add import xlsx test

tests/api/test_import_xlsx.py

@@ -0,0 +1,27 @@
+from anyio import Path
+
+import pytest
+from fastapi import status
+from httpx import AsyncClient
+
+# Integration tests
+pytestmark = pytest.mark.anyio
+
+
+async def test_import_animals(client: AsyncClient):
+    # Arrange
+    expected_status = status.HTTP_201_CREATED
+    headers = {"Content-type": "multipart/form-data; boundary={}"}
+
+    path = Path("tests/api/nonsense.xlsx")
+
+    _bytes = await path.read_bytes()
+
+    response = await client.post(
+        "/nonsense/import",
+        files={"xlsx": ("nonsense.xlsx", _bytes)},
+        headers=headers,
+    )
+
+    assert response.status_code == expected_status
+    assert response.json() == {'filename': 'nonsense.xlsx', 'nonsense_records': 10}