Build Nginx live traffic monitor

tests/test_main.py

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+import time
+
+from app.main import Telemetry, parse_line
+
+
+def test_parse_line_and_multiple_upstreams():
+    event = parse_line("1720000000.123 example.test GET 200 120 240 0.150 0.100, 0.200")
+    assert event["host"] == "example.test"
+    assert event["incoming"] == 120
+    assert event["upstream_time"] == 0.15
+
+
+def test_malformed_lines_are_ignored():
+    assert parse_line("not enough fields") is None
+    assert parse_line("1 host GET nope 1 2 0.1 -") is None
+    assert parse_line("1 host GET 600 1 2 0.1 -") is None
+
+
+def test_telemetry_is_aggregated_and_bounded():
+    telemetry = Telemetry(60)
+    base = int(time.time()) - 30
+    for second in range(70):
+        telemetry.ingest(parse_line(f"{base + second} host GET 200 10 20 .1 -"))
+    assert telemetry.total_incoming == 700
+    assert len(telemetry.global_series.buckets) <= 60
+    snapshot = telemetry.snapshot(60)
+    assert snapshot["summary"]["requests"] >= 1
+    assert snapshot["hosts"] == ["host"]