feat(tenpayv2): 新增部分接口

test/SKIT.FlurlHttpClient.Wechat.TenpayV2.UnitTests/TestCase_RequestSignTests.cs

@@ -0,0 +1,49 @@
+using System.Net.Http;
+using Xunit;
+
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV2.UnitTests
+{
+    public class TestCase_RequestSignTests
+    {
+        internal class InnerFakeRequest : WechatTenpaySignableRequest
+        {
+            [Newtonsoft.Json.JsonProperty("appid")]
+            [System.Text.Json.Serialization.JsonPropertyName("appid")]
+            public override string? AppId { get; set; }
+
+            [Newtonsoft.Json.JsonProperty("mch_id")]
+            [System.Text.Json.Serialization.JsonPropertyName("mch_id")]
+            public override string? MerchantId { get; set; }
+
+            [Newtonsoft.Json.JsonProperty("device_info")]
+            [System.Text.Json.Serialization.JsonPropertyName("device_info")]
+            public string? DeviceInfo { get; set; }
+
+            [Newtonsoft.Json.JsonProperty("body")]
+            [System.Text.Json.Serialization.JsonPropertyName("body")]
+            public string? Body { get; set; }
+        }
+
+        [Fact(DisplayName = "测试用例：生成请求签名")]
+        public void TestRequestSign()
+        {
+            const string MCHID = "10000100";
+            const string MCHKEY = "192006250b4c09247ec02edce69f6a2d";
+            var request = new InnerFakeRequest()
+            {
+                AppId = "wxd930ea5d5a258f4f",
+                MerchantId = MCHID,
+                DeviceInfo = "1000",
+                Body = "test",
+                NonceString = "ibuaiVcKdpRxkhJA"
+            };
+            var client = new WechatTenpayClient(MCHID, MCHKEY);
+            client.CreateRequest(request, HttpMethod.Post);
+
+            string actualSign = "9A0A8659F005D6984697E2CA0A9CF3B7";
+            string expectedSign = request.Signature!;
+
+            Assert.Equal(actualSign, expectedSign);
+        }
+    }
+}