Switch to handlebars

Author: ErikSchierboom

exercises/practice/acronym/.meta/Generator.tpl

@@ -1,12 +1,12 @@
 using Xunit;
 
-public class {{exercise.name}}Tests
+public class AcronymTests
 {
-    {{for test_case in test_cases}}
-    [Fact{{if !for.first}}(Skip = "Remove this Skip property to run this test"){{end}}]
-    public void {{test_case.path |  method_name}}()
+    {{#test_cases}}
+    [Fact{{#unless @first}}(Skip = "Remove this Skip property to run this test"){{/unless}}]
+    public void {{method_name path}}()
     {
-        Assert.Equal("{{test_case.expected}}", {{exercise.name}}.Abbreviate("{{test_case.input.phrase}}"));
+        Assert.Equal("{{expected}}", Acronym.Abbreviate("{{input.phrase}}"));
     }
-    {{end}}
+    {{/test_cases}}
 }

exercises/practice/difference-of-squares/.meta/Generator.tpl

@@ -1,28 +1,28 @@
 using Xunit;
 
-public class {{exercise.name}}Tests
+public class DifferenceOfSquaresTests
 {
-    {{for test_case in test_cases_by_property.squareOfSum}}
-    [Fact{{if !for.first}}(Skip = "Remove this Skip property to run this test"){{end}}]
-    public void {{test_case.description | method_name}}()
+    {{#test_cases_by_property.squareOfSum}}
+    [Fact{{#unless @first}}(Skip = "Remove this Skip property to run this test"){{/unless}}]
+    public void {{method_name description}}()
     {
-        Assert.Equal({{test_case.expected}}, {{exercise.name}}.CalculateSquareOfSum({{test_case.input.number}}));
+        Assert.Equal({{expected}}, DifferenceOfSquares.CalculateSquareOfSum({{input.number}}));
     }
-    {{end}}
+    {{/test_cases_by_property.squareOfSum}}
 
-    {{for test_case in test_cases_by_property.sumOfSquares}}
-    [Fact{{if !for.first}}(Skip = "Remove this Skip property to run this test"){{end}}]
-    public void {{test_case.description | method_name}}()
+    {{#test_cases_by_property.sumOfSquares}}
+    [Fact{{#unless @first}}(Skip = "Remove this Skip property to run this test"){{/unless}}]
+    public void {{method_name description}}()
     {
-        Assert.Equal({{test_case.expected}}, {{exercise.name}}.CalculateSumOfSquares({{test_case.input.number}}));
+        Assert.Equal({{expected}}, DifferenceOfSquares.CalculateSumOfSquares({{input.number}}));
     }
-    {{end}}
+    {{/test_cases_by_property.sumOfSquares}}
 
-    {{for test_case in test_cases_by_property.differenceOfSquares}}
-    [Fact{{if !for.first}}(Skip = "Remove this Skip property to run this test"){{end}}]
-    public void {{test_case.description | method_name}}()
+    {{#test_cases_by_property.differenceOfSquares}}
+    [Fact{{#unless @first}}(Skip = "Remove this Skip property to run this test"){{/unless}}]
+    public void {{method_name description}}()
     {
-        Assert.Equal({{test_case.expected}}, {{exercise.name}}.CalculateDifferenceOfSquares({{test_case.input.number}}));
+        Assert.Equal({{expected}}, DifferenceOfSquares.CalculateDifferenceOfSquares({{input.number}}));
     }
-    {{end}}  
+    {{/test_cases_by_property.differenceOfSquares}}
 }

exercises/practice/isogram/.meta/Generator.tpl

@@ -1,12 +1,12 @@
 using Xunit;
 
-public class {{exercise.name}}Tests
+public class IsogramTests
 {
-    {{for test_case in test_cases}}
-    [Fact{{if !for.first}}(Skip = "Remove this Skip property to run this test"){{end}}]
-    public void {{test_case.path | method_name}}()
+    {{#test_cases}}
+    [Fact{{#unless @first}}(Skip = "Remove this Skip property to run this test"){{/unless}}]
+    public void {{method_name path}}()
     {
-        Assert.{{test_case.expected}}({{exercise.name}}.IsIsogram("{{test_case.input.phrase}}"));
+        Assert.{{expected}}(Isogram.IsIsogram("{{input.phrase}}"));
     }
-    {{end}}
+    {{/test_cases}}
 }

exercises/practice/leap/.meta/Generator.tpl

@@ -1,12 +1,12 @@
 using Xunit;
 
-public class {{exercise.name}}Tests
+public class LeapTests
 {
-    {{for test_case in test_cases}}
-    [Fact{{if !for.first}}(Skip = "Remove this Skip property to run this test"){{end}}]
-    public void {{test_case.path | method_name}}()
+    {{#test_cases}}
+    [Fact{{#unless @first}}(Skip = "Remove this Skip property to run this test"){{/unless}}]
+    public void {{method_name path}}()
     {
-        Assert.{{test_case.expected}}({{exercise.name}}.IsLeapYear({{test_case.input.year}}));
+        Assert.{{expected}}(Leap.IsLeapYear({{input.year}}));
     }
-    {{end}}
+    {{/test_cases}}
 }

generators.new/Generators.csproj

@@ -9,9 +9,9 @@
 
   <ItemGroup>
     <PackageReference Include="CommandLineParser" Version="2.9.1" />
+    <PackageReference Include="Handlebars.Net" Version="2.1.6" />
     <PackageReference Include="Humanizer.Core" Version="2.14.1" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.12.0" />
-    <PackageReference Include="Scriban" Version="5.12.1" />
     <PackageReference Include="Tomlyn" Version="0.18.0" />
   </ItemGroup>
 

generators.new/TemplateRenderer.cs

@@ -1,42 +1,34 @@
-using Humanizer;
+using HandlebarsDotNet;
 
-using Scriban;
-using Scriban.Runtime;
+using Humanizer;
 
 namespace Generators;
 
 internal static class TemplateRenderer
 {
+    static TemplateRenderer() =>
+        Handlebars.RegisterHelper("method_name", (writer, context, parameters) =>
+        {
+            var path = parameters.SelectMany(parameter => parameter as IEnumerable<string> ?? [parameter.ToString()!]);
+            writer.WriteSafeString(string.Join(" ", path).Dehumanize());
+        });
+
     public static string RenderTests(Exercise exercise, TestCase[] testCases) =>
-        Template.Parse(File.ReadAllText(Paths.TemplateFile(exercise)))
-            .Render(CreateTemplateContext(exercise, testCases))!;
+        CompileTemplate(exercise)(ToTemplateData(exercise, testCases));
+
+    private static HandlebarsTemplate<object, object> CompileTemplate(Exercise exercise) =>
+        Handlebars.Compile(File.ReadAllText(Paths.TemplateFile(exercise)));
 
-    private static TemplateContext CreateTemplateContext(Exercise exercise, TestCase[] testCases)
-    {
-        var customFunctions = new CustomFunctions
+    private static Dictionary<string, object> ToTemplateData(Exercise exercise, TestCase[] testCases) =>
+        new()
         {
             { "exercise", exercise },
             { "test_cases", testCases },
             { "test_cases_by_property", GroupTestCasesByProperty(testCases)}
         };
 
-        var context = new TemplateContext();
-        context.PushGlobal(customFunctions);
-
-        return context;
-    }
-
     private static Dictionary<string, TestCase[]> GroupTestCasesByProperty(TestCase[] testCases) =>
         testCases
             .GroupBy(testCase => testCase.Property)
             .ToDictionary(kv => kv.Key, kv => kv.ToArray());
-
-    private class CustomFunctions : ScriptObject
-    {   
-        public static string MethodName(params object[] path)
-        {
-            var flattenedPath = path.SelectMany(x => x as IEnumerable<string> ?? [x.ToString()!]);
-            return string.Join(" ", flattenedPath).Dehumanize();
-        }
-    }
 }