WOrk on transformer

Author: ErikSchierboom

exercises/practice/perfect-numbers/.meta/Generator.tpl

@@ -0,0 +1,16 @@
+using Xunit;
+
+public class PerfectNumbersTests
+{
+    {{#test_cases}}
+    [Fact{{#unless @first}}(Skip = "Remove this Skip property to run this test"){{/unless}}]
+    public void {{method_name path}}()
+    {
+        {{#if error}}
+        Assert.Throws<ArgumentOutOfRangeException>(() => PerfectNumbers.Classify({{input.number}}));
+        {{else}}
+        Assert.Equal({{expected}}, PerfectNumbers.Classify({{input.number}}));
+        {{/if}}
+    }
+    {{/test_cases}}
+}

generators.new/CanonicalData.cs

@@ -4,6 +4,8 @@
 
 using LibGit2Sharp;
 
+using Microsoft.CodeAnalysis.CSharp.Syntax;
+
 namespace Generators;
 
 internal record TestCase(
@@ -12,6 +14,7 @@ internal record TestCase(
     string Property,
     Dictionary<string, dynamic> Input,
     dynamic Expected,
+    dynamic Error,
     string[] Path);
 
 internal static class CanonicalData
@@ -51,9 +54,19 @@ private static IEnumerable<TestCase> Parse(JsonObject jsonObject, ImmutableQueue
             : [ToTestCase(jsonObject, updatedPath)];
     }
 
-    private static TestCase ToTestCase(JsonObject jsonObject, IEnumerable<string> path)
+    private static TestCase ToTestCase(JsonObject testCaseJson, IEnumerable<string> path)
     {
-        jsonObject["path"] = JsonValue.Create(path);
-        return jsonObject.Deserialize<TestCase>(SerializerOptions)!;
+        testCaseJson["path"] = JsonValue.Create(path);
+        testCaseJson["error"] = ToError(testCaseJson);
+        return testCaseJson.Deserialize<TestCase>(SerializerOptions)!;
+    }
+
+    private static JsonNode? ToError(JsonObject testCaseJson)
+    {
+        if (testCaseJson["expected"] is JsonObject expectedJson &&
+            expectedJson.TryGetPropertyValue("error", out var error))
+            return error!.DeepClone();
+
+        return null;
     }
 }

generators.new/TestGenerator.cs

@@ -11,7 +11,9 @@ internal static void GenerateTestsFromTemplate(Exercise exercise)
             .Where(testCase => !excludedTestCaseIds.Contains(testCase.Uuid))
             .ToArray();
 
-        var renderedTests = TemplateRenderer.RenderTests(exercise, testCases);
+        var transformedTestCases = TestCaseTransformer.Transform(exercise, testCases);
+
+        var renderedTests = TemplateRenderer.RenderTests(exercise, transformedTestCases);
         File.WriteAllText(Paths.TestsFile(exercise), CodeFormatter.FormatCode(renderedTests));
     }
 }