Introduce templateutil.Template as interface to html/template.Template and text/template.Template

templateutil/file.go

@@ -12,7 +12,7 @@ import (
 )
 
 // WriteTemplateToFile executes a template with the given data and saves the result into a file.
-func WriteTemplateToFile(filePath string, tmpl *template.Template, data any) error {
+func WriteTemplateToFile(filePath string, tmpl Template, data any) error {
 	var driver bytes.Buffer
 
 	err := tmpl.Execute(&driver, data)

templateutil/interface.go

@@ -0,0 +1,8 @@
+package templateutil
+
+import "io"
+
+type Template interface {
+	// Execute applies the template to the specified data object and writes the output to the writer.
+	Execute(wr io.Writer, data any) (err error)
+}