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improve test coverage for latency_changes

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Andrew Pimenov 2026-08-09 16:15:18 +03:00
parent 2a72bdb441
commit 15d4d745c4
1 changed files with 54 additions and 0 deletions
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54
tests/test_compare.py
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@ -72,6 +72,60 @@ def test_latency_of_a_report_against_itself_is_empty(before):
assert latency_changes(before, before) == []
def test_latency_changes_handles_missing_sections():
assert latency_changes({}, {}) == []
assert latency_changes({"latency": None}, {"latency": {"data": None}}) == []
def test_latency_changes_reports_all_metrics():
before = {
"latency": {
"data": [
{"label": "test-host", "avg_ms": 10.0, "jitter_ms": 2.0, "loss_pct": 0.0}
]
}
}
after = {
"latency": {
"data": [
{"label": "test-host", "avg_ms": 15.0, "jitter_ms": 5.0, "loss_pct": 1.5}
]
}
}
changes = latency_changes(before, after)
assert len(changes) == 3
changes_by_label = {c.label: c for c in changes}
assert changes_by_label["test-host avg_ms"].delta == 5.0
assert changes_by_label["test-host jitter_ms"].delta == 3.0
assert changes_by_label["test-host loss_pct"].delta == 1.5
def test_latency_changes_maintains_sorted_order():
before = {
"latency": {
"data": [
{"label": "zebra", "avg_ms": 10.0},
{"label": "alpha", "avg_ms": 20.0},
]
}
}
after = {
"latency": {
"data": [
{"label": "zebra", "avg_ms": 11.0},
{"label": "alpha", "avg_ms": 21.0},
{"label": "beta", "avg_ms": 30.0},
]
}
}
# Ensure after doesn't have beta in before so it shows up as a change
changes = latency_changes(before, after)
labels = [c.label for c in changes]
assert labels == ["alpha avg_ms", "beta avg_ms", "zebra avg_ms"]
def test_speed_deltas_cover_throughput_and_the_bufferbloat_grade(before, after):
changes = by_label(speed_changes(before, after))
assert changes["Download Mbps"].delta == pytest.approx(-188.2)