Add refund request funds account coverage

Author: mzl2233

weixin-java-pay/src/test/java/com/github/binarywang/wxpay/bean/request/WxPayRefundV3RequestTest.java

@@ -0,0 +1,56 @@
+package com.github.binarywang.wxpay.bean.request;
+
+import com.google.gson.Gson;
+import com.google.gson.JsonArray;
+import com.google.gson.JsonObject;
+import org.testng.annotations.Test;
+
+import java.util.Collections;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * {@link WxPayRefundV3Request} 单元测试
+ *
+ */
+public class WxPayRefundV3RequestTest {
+
+  @Test
+  public void testFundsAccountSerialization() {
+    WxPayRefundV3Request request = new WxPayRefundV3Request();
+    request.setOutRefundNo("1217752501201407033233368018");
+    request.setFundsAccount("AVAILABLE");
+
+    Gson gson = new Gson();
+    String json = gson.toJson(request);
+    JsonObject jsonObject = gson.fromJson(json, JsonObject.class);
+
+    assertThat(jsonObject.has("funds_account")).isTrue();
+    assertThat(jsonObject.get("funds_account").getAsString()).isEqualTo("AVAILABLE");
+  }
+
+  @Test
+  public void testAmountFromSerialization() {
+    WxPayRefundV3Request.From from = new WxPayRefundV3Request.From();
+    from.setAccount("AVAILABLE");
+    from.setAmount(444);
+
+    WxPayRefundV3Request.Amount amount = new WxPayRefundV3Request.Amount();
+    amount.setRefund(888);
+    amount.setTotal(888);
+    amount.setCurrency("CNY");
+    amount.setFrom(Collections.singletonList(from));
+
+    WxPayRefundV3Request request = new WxPayRefundV3Request();
+    request.setAmount(amount);
+
+    Gson gson = new Gson();
+    String json = gson.toJson(request);
+    JsonObject jsonObject = gson.fromJson(json, JsonObject.class);
+    JsonArray fromJson = jsonObject.getAsJsonObject("amount").getAsJsonArray("from");
+
+    assertThat(fromJson).hasSize(1);
+    assertThat(fromJson.get(0).getAsJsonObject().get("account").getAsString()).isEqualTo("AVAILABLE");
+    assertThat(fromJson.get(0).getAsJsonObject().get("amount").getAsInt()).isEqualTo(444);
+  }
+}