fix(finance): stabilize settlement idempotency request hashes

2026-10-21 10:41:38 +08:00
parent f00d0e16cf
commit b072c0a884
2 changed files with 44 additions and 1 deletions
@@ -0,0 +1,39 @@
+package com.baiyue.finance;
+
+import com.baiyue.finance.service.FinanceSettlementService;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.junit.jupiter.api.Test;
+import org.springframework.test.util.ReflectionTestUtils;
+
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class FinanceSettlementRequestHashTest {
+    /** 模拟不同 JVM 的 Map 遍历顺序；同一付款请求必须得到相同摘要。 */
+    @Test
+    void equivalentRequestsIgnoreMapIterationOrderButDetectChangedPayment() {
+        var service = new FinanceSettlementService(null, new ObjectMapper(), null, null, null);
+        Map<String, Object> body = new LinkedHashMap<>();
+        body.put("amount", 190); body.put("expectedVersion", 0);
+        Map<String, Object> first = new LinkedHashMap<>();
+        first.put("path", "/settlements/202/transactions"); first.put("method", "POST");
+        first.put("customerId", 10L); first.put("body", body);
+        Map<String, Object> reversedBody = new LinkedHashMap<>();
+        reversedBody.put("expectedVersion", 0); reversedBody.put("amount", 190);
+        Map<String, Object> second = new LinkedHashMap<>();
+        second.put("body", reversedBody); second.put("customerId", 10L);
+        second.put("method", "POST"); second.put("path", "/settlements/202/transactions");
+
+        String original = ReflectionTestUtils.invokeMethod(service, "hash", first);
+        String reordered = ReflectionTestUtils.invokeMethod(service, "hash", second);
+        assertThat(reordered).isEqualTo(original);
+        reversedBody.put("amount", 191);
+        String changed = ReflectionTestUtils.invokeMethod(service, "hash", second);
+        assertThat(changed).isNotEqualTo(original);
+        second.put("customerId", 11L); reversedBody.put("amount", 190);
+        String otherCustomer = ReflectionTestUtils.invokeMethod(service, "hash", second);
+        assertThat(otherCustomer).isNotEqualTo(original);
+    }
+}