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2e818da | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 | import json
from app.services.durable_jsonl_log import advance_cursor, append_line, read_pending_range
def test_append_and_read_pending_range_returns_new_lines(tmp_path):
jsonl_path = tmp_path / "log.jsonl"
cursor_path = tmp_path / "log.cursor.json"
append_line(jsonl_path, {"id": 1})
append_line(jsonl_path, {"id": 2})
lines, from_offset, through_offset = read_pending_range(jsonl_path, cursor_path, "reviewed_through_offset")
assert [json.loads(line)["id"] for line in lines] == [1, 2]
assert from_offset == 0
assert through_offset == jsonl_path.stat().st_size
def test_read_pending_range_excludes_entries_before_cursor(tmp_path):
jsonl_path = tmp_path / "log.jsonl"
cursor_path = tmp_path / "log.cursor.json"
append_line(jsonl_path, {"id": 1})
_, _, through_offset = read_pending_range(jsonl_path, cursor_path, "reviewed_through_offset")
advance_cursor(cursor_path, "reviewed_through_offset", through_offset)
append_line(jsonl_path, {"id": 2})
lines, from_offset, _ = read_pending_range(jsonl_path, cursor_path, "reviewed_through_offset")
assert [json.loads(line)["id"] for line in lines] == [2]
assert from_offset == through_offset
def test_read_pending_range_ignores_entries_appended_after_eof_snapshot(tmp_path):
jsonl_path = tmp_path / "log.jsonl"
cursor_path = tmp_path / "log.cursor.json"
append_line(jsonl_path, {"id": 1})
lines, from_offset, through_offset = read_pending_range(jsonl_path, cursor_path, "reviewed_through_offset")
# Simulates a message arriving while a Commit's read is already in flight.
append_line(jsonl_path, {"id": 2})
assert [json.loads(line)["id"] for line in lines] == [1]
advance_cursor(cursor_path, "reviewed_through_offset", through_offset)
remaining, _, _ = read_pending_range(jsonl_path, cursor_path, "reviewed_through_offset")
assert [json.loads(line)["id"] for line in remaining] == [2]
def test_advance_cursor_is_atomic_replace(tmp_path):
cursor_path = tmp_path / "log.cursor.json"
advance_cursor(cursor_path, "reviewed_through_offset", 100)
advance_cursor(cursor_path, "reviewed_through_offset", 250)
assert json.loads(cursor_path.read_text())["reviewed_through_offset"] == 250
def test_read_exact_range_ignores_entries_appended_after_the_range(tmp_path):
from app.services.durable_jsonl_log import read_exact_range
jsonl_path = tmp_path / "log.jsonl"
append_line(jsonl_path, {"id": 1})
_, from_offset, through_offset = read_pending_range(jsonl_path, tmp_path / "log.cursor.json", "reviewed_through_offset")
append_line(jsonl_path, {"id": 2}) # appended after the range was captured
lines = read_exact_range(jsonl_path, from_offset, through_offset)
assert [json.loads(line)["id"] for line in lines] == [1]
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