric)
+    {
+      var pointLabel = item.Points > 1 ? "pts" : "pt";
+      builder.Append($"- {item.Points}{pointLabel}: {item.Label}" + Environment.NewLine);
+    }
+    return builder.ToString();
+  }
+
   public static IEnumerable<RubricItem> ParseRubricMarkdown(string rawMarkdown)
   {
     var lines = rawMarkdown.Trim().Split(Environment.NewLine);
-    var items = lines.Select(l =>
+    var items = lines.Select(parseIndividualRubricItemMarkdown).ToArray();
+    return items;
+  }
+
+  private static RubricItem parseIndividualRubricItemMarkdown(string rawMarkdown)
   {
     var pointsPattern = @"\s*-\s*(\d+)\s*pt(s)?:";
-      var match = Regex.Match(l, pointsPattern);
+    var match = Regex.Match(rawMarkdown, pointsPattern);
     if (!match.Success)
-        throw new RubricMarkdownParseException($"points not found: {l}");
+      throw new RubricMarkdownParseException($"points not found: {rawMarkdown}");
 
     var points = int.Parse(match.Groups[1].Value);
 
-      var label = string.Join(": ", l.Split(": ").Skip(1));
+    var label = string.Join(": ", rawMarkdown.Split(": ").Skip(1));
 
     return new RubricItem()
     {
       Points = points,
       Label = label
     };
-    }).ToArray();
-    return items;
   }
 }