test: 提取公共测试流程

test/SKIT.FlurlHttpClient.Wechat.TestTools/TestIOUtil.cs

@@ -0,0 +1,27 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+
+namespace SKIT.FlurlHttpClient.Wechat
+{
+    public static class TestIOUtil
+    {
+        public static string[] GetAllFiles(string path)
+        {
+            if (path == null) throw new ArgumentNullException(nameof(path));
+
+            List<string> results = new List<string>();
+            string[] dirs = Directory.GetDirectories(path);
+            string[] files = Directory.GetFiles(path);
+
+            results.AddRange(files);
+
+            foreach (string dir in dirs)
+            {
+                results.AddRange(GetAllFiles(dir));
+            }
+
+            return results.ToArray();
+        }
+    }
+}