Improve test suite

Improves the existing test suite by splitting the single test file into multiple files.

Also adds the ability for other people to use the tests with some example data.

tests/support.py

@@ -0,0 +1,93 @@
+import csv
+import json
+import sys
+import unittest
+from pathlib import Path
+from unittest.mock import Mock, patch
+from tempfile import TemporaryDirectory
+
+ROOT = Path(__file__).resolve().parents[1]
+SRC = ROOT / "src"
+FIXTURES = ROOT / "tests" / "fixtures"
+if str(SRC) not in sys.path:
+    sys.path.insert(0, str(SRC))
+
+from nte_history_exporter import __version__
+from nte_history_exporter.decoder.boundary import annotate_groups, make_uid
+from nte_history_exporter.constants import LIMITED_CHARACTER_MARKER, MARKER
+from nte_history_exporter.decoder.boundary import select_continuous_run_from_page_1
+from nte_history_exporter.decoder.protocol import decode_response_records, history_request_kind
+from nte_history_exporter.constants import POOL_META
+from nte_history_exporter.mappings import ARC_META, CHARACTERS, ITEMS, REWARDS_BY_ID
+from nte_history_exporter.decoder.protocol import decode_reward_key, infer_reward_type
+from nte_history_exporter.decoder.user_uid import extract_user_uid
+from nte_history_exporter.export.csv_export import write_csv
+from nte_history_exporter.decoder.arc import (
+    arc_request_page,
+    build_arc_rows_from_pairs,
+    decode_arc_key,
+    decode_arc_timestamp,
+    is_arc_history_request,
+    make_arc_uid,
+    parse_arc_response,
+)
+from nte_history_exporter.live_capture.session import LiveHistorySession, UdpPacket
+from nte_history_exporter.live_capture.libpcap import (
+    DLT_EN10MB,
+    DLT_LINUX_SLL,
+    DLT_LINUX_SLL2,
+    DLT_LOOP,
+    DLT_RAW,
+    _extract_ipv4_frame,
+    _load_library,
+    LibpcapUnavailable,
+)
+from nte_history_exporter.live_capture.windows_raw import parse_ipv4_packet
+from nte_history_exporter.live_capture.backends import open_capture_backend
+from nte_history_exporter.export.json_export import build_export_json
+from nte_history_exporter.live_capture.runner import export_paths
+from nte_history_exporter.pool_mappings import load_pool_mappings, pool_meta_from_mapping
+from nte_history_exporter.update_check import UpdateInfo, check_for_update, is_newer_version
+
+
+def decode_single_record(record_hex):
+    return decode_response_records(bytes(0x50) + bytes.fromhex(record_hex))[0]
+
+
+def load_network_fixture():
+    path = FIXTURES / "synthetic_history_network.json"
+    with path.open(encoding="utf-8") as f:
+        return json.load(f)
+
+
+def fixture_packets(scenario=None):
+    fixture = load_network_fixture()
+    packets = fixture["packets"]
+    if scenario is not None:
+        packets = [packet for packet in packets if packet["scenario"] == scenario]
+    return [
+        UdpPacket(
+            timestamp=packet["timestamp"],
+            src_ip=packet["src_ip"],
+            dst_ip=packet["dst_ip"],
+            src_port=packet["src_port"],
+            dst_port=packet["dst_port"],
+            payload=bytes.fromhex(packet["payload_hex"]),
+            protocol=packet["protocol"],
+        )
+        for packet in packets
+    ]
+
+
+def fixture_payload(label):
+    fixture = load_network_fixture()
+    packet = next(packet for packet in fixture["packets"] if packet["label"] == label)
+    return bytes.fromhex(packet["payload_hex"])
+
+
+def fixture_session():
+    fixture = load_network_fixture()
+    session = LiveHistorySession(fixture["local_ip"])
+    for packet in fixture_packets("replay"):
+        session.process_packet(packet)
+    return session