Fix CCS category order search

api/QuestionsApi.Tests/CcsCaseTests.cs

@@ -143,6 +143,25 @@ public sealed class CcsCaseTests
         Assert.True(CcsRatingStore.ExpectedScore(800, 1000) < 0.25);
     }
 
+    [Theory]
+    [InlineData("medication", "medication")]
+    [InlineData("medication", "medications")]
+    [InlineData("medication", "treatment")]
+    [InlineData("procedure", "procedures")]
+    [InlineData("laboratory", "tests")]
+    [InlineData("diagnostic", "study")]
+    public void CcsOrderSearchMatchesClinicalCategories(string category, string query)
+    {
+        var order = new CcsOrderDefinition
+        {
+            Code = "order",
+            CanonicalName = "Unrelated canonical name",
+            Category = category
+        };
+
+        Assert.True(CcsStore.Rank(order, query) < 1000);
+    }
+
     [Fact]
     public void ScoringReviewIncludesExpectedAndObservedEvidence()
     {

api/QuestionsApi/Services/CcsStore.cs

@@ -695,12 +695,25 @@ public sealed class CcsStore
         PresentingLocation = value.PresentingLocation, RealTimeMinutes = value.RealTimeMinutes,
         Difficulty = value.Difficulty, Tags = value.Tags
     };
-    private static int Rank(CcsOrderDefinition order, string query)
+    internal static int Rank(CcsOrderDefinition order, string query)
     {
         var values = new[] { order.CanonicalName }.Concat(order.Aliases).Select(value => value.ToLowerInvariant());
         if (values.Any(value => value == query)) return 0;
         if (values.Any(value => value.StartsWith(query))) return 1;
         if (values.Any(value => value.Contains(query))) return 2;
+        if (CategorySearchTerms(order.Category).Contains(query, StringComparer.OrdinalIgnoreCase)) return 3;
         return 1000;
     }
+
+    private static IReadOnlyList<string> CategorySearchTerms(string category) =>
+        category.Trim().ToLowerInvariant() switch
+        {
+            "laboratory" => ["laboratory", "laboratories", "lab", "labs", "test", "tests", "diagnostic", "diagnostics", "study", "studies"],
+            "diagnostic" => ["diagnostic", "diagnostics", "test", "tests", "study", "studies"],
+            "medication" => ["medication", "medications", "medicine", "medicines", "drug", "drugs", "treatment", "treatments", "therapy", "therapies"],
+            "procedure" => ["procedure", "procedures", "intervention", "interventions", "treatment", "treatments"],
+            "monitoring" => ["monitor", "monitoring", "treatment", "treatments"],
+            "disposition" => ["disposition", "admission", "admit", "transfer", "discharge"],
+            _ => [category.Trim().ToLowerInvariant()]
+        };
 }