refactor: improve DefaultTemplateRenderer

Author: WeihanLi

src/WeihanLi.Common/Template/DefaultTemplateRenderer.cs

@@ -16,7 +16,7 @@ public async Task<string> RenderAsync(TemplateRenderContext context, object? glo
         var parameters = globals.ParseParamDictionary();
         if (parameters is { Count: > 0 })
         {
-            foreach (var input in context.Inputs.Keys)
+            foreach (var input in context.Inputs.Keys.Where(x => x.Prefix is null))
             {
                 if (parameters.TryGetValue(input.VariableName, out var value))
                 {

test/WeihanLi.Common.Test/TemplateTest/TemplateRendererTest.cs

@@ -1,18 +1,50 @@
 // Copyright (c) Weihan Li. All rights reserved.
 // Licensed under the Apache license.
 
+using Microsoft.Extensions.Configuration;
 using WeihanLi.Common.Template;
+using WeihanLi.Extensions;
 using Xunit;
 
 namespace WeihanLi.Common.Test.TemplateTest;
 
 public class TemplateRendererTest
 {
+    private readonly TemplateEngine _templateEngine = TemplateEngine.CreateDefault(builder =>
+    {
+        builder.ConfigureOptions(options =>
+        {
+            options.Configuration = new ConfigurationBuilder()
+                .AddInMemoryCollection(
+                [
+                    new KeyValuePair<string, string?>("Name", "test")
+                ])
+                .Build();
+        });
+    });
+    
+    [Fact]
+    public async Task VariableRenderTest()
+    {
+        var name = "mike";
+        var text = "Hello {{ Name | toTitle }}";
+        var renderedText = await _templateEngine.RenderAsync(text, new { Name = name });
+        Assert.Equal($"Hello {name.ToTitleCase()}", renderedText);
+    }
+    
+    [Fact]
+    public async Task ConfigRenderTest()
+    {
+        var text = "Hello {{ $config Name | toTitle }}";
+        var renderedText = await _templateEngine.RenderAsync(text, new { Name = "mike" });
+        Assert.Equal($"Hello {"test".ToTitleCase()}", renderedText);
+    }
+    
     [Fact]
     public async Task EnvRenderTest()
     {
         var text = "Hello {{$env hostname}}";
-        var renderedText = await TemplateEngine.CreateDefault().RenderAsync(text);
+        var renderedText = await _templateEngine.RenderAsync(text);
         Assert.Equal($"Hello {Environment.GetEnvironmentVariable("hostname")}", renderedText);
     }
 }