diff --git a/tests/t-fmt.py b/tests/t-fmt.py
new file mode 100644
index 0000000..d810d48
--- /dev/null
+++ b/tests/t-fmt.py
@@ -0,0 +1,50 @@
+import sys
+from pathlib import Path
+
+project_root = Path(__file__).parent.parent
+sys.path.append(str(project_root))
+
+from src.utils.fmt import fmt_level, fmt_level_number, fmt_console, fmt_message, fmt_placeholder
+
+print("日志级别测试")
+print(fmt_level("DEBUG"))
+print(fmt_level("INFO"))
+print(fmt_level("WARN"))
+print(fmt_level("ERRO"))
+print(fmt_level("CRIT"))
+print(fmt_level("UNKN"))
+
+print("日志级别数字测试")
+print(fmt_level_number(10))
+print(fmt_level_number(20))
+print(fmt_level_number(30))
+print(fmt_level_number(40))
+print(fmt_level_number(50))
+print(fmt_level_number(-1))
+print(fmt_level_number(100))
+
+print("消息格式化测试")
+print(fmt_message("测试消息: {time},\n {asctime}, \n{unknown}"))
+
+print("控制台格式化测试")
+print(fmt_console(10, "测试消息"))
+print("前缀测试")
+print(fmt_console(35, "测试消息", "可爱猫猫"))
+
+print("未知日志级别测试")
+print(fmt_console(-1, "测试消息"))
+
+
+print("颜色插值测试")
+print("分段颜色插值")
+formatted_msg = fmt_message("测试消息<#ff0000>red</>")
+processed_msg = fmt_placeholder(formatted_msg)
+print(fmt_console(15, processed_msg))
+
+print("单段颜色插值")
+print(fmt_console(15, fmt_placeholder("测试消息<#00ff00>green{asctime}</>", use_date_color=False)))
+
+print("不完整颜色插值")
+print(fmt_console(15, fmt_placeholder("测试消息<#00ff00>green{asctime}", use_date_color=False)))
+print(fmt_console(15, fmt_placeholder("测试消息</>green{asctime}", use_date_color=False)))
+print(fmt_console(15, fmt_placeholder("测试消息<#00ff000>green{asctime}</>", use_date_color=False)))
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