Adds testing for the database handling concurrent write requests

tests/concurrent_write_test.py

@@ -0,0 +1,29 @@
+from multiprocessing import Pool
+import json
+import requests
+
+
+def make_comment(num):
+    return{
+        'jsonrpc': '2.0',
+        'id': None,
+        'method': 'create_comment',
+        'params': {
+            'comment': f'Comment #{num}',
+            'claim_id': '6d266af6c25c80fa2ac6cc7662921ad2e90a07e7',
+        }
+    }
+
+
+def send_comment_to_server(params):
+    with requests.post(params[0], json=params[1]) as req:
+        return req.json()
+
+
+if __name__ == '__main__':
+    urls = [f'http://localhost:{port}/api' for port in range(5921, 5925)]
+    comments = [make_comment(i) for i in range(1, 5)]
+    inputs = list(zip(urls, comments))
+    print(json.dumps(inputs, indent=2))
+    with Pool(4) as pool:
+        print(json.dumps(pool.map(send_comment_to_server, inputs), indent=2))