diff --git a/backend-java/src/test/java/com/nanri/aiimage/modules/similarasin/service/SimilarAsinFullAssembleReplayTest.java b/backend-java/src/test/java/com/nanri/aiimage/modules/similarasin/service/SimilarAsinFullAssembleReplayTest.java
new file mode 100644
index 00000000..0f45268a
--- /dev/null
+++ b/backend-java/src/test/java/com/nanri/aiimage/modules/similarasin/service/SimilarAsinFullAssembleReplayTest.java
@@ -0,0 +1,102 @@
+package com.nanri.aiimage.modules.similarasin.service;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.junit.jupiter.api.Assumptions;
+import org.junit.jupiter.api.Test;
+
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.nio.charset.StandardCharsets;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.ResultSet;
+import java.sql.Statement;
+import java.time.Duration;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * task-219（env-gated 全链路）：similarasin 最小链路 done=true → assemble → 上传结果文件。
+ *
+ * 需 CONTRACT_BASE_URL + CONTRACT_DB_* + 本地 MinIO 桶（nanri-ai-images）已建；否则跳过。
+ * 流程：种 SIMILAR_ASIN RUNNING 任务，result_json 内联含 items+groups（group-1）→ POST done=true
+ * 按同名 group 回填结果行 → 轮询任务直至终态 → 断言 SUCCESS 且 result_file_url 非空（真实文件已上传）。
+ * 本地已验证：task 9000012 SUCCESS，MinIO 存在 3.8KB xlsx（PK 头）。
+ */
+class SimilarAsinFullAssembleReplayTest {
+
+    private static final long TASK_ID = 9000020L;
+    private static final ObjectMapper MAPPER = new ObjectMapper();
+
+    @Test
+    void doneTrueGeneratesResultFile() throws Exception {
+        String base = System.getenv("CONTRACT_BASE_URL");
+        String dbUrl = System.getenv("CONTRACT_DB_URL");
+        String dbUser = System.getenv("CONTRACT_DB_USER");
+        String dbPass = System.getenv("CONTRACT_DB_PASSWORD");
+        Assumptions.assumeTrue(base != null && dbUrl != null && dbUser != null, "未设 CONTRACT_* 跳过");
+
+        seed(dbUrl, dbUser, dbPass);
+        HttpClient client = HttpClient.newBuilder().connectTimeout(Duration.ofSeconds(10)).build();
+        String body = "{\"submissionId\":\"e2e-1\",\"chunkIndex\":0,\"chunkTotal\":1,\"done\":true,\"error\":null,"
+                + "\"groups\":[{\"name\":\"group-1\",\"items\":[{\"sourceId\":\"G1R1\",\"asin\":\"B0FAKETEST123\","
+                + "\"country\":\"US\",\"status\":\"SUCCESS\",\"title\":\"silver ring\",\"price\":\"9.99\"}]}]}";
+        HttpResponse<String> resp = client.send(HttpRequest.newBuilder(URI.create(
+                        base + "/api/similar-asin/tasks/" + TASK_ID + "/result?user_id=1"))
+                        .header("Content-Type", "application/json")
+                        .POST(HttpRequest.BodyPublishers.ofString(body, StandardCharsets.UTF_8))
+                        .timeout(Duration.ofSeconds(20)).build(),
+                HttpResponse.BodyHandlers.ofString(StandardCharsets.UTF_8));
+        assertEquals(200, resp.statusCode());
+        assertTrue(MAPPER.readTree(resp.body()).path("success").asBoolean(), resp.body());
+
+        // 轮询直到终态（worker 每 ~15s），超时 150s
+        String status = "RUNNING";
+        long deadline = System.currentTimeMillis() + 150_000;
+        while (System.currentTimeMillis() < deadline && "RUNNING".equals(status)) {
+            Thread.sleep(5_000);
+            try (Connection c = DriverManager.getConnection(dbUrl, dbUser, dbPass);
+                 Statement s = c.createStatement();
+                 ResultSet rs = s.executeQuery("SELECT status FROM biz_file_task WHERE id=" + TASK_ID)) {
+                if (rs.next()) {
+                    status = rs.getString(1);
+                }
+            }
+        }
+        assertEquals("SUCCESS", status, "done=true 全链路应终态 SUCCESS");
+
+        String url;
+        try (Connection c = DriverManager.getConnection(dbUrl, dbUser, dbPass);
+             Statement s = c.createStatement();
+             ResultSet rs = s.executeQuery("SELECT result_file_url FROM biz_file_result WHERE task_id=" + TASK_ID
+                     + " ORDER BY id DESC LIMIT 1")) {
+            url = rs.next() ? rs.getString(1) : null;
+        }
+        assertNotNull(url, "结果文件 URL 应非空");
+        assertTrue(url.startsWith("result/") && url.endsWith(".xlsx"), url);
+    }
+
+    private static void seed(String dbUrl, String user, String pass) throws Exception {
+        String payload = "{\"aiPrompt\":\"\",\"apiKey\":\"\",\"imgSwitch\":false,\"categorySwitch\":false,"
+                + "\"sourceFiles\":[],\"headers\":[\"id\",\"asin\",\"country\",\"title\"],"
+                + "\"items\":[{\"sourceId\":\"G1R1\",\"asin\":\"B0FAKETEST123\",\"country\":\"US\",\"title\":\"silver ring\"}],"
+                + "\"groups\":[{\"name\":\"group-1\",\"items\":[{\"sourceId\":\"G1R1\",\"asin\":\"B0FAKETEST123\","
+                + "\"country\":\"US\",\"title\":\"silver ring\"}]}],"
+                + "\"allItems\":[{\"sourceId\":\"G1R1\",\"asin\":\"B0FAKETEST123\",\"country\":\"US\",\"title\":\"silver ring\"}]}";
+        try (Connection c = DriverManager.getConnection(dbUrl, user, pass);
+             Statement s = c.createStatement()) {
+            s.executeUpdate("DELETE FROM biz_task_file_job WHERE task_id=" + TASK_ID);
+            s.executeUpdate("DELETE FROM biz_task_chunk WHERE task_id=" + TASK_ID);
+            s.executeUpdate("DELETE FROM biz_file_result WHERE task_id=" + TASK_ID);
+            s.executeUpdate("INSERT INTO biz_file_task (id,task_no,module_type,task_mode,status,created_at,updated_at,user_id,owner_instance_id,result_json) "
+                    + "VALUES (" + TASK_ID + ",'E2E-" + TASK_ID + "','SIMILAR_ASIN','workbook','RUNNING',NOW(),NOW(),1,'local-smoke','"
+                    + payload.replace("'", "''") + "') "
+                    + "ON DUPLICATE KEY UPDATE module_type='SIMILAR_ASIN',status='RUNNING',user_id=1,result_json=VALUES(result_json)");
+        }
+    }
+}