test: add integration tests for location API

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tests/test_location_api.py

@@ -0,0 +1,57 @@
+from fastapi.testclient import TestClient
+
+
+def test_register_location_success(client: TestClient):
+    """正常上架 — 应返回 200"""
+    resp = client.post(
+        "/CargoTrace/location",
+        json={"zongpai_no": "26B999", "location_code": "A01-02-03"},
+    )
+    assert resp.status_code == 200
+    data = resp.json()
+    assert data["zongpai_no"] == "26B999"
+    assert data["location_code"] == "A01-02-03"
+
+
+def test_register_location_duplicate(client: TestClient):
+    """重复上架 — 应返回 409"""
+    client.post(
+        "/CargoTrace/location",
+        json={"zongpai_no": "26C999", "location_code": "A01-02-03"},
+    )
+    resp = client.post(
+        "/CargoTrace/location",
+        json={"zongpai_no": "26C999", "location_code": "A02-01-01"},
+    )
+    assert resp.status_code == 409
+    data = resp.json()
+    assert data["detail"]["error_code"] == "DUPLICATE_LOCATION"
+    assert "existing_location" in data["detail"]["detail"]
+
+
+def test_register_location_invalid_zongpai(client: TestClient):
+    """无效总排号 — 应返回 422"""
+    resp = client.post(
+        "/CargoTrace/location",
+        json={"zongpai_no": "INVALID", "location_code": "A01-02-03"},
+    )
+    assert resp.status_code == 422
+
+
+def test_register_location_invalid_location(client: TestClient):
+    """无效货位号 — 应返回 422"""
+    resp = client.post(
+        "/CargoTrace/location",
+        json={"zongpai_no": "26T999", "location_code": "bad-location"},
+    )
+    assert resp.status_code == 422
+
+
+def test_register_location_trans_location(client: TestClient):
+    """转运特殊货位 — 应返回 200"""
+    resp = client.post(
+        "/CargoTrace/location",
+        json={"zongpai_no": "26BW0999", "location_code": "TRANS-01"},
+    )
+    assert resp.status_code == 200
+    assert resp.json()["location_code"] == "TRANS-01"