test: add cases for options passing, memory management, and type safety (#44)

* test: add tests for parameter passing, memory management, and type safety

* test: add tests for parameter passing, memory management, and type safety

* test: add tests for parameter passing, memory management, and type safety

* test: add tests for parameter passing, memory management, and type safety

* build: update generated vips package

Author: cshum

internal/generator/templatefunc.go

@@ -1206,6 +1206,16 @@ func generateCreatorMethodBody(op introspection.Operation) string {
 	// Add startup line
 	body = "Startup(nil)\n\t"
 
+	// Add buffer validation for operations with buffer input
+	if op.HasBufferInput {
+		if bufParam := getBufferParameter(op.RequiredInputs); bufParam != nil {
+			body += fmt.Sprintf(`if len(%s) == 0 {
+		return nil, fmt.Errorf("%s: buffer is empty")
+	}
+	`, bufParam.GoName, op.Name)
+		}
+	}
+
 	imageTypeString := op.ImageTypeString
 	if strings.Contains(op.Name, "thumbnail") {
 		imageTypeString = "vipsDetermineImageType(vipsImage)"

internal/generator/util.go

@@ -76,3 +76,12 @@ func getArrayType(goType string) string {
 		return "unknown"
 	}
 }
+
+func getBufferParameter(args []introspection.Argument) *introspection.Argument {
+	for _, arg := range args {
+		if arg.IsBuffer && arg.IsInput && arg.GoType == "[]byte" {
+			return &arg
+		}
+	}
+	return nil
+}