Misc test harnesses (#749)

Some misc test harnesses for a few features

dev-tools/tests/librarian/simple_text_upload.py

@@ -0,0 +1,56 @@
+#!/usr/bin/env python3
+"""
+Minimal example: upload a small text document via websocket API
+"""
+
+import asyncio
+import json
+import base64
+import time
+import websockets
+
+async def main():
+    url = "ws://localhost:8088/api/v1/socket"
+
+    # Small text content
+    content = b"AAAAAAAAAABBBBBBBBBBCCCCCCCCCC"
+
+    request_id = 0
+
+    async def send_request(ws, request):
+        nonlocal request_id
+        request_id += 1
+        msg = {
+            "id": f"req-{request_id}",
+            "service": "librarian",
+            "request": request
+        }
+        await ws.send(json.dumps(msg))
+        response = json.loads(await ws.recv())
+        if "error" in response:
+            raise Exception(response["error"])
+        return response.get("response", {})
+
+    async with websockets.connect(url) as ws:
+
+        print(f"Uploading {len(content)} bytes...")
+
+        resp = await send_request(ws, {
+            "operation": "add-document",
+            "document-metadata": {
+                "id": "test-chunked-doc-001",
+                "time": int(time.time()),
+                "kind": "text/plain",
+                "title": "My Test Document",
+                "comments": "Small doc for chunk testing",
+                "user": "trustgraph",
+                "tags": ["test"],
+                "metadata": [],
+            },
+            "content": base64.b64encode(content).decode("utf-8"),
+        })
+
+        print("Done!")
+
+if __name__ == "__main__":
+    asyncio.run(main())